Exhibit 10.54

[LETTERHEAD OF WACHOVIA CAPITAL FINANCE CORPORATION (CENTRAL)]

April 2, 2009

VIA EMAIL

SMTC
Manufacturing Corporation of California

2302 Trade Zone Boulevard

San Jose, California USA 95131

-and-

SMTC Manufacturing Corporation of Massachusetts

109 Constitution Boulevard, Unit 160

Franklin, Massachusetts USA 02038

-and-

SMTC Mex Holdings, Inc.

635 Hood Road

Markham, Ontario Canada L3R 4N6

Dear Ms. Jane Todd:



|Re: | Wachovia Capital Finance Corporation (Central), Export Development Canada, SMTC Manufacturing Corporation of California, SMTC Manufacturing Corporation of Massachusetts and
SMTC Mex Holdings, Inc.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Reference is made to the second amended and restated US loan agreement dated as of
August 7, 2008 (as amended, modified, supplemented, extended, renewed, restated or replaced from time to time, the US Loan Agreement) between Wachovia Capital Finance Corporation (Central), as the Revolving Lender and the
Agent, Export Development Canada, as the Tranche B Lender and the Tranche B Agent, and each of SMTC Manufacturing Corporation of California, SMTC Manufacturing Corporation of Massachusetts and SMTC Mex Holdings, Inc., as the US Borrowers.



|1. | Definitions. In this letter, unless otherwise defined or the context otherwise requires, all capitalized terms shall have the respective meanings specified in the US Loan
Agreement.
|-- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|2. | Waiver of Existing Events of Default.
|-- | -------------------------------------



| | (a) | Two (2) Events of Default have occurred and are existing under Section 9.1(a)(ii) of the US Loan Agreement as a result of the US Borrowers breaching:
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------



| | (i) | the EBITDA covenant in Section 8.18 of the US Loan Agreement. More specifically, each US Borrower failed to ensure that EBITDA for SMTC Corporation and its Subsidiaries
was not less than US$8,500,000 on a consolidated rolling four (4) fiscal quarter basis at the end of December 2008; and
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



---

Page 2



| | (ii) | the Fixed Charge Coverage Ratio covenant in Section 8.22 of the US Loan Agreement. More specifically, each US Borrower failed to ensure that SMTC Corporation and its
Subsidiaries maintain a Fixed Charge Coverage Ratio of not less than 1.00x on a consolidated rolling four (4) fiscal quarter basis at the end of December 2008,
| | ---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

(collectively, the Existing Events of Default).



| | (b) | In the sole and absolute discretion of each of the Agent, the Tranche B Agent and the US Lenders, and in reliance on the specific description of the Existing Events of Default
herein, each of the Agent, the Tranche B Agent and the US Lenders hereby waives the Existing Events of Default.
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (c) | Notwithstanding the foregoing, the waiver by each of the Agent, the Tranche B Agent and the US Lenders as set forth herein:
| | --- | ---------------------------------------------------------------------------------------------------------------------------



| | (i) | shall not extend to any other Default or Event of Default;
| | --- | ----------------------------------------------------------



| | (ii) | shall not be construed as a waiver of any other provision of the Financing Agreements or any further or future action on the part of any of the US Borrowers or the Obligors that
would require a consent or waiver by any of the Agent, the Tranche B Agent or the US Lenders; and
| | ---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (iii) | is intended to be limited to the specific purpose and intent for which same has been provided and does not prejudice any rights or remedies that any of the Agent, the Tranche B
Agent and the US Lenders may now have or may have in the future under or in connection with the US Loan Agreement or the other Financing Agreements including, without limitation, the exercise of any rights and remedies by any of the Agent, the
Tranche B Agent and the US Lenders.
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (d) | Each of the Agent, the Tranche B Agent and the US Lenders reserves its rights and remedies at any time and from time to time in connection with any Default or Event of Default now
existing or hereafter arising, other than the Existing Events of Default specifically waived herein.
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|3. | Amendment to US Loan Agreement.
|-- | -------------------------------



| | (a) | This letter is also an amendment to the US Loan Agreement. Unless the context of this letter otherwise requires, the US Loan Agreement and this letter shall be read together and
shall have effect as if the provisions of the US Loan Agreement and this letter were contained in one agreement. The term Agreement when used in the US Loan Agreement means the US Loan Agreement as amended by this letter, together
with all amendments, modifications, supplements, extensions, renewals, restatements and replacements thereof from time to time.
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | The US Loan Agreement is amended as follows:
| | --- | --------------------------------------------



---

Page 3



| | (i) | The definition of Applicable Margin in Section 1.5 of the US Loan Agreement is amended by deleting the existing table therein and replacing it with
the following table:
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|          |  |                                                    |  |                                       |   |  |                                           |  
|--------- |  | -------------------------------------------------- |  | ------------------------------------- | - |  | ----------------------------------------- | -
|Level     |  | Total Leverage Ratio                               |  | Applicable Margin forLibor Rate Loans |   |  | Applicable Margin forReference Rate Loans |  
|          |  |                                                    | 
|Level I   |  | Greater than or equal to 2.00x                     |  | 5.50                                  | % |  | 4.25                                      | %
|          |  |                                                    | 
|Level II  |  | Less than 2.00x but greater than or equal to 1.50X |  | 5.00                                  | % |  | 3.75                                      | %
|          |  |                                                    | 
|Level III |  | Less than 1.50x                                    |  | 4.50                                  | % |  | 3.25                                      | %



| | (ii) | The definition of EBITDA in Section 1.49 of the US Loan Agreement is amended by adding the following new paragraph after subparagraph (iv):
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------



| |  | For purposes of EBITDA calculations with respect to fiscal year 2009 and the first fiscal quarter of 2010 of SMTC Corporation, negative EBITDA up to US$10,000,000 incurred by
SMTC Corporation and its Subsidiaries in such period generated by the Boston operations and other restructuring as set out in the 2009 projections of SMTC Corporation provided by the US Borrowers to EDC and Wachovia and approved by them shall be
excluded from such calculations..
| |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (iii) | The definition of Interest Rate in Section 1.81 of the US Loan Agreement is amended as follows:
| | ----- | -------------------------------------------------------------------------------------------------



| | (A) | by inserting plus two (2%) percent per annum after Prime Rate in the first line; and
| | --- | ----------------------------------------------------------------------------------------



| | (B) | by deleting three (3%) in the third line and replacing it with five (5%).
| | --- | -----------------------------------------------------------------------------



| | (iv) | The definition of Total Debt in Section 1.139 of the US Loan Agreement is deleted and replaced with:
| | ---- | ------------------------------------------------------------------------------------------------------



| |  | 1.139 Total Debt
| |  | -------------------



| |  | Total Debt shall mean, at any time, the outstanding amount of the Obligations and all other obligations, liabilities and indebtedness of SMTC Corporation and its
Subsidiaries, calculated on a consolidated basis and in accordance with GAAP, secured by valid and perfected first priority Liens on any property, assets or undertaking of such Persons minus the amount of cash held in the bank accounts of
such Persons..
| |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



---

Page 4



| | (v) | Schedule 2.3(b)(i) to the US Loan Agreement is deleted and replaced with Schedule 2.3(b)(i) attached to this letter.
| | --- | --------------------------------------------------------------------------------------------------------------------



| | (vi) | Section 8.6(a)(i) Financial Statements and Other Information of the US Loan Agreement is deleted and replaced with:
| | ---- | ---------------------------------------------------------------------------------------------------------------------



| |  | (i) within thirty (30) days after the end of each fiscal month or within forty-five (45) days after the end of a fiscal month that is the month end of a fiscal
quarter of SMTC Corporation, monthly unaudited financial statements of Canadian Borrower and US Borrowers and unaudited consolidating financial statements of SMTC Corporation (including in each case balance sheets, statements of income and loss,
statements of cash flow, statements of shareholders equity, sales backlog reports and sales and profitability reports for the ten (10) largest customers of SMTC and its Subsidiaries), all in reasonable detail, fairly presenting the
financial position and the results of the operations of US Borrowers, Canadian Borrower and SMTC Corporation and their respective Subsidiaries as of the end of and through such fiscal month together with a certificate of the chief financial officer
of each US Borrower in form and content satisfactory to US Lenders and substantially in the form attached hereto as Schedule 8.6 (each, an Officers Compliance Certificate) setting out compliance with Sections 8.18and 8.22, as applicable, each as at the end of the most recent fiscal month of SMTC Corporation, and the calculations used to determine such compliance and attaching the financial statements used to determine such compliance;.
| |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (vii) | Section 8.6(a)(ii) Financial Statements and Other Information of the US Loan Agreement is deleted and replaced with:
| | ----- | ----------------------------------------------------------------------------------------------------------------------



| |  | (ii) within forty-five (45) days after the end of each fiscal quarter of SMTC Corporation, quarterly unaudited financial statements of Canadian Borrower and US Borrowers
and unaudited consolidating financial statements of SMTC Corporation (including in each case balance sheets, statements of income and loss, statements of cash flow, statements of shareholders equity, sales backlog reports and sales and
profitability reports for the ten (10) largest customers of SMTC and its Subsidiaries), all in reasonable detail, fairly presenting the financial position and the results of the operations of US Borrowers, Canadian Borrower and SMTC Corporation
and their respective Subsidiaries as of the end of and through such fiscal quarter together with an Officers Compliance Certificate in form and content satisfactory to US Lenders setting out the Total Leverage Ratio for the calculation of the
Applicable Margin and compliance with Sections 8.23 and 8.24 each as at the end of the most recent fiscal quarter of SMTC Corporation, and the calculations used to determine such ratio and compliance and attaching the financial
statements used to determine such ratio and compliance;.
| |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (viii) | Schedules 8.6 and 8.18 hereto shall be schedules to the US Loan Agreement.
| | ------ | --------------------------------------------------------------------------



---

Page 5



| | (ix) | Section 8.18 EBITDA of the US Loan Agreement is deleted and replaced with:
| | ---- | ----------------------------------------------------------------------------



| |  | 8.18 EBITDA
| |  | ------------

Each US
Borrower shall ensure that EBITDA for SMTC Corporation and its Subsidiaries, calculated at the end of each month on a consolidated trailing twelve (12) month basis, shall not be less than the amounts set forth in the table below:



|               |  |             
|-------------- |  | ------------
|               | 
|End of Month   |  | TTM EBITDA  
|               | 
|January
2009   |  | US$5,900,000
|               | 
|February
2009  |  | US$6,200,00 
|               | 
|March
2009     |  | US$3,400,000
|               | 
|April
2009     |  | US$3,400,000
|               | 
|May
2009       |  | US$4,200,000
|               | 
|June
2009      |  | US$3,700,000
|               | 
|July
2009      |  | US$4,200,000
|               | 
|August
2009    |  | US$4,000,000
|               | 
|September
2009 |  | US$3,700,000
|               | 
|October
2009   |  | US$3,800,000
|               | 
|November
2009  |  | US$4,300,000
|               | 
|December
2009  |  | US$3,800,000
|               | 
|January
2010   |  | US$4,200,000
|               | 
|February
2010  |  | US$4,700,000
|               | 
|March
2010     |  | US$5,500,000

It is the intention of the Agent, the Tranche B Agent and the US Borrowers to
reset in writing the EBITDA covenant in Section 8.18 by April 10, 2010 and if the Agent, the Tranche B Agent and the US Borrowers cannot agree on such reset by April 10, 2010 then the US Borrowers shall comply with the Fixed
Charge Coverage Ratio in Section 8.22.

The Agent, the Tranche B Agent and the US Borrowers acknowledge and
agree that Schedule 8.18 sets out how the Agent calculated the EBITDA covenant in Section 8.18 and that total 2008 EBITDA of US$5,897,000 in column A in Schedule 8.18 represents EBITDA for 2008 retrieved from SMTC
Corporations 2008 financial statements..



| | (x) | Section 8.22 Fixed Charge Coverage Ratio of the US Loan Agreement is deleted and replaced with:
| | --- | -------------------------------------------------------------------------------------------------



---

Page 6



| |  | 8.22 Fixed Charge Coverage Ratio
| |  | ---------------------------------

In the event that the Agent, the Tranche B Agent and the US Borrowers cannot agree to reset in writing the EBITDA covenant in Section 8.18 by April 10, 2010 then each US Borrower shall ensure that SMTC Corporation and its
Subsidiaries maintain a Fixed Charge Coverage Ratio of not less than 1.25:1 calculated at the end of each fiscal month starting with April 2010 on a consolidated trailing twelve (12) month basis and in accordance with GAAP..



| | (xi) | Section 8.23 Maximum Total Debt of the US Loan Agreement is deleted and replaced with the following:
| | ---- | ------------------------------------------------------------------------------------------------------



| |  | 8.23 Maximum Total Debt
| |  | ------------------------

Each US Borrower shall ensure that the outstanding Total Debt of SMTC Corporation and its Subsidiaries under this Agreement, the Canadian Loan Agreement and Capital Leases shall not exceed the applicable number set forth in the table below
times trailing twelve (12) month EBITDA of SMTC Corporation and its Subsidiaries calculated at the end of each fiscal quarter in the table below on a consolidated basis in accordance with GAAP:



|                               |  |                          
|------------------------------ |  | -------------------------
|                               | 
|End of Fiscal Quarter          |  | Maximum Total Debt/EBITDA
|                               | 
|March 2009                     |  | 6.3x                     
|                               | 
|June 2009                      |  | 4.7x                     
|                               | 
|September 2009                 |  | 3.9x                     
|                               | 
|December 2009                  |  | 3.1x                     
|                               | 
|Each Fiscal Quarter thereafter |  | 3.0x                     



| | (xii) | Section 8.24 Maximum Capital Expenditures of the US Loan Agreement is deleted and replaced with:
| | ----- | --------------------------------------------------------------------------------------------------



| |  | 8.24 Maximum Unfunded Capital Expenditures
| |  | -------------------------------------------

Each US Borrower shall ensure that SMTC Corporation and its Subsidiaries do not, directly or indirectly, make or commit to make, whether through purchase, capital leases or otherwise, unfunded Capital Expenditures in
an aggregate amount in excess of US$1,000,000 for fiscal year 2009 of SMTC Corporation.

It is the intention of the Agent,
the Tranche B Agent and the US Borrowers to reset in writing the Maximum Unfunded Capital Expenditures covenant in Section 8.24 by April 10, 2010 and if the Agent, the Tranche B Agent and the US Borrowers cannot agree on such reset
by April 10, 2010 then the maximum unfunded capital expenditure amount above shall be US$500,000 for each fiscal year of SMTC Corporation on a go forward basis..



---

Page 7



| | (xiii) | Section 8 Affirmative and Negative Covenants of the US Loan Agreement is amended by adding the following new Section 8.26 Total
Excess Availability thereto:
| | ------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | 8.26 Total Excess Availability
| |  | -------------------------------

US Borrowers shall ensure that Total Excess Availability at all times is not less than US$1,000,000..



| | (xiv) | Section 9.1(a)(ii) Events of Default of the US Loan Agreement is amended by:
| | ----- | ------------------------------------------------------------------------------



| | (A) | deleting and in the fourth line and replacing it with ,; and
| | --- | ----------------------------------------------------------------



| | (B) | inserting and 8.26 after 8.25 in the fourth line.
| | --- | -----------------------------------------------------



| | (c) | The effective date of the amendment to the US Loan Agreement provided in this letter is April 2, 2009.
| | --- | ------------------------------------------------------------------------------------------------------



|4. | No Novations. Nothing in this letter, or in the US Loan Agreement when read together with this letter, shall constitute a novation, payment, re-advance or reduction or
termination in respect of any Obligations.
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|5. | Financing Agreement. This letter is a Financing Agreement.
|-- | ----------------------------------------------------------



|6. | Amendment Fees.
|-- | ---------------



| | (a) | The US Borrowers shall pay to the Agent an amendment fee of US$100,000 which amendment fee shall be fully earned as of and payable on the date hereof.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | The US Borrowers shall pay to the Tranche B Agent an amendment fee of US$32,500 which amendment fee shall be fully earned as of and payable on the date hereof.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------



|7. | Expenses. The US Borrowers shall pay all fees, expenses and disbursements including, without limitation, legal fees, incurred by or payable to the Agent, Tranche B Agent and
US Lenders in connection with the preparation, negotiation, completion, execution, delivery and review of this letter and all other documents and instruments arising therefrom and/or executed in connection therewith.
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|8. | Conditions Precedent to Effectiveness. This letter shall not be effective until each of the following conditions has been met to the satisfaction of each of the Agent, the
Tranche B Agent and the US Lenders or has been waived in writing (in whole or in part) by all of them in their sole respective discretion:
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



---

Page 8



| | (a) | the Agent, the Tranche B Agent and the US Lenders have received this letter duly authorized, executed and delivered by each of the US Borrowers and the Obligors;
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | the fees set out in Section 6 above have been paid by the US Borrowers;
| | --- | -----------------------------------------------------------------------



| | (c) | no Default or Event of Default has occurred and is continuing other than the Existing Events of Default; and
| | --- | ------------------------------------------------------------------------------------------------------------



| | (d) | no material adverse change shall have occurred with respect to any of the US Borrowers or the Obligors since the date of the Agents latest field examination and no change or
event shall have occurred which would have a material adverse effect on any of the US Borrowers or the Obligors.
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|9. | Continuance of US Loan Agreement and Security.
|-- | ----------------------------------------------



| | (a) | The US Loan Agreement, as amended by this letter, shall be and continue in full force and effect and is hereby confirmed and the rights and obligations of all parties thereunder
shall not be affected or prejudiced in any manner except as specifically provided for herein.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | Each of the US Borrowers and the Obligors hereby acknowledges, confirms and agrees that:
| | --- | ----------------------------------------------------------------------------------------



| | (i) | all security delivered by the US Borrowers and the Obligors secures the payment of all of the Obligations including, without limitation, the obligations arising under the US Loan
Agreement, as amended by the terms of this letter;
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | the Agent, the Tranche B Agent and the US Lenders shall continue to have valid, enforceable and perfected first priority liens upon the collateral described in the Financing
Agreements, subject only to liens expressly permitted pursuant to the US Loan Agreement.
| | ---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (c) | To induce the Agent, the Tranche B Agent and the US Lenders to enter into this letter, each of the US Borrowers and the Obligors hereby represent and warrant to each of the Agent,
the Tranche B Agent and the US Lenders as follows, which representations and warranties shall survive the execution and delivery of this letter:
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (i) | after giving effect to this letter, the US Borrowers and the Obligors are in compliance with all covenants in the Financing Agreements;
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | after giving effect to this letter, all the representations and warranties set out in the Financing Agreements are true and accurate;
| | ---- | -------------------------------------------------------------------------------------------------------------------------------------



| | (iii) | after giving effect to this letter, no Default or Event of Default has occurred or is continuing;
| | ----- | -------------------------------------------------------------------------------------------------



| | (iv) | after giving effect to this letter, no material adverse change has occurred with respect to any of the US Borrowers or the Obligors since the date of the Agents latest field
examination and no change or event has occurred which would have a material adverse effect on any of the US Borrowers or the Obligors;
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



---

Page 9



| | (v) | the execution delivery, delivery and performance of this letter and the transactions contemplated hereunder are all within its powers, have been duly authorized by it and are not in
contravention of law or the terms of its organizational documents or any indenture, agreement or undertaking to which it is a party or by which it or its property is bound;
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (vi) | it has duly executed and delivered this letter; and
| | ---- | ---------------------------------------------------



| | (vii) | this letter constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms.
| | ----- | ---------------------------------------------------------------------------------------------------------------------



|10. | Counterparts. This letter may be executed in any number of separate original, facsimile or pdf counterparts, each of which shall be deemed an original and all of said
counterparts taken together shall be deemed to constitute one and the same instrument.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|11. | Governing Law. The validity, interpretation and enforcement of this letter and any dispute arising out of the relationship between the parties hereto, whether in contract,
tort, equity or otherwise, shall be governed by the laws of the State of Illinois.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|12. | Further Assurances. At the request of any of the Agent, the Tranche B Agent and the US Lenders at any time and from time to time, each of the US Borrowers and the Obligors
shall, at their expense, duly execute and deliver, or cause to be duly executed and delivered, such further agreements, documents and instruments, and do or cause to be done such further acts as may be requested by any of the Agent, the Tranche B
Agent and the US Lenders to effectuate the provisions or purposes of this letter.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[REMAINDER OF PAGE INTENTIONALLY LEFT
BLANK]



---

Page 10



| | Amendments and Waivers. Neither this letter nor any provision hereof shall be amended, modified, waived or discharged orally or by course of conduct, but only by a written
agreement signed by the parties hereto.
| | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|13. | Headings. The division of this letter into sections and the insertion of headings are for convenience of reference only and shall not affect the construction or
interpretation of this letter.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|14. | Successors and Assigns. This letter shall be binding upon and inure to the benefit of and be enforceable by the Agent, the Tranche B Agent, the US Lenders, the US Borrowers
and the Obligors and their respective successors and assigns. The US Borrowers and the Obligors may not assign their respective rights under this letter without the prior written consent of the Agent, the Tranche B Agent and the US Lenders.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|15. | Partial Invalidity. If any provision of this letter is held to be invalid or unenforceable, such invalidity or unenforceability shall not invalidate this letter as a whole,
but this letter shall be construed as though it did not contain the particular provision held to be invalid or unenforceable and the rights and obligations of the parties shall be construed and enforced only to such extent as shall be permitted by
applicable law.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|16. | Acceptance. If the foregoing correctly sets out our agreement, please indicate your acceptance of this letter by signing below and returning an executed copy to us by no
later than 5:00 p.m. on April 2, 2009 (the Effective Date). If not so signed and returned to us on the Effective Date, this letter shall be null and void.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Yours truly,



|                                               |  |                    
|---------------------------------------------- |  | -------------------
|REVOLVING LENDER AND AGENT :                  
|                                              
|WACHOVIA CAPITAL FINANCE CORPORATION (CENTRAL)
|                                               | 
|By:                                            |  | /s/ Carmela Massari
|Name                                           |  | Carmela Massari    
|Title:                                         |  | Vice President     
|                                              
|                                              
|                                               | 
|By:                                            |  |                    
|Name:                                          |  |                    
|Title:                                         |  |                    



---

Page 11



Agreed this 2nd day of April 2009.



|                                      |  |                       
|------------------------------------- |  | ----------------------
|TRANCHE B LENDER AND TRANCHE B AGENT:
|                                     
|EXPORT DEVELOPMENT CANADA            
|                                      | 
|By:                                   |  | /s/ Kevin Skilliter   
|Name                                  |  | Kevin Skilliter       
|Title:                                |  | Senior Asset Manager  
|                                     
|                                     
|                                      | 
|By:                                   |  | /s/ Peter Johnston    
|Name:                                 |  | Peter Johnson         
|Title:                                |  | Loan Portfolio Manager



---

Page 12



Agreed this 2nd day of April 2009.



|                                             |  |                   |  |                                                 |  |        |  |                  
|-------------------------------------------- |  | ----------------- |  | ----------------------------------------------- |  | ------ |  | -----------------
|                                             |  |                  
|US BORROWER:                                 |  |                   |  | US BORROWER:                                   
|                                             |  |                  
|SMTC MANUFACTURING CORPORATION OF CALIFORNIA |  |                   |  | SMTC MANUFACTURING CORPORATION OF MASSACHUSETTS
|                                             |  |                   |  |                                                
|By:                                          |  | /s/ John Caldwell |  |                                                 |  | By:    |  | /s/ John Caldwell
|Name                                         |  | John Caldwell     |  |                                                 |  | Name   |  | John Caldwell    
|Title:                                       |  | President & CEO   |  |                                                 |  | Title: |  | President & CEO  
|                                             |  |                   |  |                                                
|By:                                          |  | /s/ Jane Todd     |  |                                                 |  | By:    |  | /s/ Jane Todd    
|Name:                                        |  | Jane Todd         |  |                                                 |  | Name:  |  | Jane Todd        
|Title:                                       |  | CFO & Secretary   |  |                                                 |  | Title: |  | CFO & Secretary  
|                                             |  |                   | 
|US BORROWER:                                 |  |                   |  |                                                 |  |       
|                                             |  |                   | 
|SMTC MEX HOLDINGS, INC.                      |  |                   |  |                                                 |  |       
|                                             |  |                   |  |                                                
|By:                                          |  | /s/ John Caldwell |  |                                                 |  |        |  |                  
|Name                                         |  | John Caldwell     |  |                                                 |  |        |  |                  
|Title:                                       |  | President & CEO   |  |                                                 |  |        |  |                  
|                                             |  |                   |  |                                                
|By:                                          |  | /s/ Jane Todd     |  |                                                 |  |        |  |                  
|Name:                                        |  | Jane Todd         |  |                                                 |  |        |  |                  
|Title:                                       |  | CFO & Secretary   |  |                                                 |  |        |  |                  



---

Page 13



OBLIGORS:

Each of the undersigned Obligors hereby:



| | (a) | acknowledges, confirms and agrees that such Obligors Financing Agreements (as each of the same may have been amended, modified, supplemented, extended, renewed, restated or
replaced) remain in full force and effect as at the date hereof in respect of the Obligations under the US Loan Agreement;
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | acknowledges and confirms that such Obligor has received a copy of the US Loan Agreement and this letter and understands and agrees to the terms thereof;
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------



| | (c) | acknowledges and confirms that the representations and warranties set forth in the Financing Agreements to which it is a party continue to be true and correct as of the date hereof;
and
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (d) | acknowledges and confirms that it is in compliance with the covenants set forth in the Financing Agreements to which it is a party as of the date hereof.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------

Dated as of the 2nd day of April, 2009.



|                   |  |                   |  |                                           |  |        |  |                  
|------------------ |  | ----------------- |  | ----------------------------------------- |  | ------ |  | -----------------
|                   |  |                  
|SMTC CORPORATION   |  |                   |  | SMTC HOLDINGS, LLC                       
|                   |  |                   |  |                                          
|By:                |  | /s/ John Caldwell |  |                                           |  | By:    |  | /s/ John Caldwell
|Name               |  | John Caldwell     |  |                                           |  | Name   |  | John Caldwell    
|Title:             |  | President & CEO   |  |                                           |  | Title: |  | President & CEO  
|                   |  |                   |  |                                          
|By:                |  | /s/ Jane Todd     |  |                                           |  | By:    |  | /s/ Jane Todd    
|Name:              |  | Jane Todd         |  |                                           |  | Name:  |  | Jane Todd        
|Title:             |  | CFO & Secretary   |  |                                           |  | Title: |  | CFO & Secretary  
|                   |  |                  
|HTM HOLDINGS, INC. |  |                   |  | RADIO COMPONENTES DE MEXICO, S.A. DE C.V.
|                   |  |                   |  |                                          
|By:                |  | /s/ John Caldwell |  |                                           |  | By:    |  | /s/ John Caldwell
|Name               |  | John Caldwell     |  |                                           |  | Name   |  | John Caldwell    
|Title:             |  | President & CEO   |  |                                           |  | Title: |  | President & CEO  
|                   |  |                   |  |                                          
|By:                |  | /s/ Jane Todd     |  |                                           |  | By:    |  | /s/ Jane Todd    
|Name:              |  | Jane Todd         |  |                                           |  | Name:  |  | Jane Todd        
|Title:             |  | CFO & Secretary   |  |                                           |  | Title: |  | CFO & Secretary  



---

Page 14



|                                |  |                   |  |  |  |  |  | 
|------------------------------- |  | ----------------- |  |  |  |  |  | 
|                                |  |                   | 
|SMTC DE CHIHUAHUA, S.A. DE C.V. |  |                   |  |  |  | 
|                                |  |                   |  | 
|By:                             |  | /s/ John Caldwell |  |  |  |  |  | 
|Name                            |  | John Caldwell     |  |  |  |  |  | 
|Title:                          |  | President & CEO   |  |  |  |  |  | 
|                                |  |                   |  | 
|By:                             |  | /s/ Jane Todd     |  |  |  |  |  | 
|Name:                           |  | Jane Todd         |  |  |  |  |  | 
|Title:                          |  | CFO & Secretary   |  |  |  |  |  | 





---

Page 15



SCHEDULE 2.3(b)(i)

TRANCHE B LOAN AMORTIZATION SCHEDULE



|                |  |                           
|--------------- |  | --------------------------
|                | 
|Date            |  | Principal Repayment Amount
|                | 
|April 1, 2009   |  | US$325,000                
|                | 
|July 1, 2009    |  | US$325,000                
|                | 
|October 1, 2009 |  | US$487,500                
|                | 
|January 1, 2010 |  | US$1,300,000              
|                | 
|April 1, 2010   |  | US$1,300,000              
|                | 
|July 1, 2010    |  | US$1,462,500              
|                | 
|October 1, 2010 |  | US$975,000                
|                | 
|January 1, 2011 |  | US$975,000                
|                | 
|April 1, 2011   |  | US$975,000                
|                | 
|July 1, 2011    |  | US$975,000                
|                | 
|October 1, 2011 |  | US$650,000                
|                | 
|January 1, 2012 |  | US$650,000                
|                | 
|April 1, 2012   |  | US$650,000                
|                | 
|August 12, 2012 |  | US$650,000                



---

SCHEDULE 8.6

FORM OF OFFICERS COMPLIANCE CERTIFICATE

FORM OF COMPLIANCE CERTIFICATE

This Compliance Certificate (this Certificate)is delivered to you pursuant to the Second Amended and Restated Canadian Loan Agreement
dated as of August 7, 2008, by and among SMTC MANUFACTURING CORPORATION OF CANADA, as Canadian Borrower, and WACHOVIA CAPITAL FINANCE CORPORATION (CANADA), as Revolving Lender and Agent, and the Second Amended and Restated US Loan Agreement
dated as of August 7, 2008 by and amongSMTC MANUFACTURING CORPORATION OF CALIFORNIA, SMTC MANUFACTURING CORPORATION OF MASSACHUSETTS, SMTC MEX HOLDINGS, INC., as US Borrowers, WACHOVIA CAPITAL FINANCE CORPORATION (CENTRAL), as Revolving
Lender and Agent, and EXPORT DEVELOPMENT CANADA, as Tranche B Lender and Tranche B Agent.



| | 1. | I am the duly elected, qualified and acting Senior Vice President Finance and Chief Financial Officer of the Borrowers and SMTC Corporation.
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------



| | 2. | I have reviewed and am familiar with the contents of this Certificate.
| | -- | ----------------------------------------------------------------------



| | 3. | I have reviewed the terms of the Canadian Loan Agreement and the US Loan Agreement referred to above.
| | -- | -----------------------------------------------------------------------------------------------------



| | 4. | Attached hereto as Attachmentis a certificate signed by me demonstrating compliance with the EBITDA covenants set forth in Section 8.19of the Canadian Loan
Agreement and Section 8.18 of the US Loan Agreement together with the financial statements used to determine such compliance.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 5. | Attached hereto as Attachment 2is a certificate signed by me demonstrating compliance with the Fixed Charge Coverage Ratio covenants set forth in Section 8.23
of the Canadian Loan Agreement and Section 8.22,of the US Loan Agreement together with the financial statements used to determine such compliance.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 6. | Attached hereto as Attachmentis a certificate signed by me demonstrating compliance with the Maximum Total Debt covenants set forth in Section 8.24of the
Canadian Loan Agreement and Section 8.23of the US Loan Agreement together with the financial statements used to determine such compliance.
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 7. | Attached hereto as Attachment 4is a certificate signed by me demonstrating compliance with the Maximum Unfunded Capital Expenditures covenants set forth in
Section 8.25of the Canadian Loan Agreement and Section8.24 of the US Loan Agreement together with the financial statements used to determine such compliance.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

IN WITNESS WHEREOF, I execute this Certificate this  day of
, 20.

SMTC CORPORATION

By:

Name: Jane Todd

Title: SVP Finance and CFO



2



---

|                                 |  |                 
|-------------------------------- |  | ----------------
|Company Name                     |  | 31/03/2009 15:41
|EBITDA Compliance Certificate    |  |                 
|For Month and YTD period ending: |  |                 



|                                               |  |                |  |           
|---------------------------------------------- |  | -------------- |  | ----------
|                                               |  | Monthly Actual |  | YTD Actual
|                                               |  |               
|Net income                                     |  |               |  |          
|                                               |  |               
|Plus: Interest                                 |  |               |  |          
|                                               |  |               
|Plus: Income taxes                             |  |               |  |          
|                                               |  |               
|Plus: Depreciation                             |  |               |  |          
|                                               |  |               
|Plus: Amortization                             |  |               |  |          
|                                               |  |               
|Less: Unusual gains             Detail below   |  |               |  |          
|                                               |  |               
|Plus: Unusual losses              Detail below |  |               |  |          
|                                               |  |               
|Plus: Stock option expenses                    |  |               |  |          
|                                               |  |               
|EBITDA                                         |  |               |  |          

Monthly rolling EBITDA



|                             |  |              |  |   |   
|---------------------------- |  | ------------ |  | - | --
|                             |  |             
|EBITDA for:                  |  | months ended |  | $ |  
|                             |  |             
|EBITDA for the month of:     |  |              |  |   |  
|                             |  |              |  |   |   
|                             |  |             
|Rolling month /QTR EBITDA at |  |              |  |   |   
|                             |  |             
|Standard                     |  |              |  |   |   
|                             |  |             
|Compliance                   |  |              |  |   | no



|          |  | 
|--------- |  | 
|          | 
|Name      |  | 
|          | 
|Signature |  | 
|          | 
|Title     |  | 
|          | 
|Date      |  | 



3



---

|                                                      |  |           
|----------------------------------------------------- |  | ----------
|Company Name                                          |  | XXXXXXXXXX
|FCCR Compliance Certificate                           |  |           
|For the period ending             X month ending date |  |           



|                                                                   |  |   |        
|------------------------------------------------------------------ |  | - | -------
|EBITDA for period ending:
                                    Date |  | $ |       
|Fixed Charges                                                      |  |   |       
|Pension Payments                                                   |  |   |       
|Capital Leases Payments                                            |  |   |       
|Interest Payments                                                  |  |   |       
|Unfunded Capital Expenditures                                      |  |   |       
|Maintenance Capex                                                  |  |   |       
|Cash Taxes                                                         |  |   |       
|Other                                                              |  |   |       
|Other                                                              |  |   |       
|Other                                                              |  |   |       
|                                                                   | 
|Total Fixed Charges                                                |  | $ |       
|                                                                   | 
|Fixed Charge Covenant Ratio                                        |  |   | #DIVIO!
|                                                                   | 
|Standard                                                           |  |   | 0      
|                                                                   | 
|Compliance                                                         |  |   | #DIV/O!



|          |  | 
|--------- |  | 
|          | 
|Name      |  | 
|          | 
|Signature |  | 
|          | 
|Title     |  | 
|          | 
|Date      |  | 



4



---

|                                       |  | 
|-------------------------------------- |  | 
|Company Name                           |  | 
|Debt/EBITDA minus Unfunded Capex Ratio |  | 
|Date                                   |  | 



|                       |  |         |  |         |  |         |  |        
|---------------------- |  | ------- |  | ------- |  | ------- |  | -------
|                       |  | 31-Mar  |  | 30-Jun  |  | 30-Sep  |  | 31-Dec 
|Revolver               |  |         |  |         |  |         |  |        
|Term (Current)         |  |         |  |         |  |         |  |        
|Leases (Current)       |  |         |  |         |  |         |  |        
|Term( LT)              |  |         |  |         |  |         |  |        
|Leases (LT)            |  |         |  |         |  |         |  |        
|Letters of credit      |  |        |  |         |  |         |  |        
|                       |  |         |  |        
|Total debt             |  |        |  |        |  |        |  |       
|                       |  |         |  |        
|EBITDA (4 QTR Rolling) |  |         |  |         |  |         |  |        
|                       |  |         |  |        
|Debt/EBITDA            |  | #D1V/O! |  | #DIV/O! |  | #DIV/O! |  | #D1V/O!
|                       |  |         |  |        
|Standard               |  | 6.9     |  | 5.2     |  | 4.4     |  | 3.6    
|                       |  |         |  |        
|Compliance             |  | #DIV/O! |  | #DIV/O! |  | #DIV/O! |  | #DIV/O!



|          |  | 
|--------- |  | 
|          | 
|Name      |  | 
|          | 
|Signature |  | 
|          | 
|Title     |  | 
|          | 
|Date      |  | 



5



---

|                        |  |                
|----------------------- |  | ---------------
|Company Name            |  | 3/31/2009 16:34
|Date                    |  |                
|Unfunded CAPEX Covenant |  |                



|                    |  |        |           |        |   |           |  |        |           |  |   |          
|------------------- |  | ------ | --------- | ------ | - | --------- |  | ------ | --------- |  | - | ---------
|                    |  | 31-Mar |           | 30-Jun |   | 30-Sep    |  | 31-Dec
|YTD CAPEX           |  |        |           |        |   |           |  |        |           |  |   |          
|YTD CAPEX financing |  |        |           |        |   |           |  |        |           |  |   |          
|                    |  |        |           |       
|YTD Unfunded CAPEX  |  | $      |          |        | $ |          |  | $      |          |  | $ |         
|                    |  |        |           |       
|Maximum             |  | $      | 1,000,000 |        | $ | 1,000,000 |  | $      | 1,000,000 |  | $ | 1,000,000
|                    |  |        |           |       
|Compliance          |  |        | YES       |        |   | YES       |  |        | YES       |  |   | YES      



|          |  | 
|--------- |  | 
|          | 
|Name      |  | 
|          | 
|Signature |  | 
|          | 
|Title     |  | 
|          | 
|Date      |  | 



5



---

Page 21



SCHEDULE 8.18

EBITDA CALCULATIONS



|                 |  |             |        |   |           |   |       |          |  |   |                     |   |                                 |   |           |  |   |       |  |   |      
|---------------- |  | ----------- | ------ | - | --------- | - | ----- | -------- |  | - | ------------------- | - | ------------------------------- | - | --------- |  | - | ----- |  | - | -----
|SMTC EBITDA(US$) |  | AActual2008 |        |   | BPlan2009 |   |       | C85%plan |  |   | DRolling 12-mth2009 |   | ERolling 12-mthadj non qtr mths |   | FCovenant
|Jan              |  | $           | (1,016 | ) |           | $ | (461  | )        |  | $ | (530                | ) |                                 | $ | 6,383     |  | $ | 5,883 |  | $ | 5,900
|Feb              |  |             | 30     |   |           |   | 107   |          |  |   | 91                  |   |                                 |   | 6,444     |  |   | 6,194 |  |   | 6,200
|Mar              |  |             | 3,316  |   |           |   | 347   |          |  |   | 295                 |   |                                 |   | 3,423     |  |   | 3,423 |  |   | 3,400
|Apr              |  |             | (475   | ) |           |   | 233   |          |  |   | 198                 |   |                                 |   | 4,096     |  |   | 3,366 |  |   | 3,400
|May              |  |             | 107    |   |           |   | 466   |          |  |   | 396                 |   |                                 |   | 4,385     |  |   | 4,135 |  |   | 4,200
|Jun              |  |             | 1,300  |   |           |   | 698   |          |  |   | 593                 |   |                                 |   | 3,678     |  |   | 3,678 |  |   | 3,700
|Jul              |  |             | (950   | ) |           |   | 360   |          |  |   | 306                 |   |                                 |   | 4,934     |  |   | 4,204 |  |   | 4,200
|Aug              |  |             | 1,187  |   |           |   | 600   |          |  |   | 510                 |   |                                 |   | 4,257     |  |   | 4,007 |  |   | 4,000
|Sep              |  |             | 1,212  |   |           |   | 693   |          |  |   | 589                 |   |                                 |   | 3,634     |  |   | 3,634 |  |   | 3,700
|Oct              |  |             | (589   | ) |           |   | 390   |          |  |   | 332                 |   |                                 |   | 4,555     |  |   | 3,816 |  |   | 3,800
|Nov              |  |             | 371    |   |           |   | 394   |          |  |   | 335                 |   |                                 |   | 4,519     |  |   | 4,269 |  |   | 4,300
|Dec              |  |             | 1,404  |   |           |   | 759   |          |  |   | 645                 |   |                                 |   | 3,760     |  |   | 3,760 |  |   | 3,800
|Total            |  | $           | 5,897  |   |           | $ | 4,586 |          |  | $ | 3,760               |   |                                 | $ | 3,760     |  | $ | 3,760 |  | $ | 3,800
|                 |  |             |        |   |           |  
|Per 2008 10 K    |  | $           | 5,897  |   |           |   |       |          |  |   |                     |   |                                 |   |           |  |   |       |  |   |      
|                 |  |             |        |   |           |  
|Jan 2010         |  |             |        |   |           | $ | 390   |          |  | $ | 332                 |   |                                 | $ | 4,680     |  | $ | 4,180 |  | $ | 4,200
|Feb 2010         |  |             |        |   |           |   | 394   |          |  |   | 335                 |   |                                 |   | 4,983     |  |   | 4,733 |  |   | 4,700
|Mar 2010         |  |             |        |   |           |   | 759   |          |  |   | 645                 |   |                                 |   | 5,447     |  |   | 5,447 |  |   | 5,500

Note:

If financial covenant is not reset by April 10, 2010, April test will be FCCR 1.25:1

Column A represents actual EBITDA for 2008 retrieved from client's projection model and total matched to 2008 10K

Column B represents EBITDA per 2009 projections

Column C represents 85% of 2009 projected EBITDA

Column D represents rolling EBITDA (A and C)

Column E is the same as D except that non-qtr month ends are lower than in DQTR end periods are equal

Column F covenant ( rounded)