**Exhibit 31.2**

 

**CERTIFICATIONPURSUANT TO**

**RULE 13a-14(a) AND15d-14(a) OF THE SECURITIES AND EXCHANGE ACT OF 1934**

**AS ADOPTED PURSANT TO SECTION 302 OF THESARBANES-OXLEY ACT OF 2002**

 

I, Greg Haugen, certify that:

 

1.               I have reviewed this report on Form 10-Qof Advanced Power Technology, Inc.; 

 

2.               Based on my knowledge, this report doesnot contain any untrue statement of a material fact or omit to state a materialfact necessary to make the statements made, in light of the circumstances underwhich such statements were made, not misleading with respect to the periodcovered by this report; 

 

3.               Based on my knowledge, the financialstatements, and other financial information included in this report, fairlypresent in all material respects the financial condition, results of operationsand cash flows of the registrant as of, and for, the periods presented in thisreport; 

 

4.               The registrant’s other certifyingofficers and I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e) for the registrant and have: 

 

a)              Designedsuch disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidatedsubsidiaries, is made known to us by others within those entities, particularlyduring the period in which this report is being prepared; 

b)             Evaluatedthe effectiveness of the registrant’s disclosure controls and procedures andpresented in this report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by thisreport based on such evaluation; and 

c)              Disclosedin this report any change in the registrant’s internal control over financialreporting that occurred during the registrant’s most recent fiscal quarter (theregistrant’s fourth fiscal quarter in the case of an annual report) that hasmaterially affected, or is reasonably likely to materially affect, theregistrant’s internal control over financial reporting; and 

 

5.               The registrant’s other certifyingofficers and I have disclosed, based on our most recent evaluation of internalcontrol over financial reporting, to the registrant’s auditors and the auditcommittee of registrant’s board of directors: 

 

a)              Allsignificant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely toadversely affect the registrant’s ability to record, process, summarize andreport financial information; and 

b)             Anyfraud, whether or not material, that involves management or other employees whohave a significant role in the registrant’s internal control over financial reporting.

 

 
|   |   |   | By:                                         | /S/ GREG  HAUGEN |   |
|--------|--------|--------|---------------------------------------------|------------------|--------|
|   |   |   | Vice  President, Finance and Administration |
|   |   |   | Chief  Financial Officer and Secretary      |
|   |   |   | (Principal  Financial Officer)              |
|   |   |   | August 11,  2003                            |

 

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