High Speed 0.8mm pitch Board to Board Connectors

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

FX18 Series

Design Guide Line
OCT, 2014© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

FX18 Design Guide Line

Revision 0.1
page - 2 - of 28- Table of Contents 1. Preface………………………………

3………………………………

4-6………………………………

7-22………………………………

23-25

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

1-1 Purpose
1-2 Scope

2. Product information
2-1 Basic Specifications
2-2 Ordering Information
2-3 Connection Types & Dimension Drawings
2-4 MF Contact Structure

3. Connector Mounting
3-1 Absorption Area
3-2 Recommended Temperature Profile
3-3 Recommended Land Pattern
3-4 MF Contact Lead Reflow
3-5 Recommended Metal Mask Layout
3-6 Contact Mounting Status Check Criteria
3-7 Mounting of Multiple Connectors
3-8 Soldering Repair Procedure

4. Requirements
4-1 Requirements on Mating

4-2 Requirements on Rotating Insertion and Withdrawal (TADC4-210630)
4-3 Recommended Spacer Dimensions (Stacking Connection Type)

5. Caution………………………………

5-1 Use of Interposers
5-2 Allowable Clearance between the Mated Pair

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

26-27

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1. Preface
1-1

Purpose

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

The FX18 Series Instruction Manual is intended to provide information on basic features of the
FX18 Series and the method of use, as well as to provide information on the method of designing
products efficiently and improving the assembling process when the FX18 Series is used.
Hirose expects that this Instruction Manual will significantly contribute to your productdevelopment, quality, and cost reduction of the entire system.
Because this Instruction Manual intends only to provide general information, it does not restrict
your design and does not guarantee results in all circumstances.
If there is anything that does not conform to the description in this Instruction Manual, consult us
for alternative solutions individually.

1-2

Scope

This Instruction Manual provides useful information for the product using the FX18 Series.
It describes the basic connector design information, recommended board dimensions,and requirements.
This Instruction Manual will be revised on a continuing basis as technical and manufacturing
capability is changed.

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

2. Product Information
2-1 Basic Specifications○ 0.8mm pitch○ High-speed transmission compliant○ Connection type: Coplanar, vertical, stacking (stacking height: 10 to 45mm)○ Number of contacts: 40/60/80/100/120/140○ Multi-functional contacts (MF contacts) that can be used for a variety of applications○ Signal contact (Effective contact length: 2mm)
○ Enhanced wrenching strength due to DIP connection of MF contacts○ Excellent mating self-alignment performance by a large guide shape(mating self-alignment range: ±1mm)
2-2 Ordering Information● Right Angle Receptacle
FX18−60 S−0 .8 SH(1) (2) (3) (4) (5)● Right Angle Header
FX18−60 P−0. 8 SH
(1)(2)(3) (4) (5)● Straight Receptacle
FX18−60 S−0. 8 SV 15(1) (2) (3) (4) (5) (6)● Interposer
FX18−60 PS−0. 8 H 15(1) (2) (3) (4) (5)(6)● Straight Header
FX18−60 P−0. 8 SV 10(1)(2)(3) (4) (5) (6)(1) Series name

: FX18(2) Number of contacts(3) Connector type

S : Receptacle
P : Header
PS : Interposer Type

(4) Contact pitch: 0.8 mm(5) Product ShapeSH : Right-Angle TypeSV : Straight TypeH : Interposer Type

(6) Stacking Height Type© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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2-3 Connection Types & Dimension Drawings[Coplanar connection type][Vertical connection type]
FX18-**P-0.8SH

FX18-**P-0.8SV
15.15

9.5
10.85

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

20.3

2.5

2.5
FX18-**S-0.8SH

FX18-**S-0.8SH[Stacking connection type]
Common to connectors

2.5

5.25

Common to connectors

FX18-**P-0.8SV
FX18-**P-0.8SV10
FX18-**PS-0.8H15
FX18-**S-0.8SV20
FX18-**S-0.8SV15
FX18-**S-0.8SV1010mm 15mm 20mm 25mm 30mm 35mm

20mm 25mm 30mm 35mm 40mm 45mm

Common to mounting patterns

Common to mounting patterns© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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2-4 MF Contact Structure (Example: Coplanar Connection Type)On the guide posts on both sides of the connector, two rows of multi-functional (MF)contacts are placed for the following uses.

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

* The vertical connection and stacking connection types also have the same product configuration.

1. Enhancing ground connection between boards
2. Using as a power line (3A/line)
3. Three-step sequence structure including signal contacts.
Signal contact

MF contact A
MF contact B

Note: One contact can have only one function.
Example: If an MF contact is used as a power contact,
it cannot be further used as a detection contact.

[Image of three-step sequence structure]
First step contact
GroundingSecond step contact
Signal contact

Receptacle

Third step contact
Detecting

Mating(Effective mating length)

Signal contacts(2.0mm)(1.5mm)(2.5mm)

2.0mm

2.5mm

1.5mm
MF contact B

MF contact A

Header: Contact© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 20140mm

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3. Connector Mounting
3-1 Absorption Area
When performing automatic mounting, see the following absorption area as reference.
For the straight type, absorption tape is attached.

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

[Right Angle Type]

10mmMAX

10mmMAX[Straight Type]

Absorption
tape length
10mmMIN

Absorption
tape length
10mmMIN© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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3-2 Recommended Temperature Profile
Mounting temperature profile (reference)(Reflow setting condition)
・BoardDimensions: 110 x 50 x 1.6mm

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

Material: FR-4
・Solder paste composition Sn-3Ag-0.5Cu (flux content: 11wt%)
・Metal mask thickness

t=0.12mm

90 to 120s

Note 1: This temperature profile is a reference value.
Note 2: Up to two cycles of reflow process are permitted.
Note 3: The actual temperature may vary depending on the solder paste type and volume.

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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3-3

Recommended Land Pattern Dimension of PCB (PCB Thickness：1.6mm)[FX18-**P-0. 8SH / FX18-**S-0. 8SH]

Through hole size is reduced at □ in order to stabilize theconnector to PCB and prevent connector mis-position androtation during mounting process.

Dimensions for both of MF contact A and B

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

are symmetry with the center line.

MF contact A

Unit:[mm]No. of pos
40
60
80
100
120
140

MF contact B

A
15.2
23.2
31.2
39.2
47.2
55.2

B
18.4
26.4
34.4
42.4
50.4
58.4

C
24.65
32.65
40.65
48.65
56.65
64.65

Maximum allowable rotational angle of theconnector after mounting by using therecommended pattern layout to be 0.2°.

Dimension from PCB end［FX18-**P-0. 8SV］
Dimensions for both of MF contact A and B
are symmetry with the center line.

Unit:[mm]MF contact A

No. of pos
40
60
80
100
120
140

MF contact B

A
15.2
23.2
31.2
39.2
47.2
55.2

B
18.4
26.4
34.4
42.4
50.4
58.4

C
24.65
32.65
40.65
48.65
56.65
64.65

Maximum allowable rotational angle of theconnector after mounting by using therecommended pattern layout to be 0.2°.

PCB end© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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Through hole size is reduced at □ in order to stabilize the［FX18-**P-0. 8SV10］

connector to PCB and prevent connector mis-position androtation during mounting process.

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

Unit:[mm]No. of pos
40
60
80
100
120
140

MF contact A

A
15.2
23.2
31.2
39.2
47.2
55.2

B
18.4
26.4
34.4
42.4
50.4
58.4

C
24.65
32.65
40.65
48.65
56.65
64.65

Maximum allowable rotational angle of theconnector after mounting by using therecommended pattern layout to be 0.2°.
Dimensions for MF contact A is line symmetry
and MF contact B is point symmetry.
MF contact B

PCB end[FX18-**S-0. 8SV15 / FX18-**S-0. 8SV20]

Unit:[mm]No. of pos
40
60
80
100
120
140

A
15.2
23.2
31.2
39.2
47.2
55.2

B
18.4
26.4
34.4
42.4
50.4
58.4

C
26.05
34.05
42.05
50.05
58.05
66.05

MF contact A

Maximum allowable rotational angle of theconnector after mounting by using therecommended pattern layout to be 0.2°.

Dimensions for MF contact A is line symmetry
and MF contact B is point symmetry.
MF contact B

PCB end© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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3-4 Intrusive Reflow of MF Contacts (Stencil Design)
Intrusive reflow applied to MF contacts of FX18 is that the solder paste around the through holes
flows into the through holes. Please refer to this guideline prior to your stencil design.
This guideline is based on our evaluation results under certain conditions, and it does not cover
all the soldering and reflow conditions. Therefore, prior confirmation of solder and reflow conditions
according to this guideline as reference is highly recommended.

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

【Intrusive Reflow Process】①PCB②Solder Paste Printing

Solder paste to fill in thethrough holes(Printed around the holes)③Place the connector onto the pattern⑤Complete④Reflow

Solder paste around the holes
flows into each through hole.

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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Recommended Pattern Layout / Reference Stencil Design
Example: Right Angel Header / Receptacle

Example: Straight Header(FX18-P-0.8SH / FX18-S-0.8SH)

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

0.9(FX18-P-0.8SV)

Pattern [1] for MF contact A

Pattern for MF contact B

0.9

Pattern for MF contact B
Pattern [1] for MF contact A

PCB end

PCB endPattern [2] for MF contact A
Pattern [2] for MF contact A＊) Pattern herein refers to the solder printing area.

＜Note＞
1. Reference stencil design is designed on the condition that the recommended pattern layout is applied forreflow.
2. Avoid excessive solder flow into through holes, or solder bridge could occur.
3. Keep the distance 0.9 mm or more between the pattern for signal contact and that of MF contact B, or solder
bridge on signal contact or solder shortage on MF contact B caused by excessive solder supply to signal
contact from MF contact B, could occur.
4. Pattern area of MF contact A/B should be solid with copper foil layer with resist pattern coating etc.
In case of PCB with patterns across solder printed area and/or via holes, PCB surface becomes unflat, andball-shaped solder paste could remain on the PCB, inducing solder shortage.
For the reasons set forth above, hatched area shown in the following pages shall be flat surface as well.
5. Necessary solder amount is specified in the next page.
In case that through hole dia., PCB thickness do not meet this guideline, solder amount will change.
6. Specified solder amount is applicable for solder paste indicated in the next page.
Please note that solder amount could change depending on the solder paste composition.

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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3-5

Reference Stencil Design

Stencil Thickness (Reference) : 0.12mm【Solder Paste】
Manufacturer：Senju metal industry

TYPE：M705-GRN360-K2-V

Material：Sn96.5/Ag3.0/Cu0.5 Flux is contained by 11.5%

Right Angel Header / Receptacle(Example：FX18-60P-0.8SH / FX18-60S-0.8SH)

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

[Solder amount]・Signal contact
・MF contact B
・MF contact A [1]・MF contact A [2]0.1mm3 / (per pattern)
3.21mm3

Amount for our recommended PCB layout

3.23mm3
2.67mm3
0.9

Pattern [1] for MF contact A

0.9
Pattern for MF contact B

PCB end

A: Pattern for signal contacts

Pattern [2] for MF contact A

A: Pattern for signal contacts (Details)

B: Pattern for MF contacts

B: Pattern for MF contacts (Details)© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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Straight Header(Example：FX18-60P-0.8SV)[Solder amount]・Signal contact
・MF contact B
・MF contact A [1]

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

・MF contact A [2]0.1mm3 / (per pattern)
3.21mm3

Amount for our recommended PCB layout

2.88mm3
1.76mm3
0.9

0.9
Pattern [1] for MF contact A
Pattern for MF contact B

Pattern [2] for MF contact A
C: Pattern for signal contacts

PCB end
D: Pattern for MF contacts

C: Pattern for signal contacts (Details)

D: Pattern for MF contacts (Details)© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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Straight Header (Example：FX18-60P-0.8SV10)[Solder amount]・Signal contact
・MF contact B
・MF contact A [1]・MF contact A [2]0.1mm3 / 1 (per pattern)
3.19mm3

Amount for our recommended PCB layout

3.19mm3
2.14mm3

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

0.9
0.9
Pattern [1] for MF contact A
Pattern for MF contact B

Pattern [2] for MF contact A
E: Pattern for signal contacts

PCB end

F: Pattern for MF contacts

E: Pattern for signal contacts (Details)

F: Pattern for MF contacts (Details)© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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Straight Receptacle (Example：FX18-60S-0.8SV15 / FX18-60S-0.8SV20)[Solder amount]・Signal contact
・MF contact B
・MF contact A [1]

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

・MF contact A [2]0.1mm3 / (per pattern)
3.19mm3
Amount for our recommended PCB layout

3.19mm3
2.14mm3

0.9
0.9

Pattern [1] for MF contact A

Pattern for MF contact B

Pattern [2] for MF contact A
G: Pattern for signal contacts

PCB end

H: Pattern for MF contacts

G: Pattern for signal contacts (Details)

H: Pattern for MF contacts (Details)© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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3-6 MF Contact Mounting Status Check Criteria
The judgment criteria for mounting at the MF contact of the FX18 is shown below.

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

[Places at which mounting status is checked] Common to FX18 Seriesor◆Are fillets formed on theconnector-mounted face?

◆When viewed from the rear side,
are the through-holes filled withsolder without clearance?

[Judgment example]◆Pass productor◆Fail product&

Fillets are not formed

Not filled with solder© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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3-7 Mounting of Multiple Connectors
Note that multiple connectors of the FX18 Series cannot be mounted on one board.
Permitted board designs are shown in the next section.

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

<Not allowed>

Vertical connection type

Coplanar connection type

Stacking connection type

■ Two or more connectors are used on one board<Permitted>

Vertical connection type

Coplanar connection type

Stacking connection type■ Boards are separated

Stacking connection type■ Boards are separated (when stacking types with different heights are used)© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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3-8 Soldering Repair Procedure

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

If a soldering defect such as insufficient solder or solder bridge occurs when reflowing an FX18 Seriesconnector, there are cases where it can be repaired. Its procedure is shown below as reference.
[Required equipment]
・Soldering iron (a product with a bit temperatureadjustment function is recommended)
・Fixing jig of the repair target board

Equipment used in this document[Required consumables]
・Solder absorbent wire (solder wick wire)・Lead-free wire solder (φ0.2mm)
Soldering iron FX-951 (Hakko Corporation)
Shape of soldering iron bit: T12-B2[Work procedure](1) Fix the repair target board with a fixing jig to facilitate repair work.
For the inner contacts of the FX18-**P/S-0.8SH, the leads of the contacts are placed in a recessed position.
Therefore, fixing the board with about 45 degrees tilted makes repair work easier.

(2) Perform repair work. For the detailed work method, follow the steps in the subsequent sections.

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

FX18 Design Guide Line

Revision 0.1
page - 20 - of 28[When a bridge is formed <when the volume of solder is large>]
If a bridge is formed between adjacent leads due to excess solder,use a commercially available solder absorbent wire (solder wick wire).

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

[Detailed work procedure](1) Place a solder absorbent wire on the bridged portion.

(2) Place the soldering iron on the solder absorbent wire lightly and(3) Slide the iron bit and the absorbent wire toward you at the same time promptly
while absorbing excess solder.

(4) Repair work is completed.
Caution!

○ Take care not to cause thermal deformation of the housing and deformation of leads.
○ After repair work is completed, check that sufficient soldering fillets are formed.
○ For the operating condition and iron bit shape, make an adjustment in accordance with the situation.
(Reference work condition) Iron bit temperature: 350 °C, Iron bit contact time: 3 seconds© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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Revision 0.1
page - 21 - of 28[When a bridge is formed <when the volume of solder is small>]If excess solder is small, there are cases where the bridge can be removed without using a solder
absorbent wire.

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

[Detailed work procedure](1) Place the iron bit directly on the bridged portion.
(2) Slide the iron bit toward you promptly.

(3) Repair work is completed.
Caution!

○ Take care not to cause thermal deformation of the housing and deformation of leads.
○ After repair work is completed, check that sufficient soldering fillets are formed.
○ For the operating condition and iron bit shape, make an adjustment in accordance with the situation.
(Reference work condition) Iron bit temperature: 350 °C, Iron bit contact time: 2 seconds© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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page - 22 - of 28[Insufficient solder]
When there is a place where no solder is applied partially as
shown in the photograph at right, use commercially available
lead-free wire solder (φ 0.2mm).

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

[Detailed work procedure](1) Place the iron bit directly between the lead where no solder is applied and the board pad.
(The work target in the photo is the place at right where no solder is applied.)(2) Add an appropriate amount of wire solder by pouring it.

(3) Repair work is completed.
Caution!

○ Take care not to cause thermal deformation of the housing and deformation of leads.
○ After repair work is completed, check that sufficient soldering fillets are formed.
○ For the operating condition and iron bit shape, make an adjustment in accordance with the situation.
(Reference work condition) Iron bit temperature: 350 °C, Iron bit contact time: 3 seconds(including the time required for pouring solder)© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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4. Requirements
4-1 Requirements on Mating(1) Requirements on self-alignment range (in the worst case)
Width direction
self-alignment range (one side): 0.7mm(2) Requirements on mating status (in the worst case)Mating backlash in the width direction(one side): 0.015mm

Mating backlash in the longitudinal
direction (one side): 0.015mm

Mating tilt in the longitudinal direction:
1 degree max.

Mating clearance: 1mm max.

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

Longitudinal direction
self-alignment range (one side): 1.1mm

Mating tilt in the longitudinal direction:
0.5 degrees max.

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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4-2 Requirements on Rotating Insertion and Withdrawal (TADC4-210630)
When using a connector in rotating mating, design the housing while taking the following into account.
(1) Set the location of the mating rivet within the following dimensions.
Rotating rivet

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

5 ± 1 mm(1.75mm)

FX18-**S-0.8SV**
FX18-**S-0.8SH

50mm or more
FX18-**P-0.8SV**
FX18-**P-0.8SH

Rotating rivet dimension requirement(2) For rotating insertion and withdrawal in this requirement, the contact timing in three-step sequence is as follows:
Contact step 1: Contact at MF contact A

Contact step 2: Contact at signal contact

Contact at signal
contact

Contact at MF contact A(2.1°)(2.8°)

Contact step 3: Contact at MF contact B
Contact at MF contact B(1.1°)(3) Float either or both of the connectors to prevent excess wrenching strength from being applied when mating
connectors or design the housing structure that ensures smooth mating by allowing a play in the mating rivet.
(4) Set the final mating state by referencing "Requirements on Mating."(5) The board and housing cannot be supported only with connectors.
It is necessary to take measures to fix the housing on the housing side (complete lock structure, etc.).

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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4-3 Recommended Spacer Dimensions (Stacking Connection Type)Be sure to use a spacer between boards using the FX18 Series stacking type connectors so that load
is not applied to the solder joint parts and connectors.

[When two pieces are used]
StackingheightSep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

Recommended spacer

Plug/receptacle product nameheight dimensions

10 mm

FX18-**P-0.8SV/FX18-**S-0.8SV10

10.3 ± 0.127 mm

15 mm

FX18-**P-0.8SV/FX18-**S-0.8SV15

15 ± 0.127 mm

20 mm

FX18-**P-0.8SV/FX18-**S-0.8SV20

20 ± 0.127 mm

20 mm

FX18-**P-0.8SV10/FX18-**S-0.8SV10

20.3 ± 0.127 mm

25 mm

FX18-**P-0.8SV10/FX18-**S-0.8SV1525 ± 0.127 mm

30 mm

FX18-**P-0.8SV10/FX18-**S-0.8SV20

30 ± 0.127 mm[When three pieces are used]
Stacking

Recommended spacer

plug

Interposer

Receptacle

25 mm

FX18-**P-0.8SV

FX18-**PS-0.8H15

FX18-**S-0.8SV10

25.3 ± 0.127 mm

30 mm

FX18-**P-0.8SV

FX18-**PS-0.8H15

FX18-**S-0.8SV1530 ± 0.127 mm

35 mm

FX18-**P-0.8SV

FX18-**PS-0.8H15

FX18-**S-0.8SV20

35 ± 0.127 mm

35 mm

FX18-**P-0.8SV10

FX18-**PS-0.8H15

FX18-**S-0.8SV10

35.3 ± 0.127 mm

40 mm

FX18-**P-0.8SV10

FX18-**PS-0.8H15

FX18-**S-0.8SV1540 ± 0.127 mm

45mm

FX18-**P-0.8SV10

FX18-**PS-0.8H15

FX18-**S-0.8SV20

45 ± 0.127 mm

heightheight dimensions

Plug
Plug
Interposer

SpacerReceptacle

When two pieces are used

Receptacle
When three pieces are used

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

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5. Caution
5-1 Use of Interposers

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

An interposer is equipped with a simple locking device to improve the mating strength. It is designed
to be always left on the receptacle side when the header is removed away.

Simple locking device[Insertion and withdrawal side]
Header: Male contact
Interposer: Female contact

Interposer is
P/S type[Fixed side]
Interposer: Male contact
Receptacle: Female contact

Before using the interposer, read the following caution.
(1) Because the mating fixed side is equipped with a simple lock, it is not removed easily.
The number of times of insertion and withdrawal should not exceed five times.
(2) When mating connectors, be sure to mate the mating fixed side first, and then mate the insertion andwithdrawal side.
(3) Only for the insertion and withdrawal side, the effective mating length of each contact is 2.5mm for an
MF contact A, 2mm for a signal contact, and 1.5mm for an MF contact B.
(4) For the allowable clearance between the mated pair, zero on the mating fixed side and 1mm or less only
on the insertion and withdrawal side.

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

FX18 Design Guide Line

Revision 0.1
page - 27 - of 28

5-2 Allowable Clearance between the Mated Pair
The effective mating length of each contact is 2.5mm for an MF contact A, 2mm for a signal contact,and 1.5mm for an MF contact B. (*1)
Make certain that the clearance between the header and the receptacle at the time of mating does not[Coplanar connection type][Vertical connection type]
1mm or less

1mm or less

1mm or less

[Stacking connection type (three pieces)][Insertion and withdrawal side][Stacking connection type (two pieces)]

1mm or less[Fixed side]

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

exceed 1mm.

(* 1) Because the effective mating length is set to 1.5mm for an MF contact A, 1mm for a signal
contact, and 1mm for an MF contact B only on the interposer fixed side, there is no allowable
clearance between the mated pair on the mating fixed side.

© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014

FX18 Design Guide Line

Revision 0.1
page - 28 - of 28

Sep.1.2024 Copyright 2024 HIROSE ELECTRIC CO., LTD. All Rights Reserved.

FX18 Series Design Guide Line
Version number

0.1

Prepared by

PCC Asao

Reviewed by

PCC Yamaguchi

Approved by

PCC Okawa

Revision history
Revision

Date

Handled byComments

0.1

Oct 7, 2014

PCC AsaoFirst edition© 2014, HIROSE ELECTRIC CO., LTD. All rights reserved.
OCT, 2014