M20-9763542 Equivalent & Substitute Parts

Part Overview

The M20-9763542 is a vertical rectangular connector header manufactured by Harwin Inc., featuring 70 positions at 2.54mm pitch with through-hole solder termination. This connector is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design and procurement requirements. The part operates across the -40°C to 105°C temperature range and is rated for 3A per contact with UL94 V-0 flammability compliance.

Key Parameters

Parameter	M20-9763542 Specification
Manufacturer	Harwin Inc.
Number of Positions	70
Pitch - Mating	0.100" (2.54mm)
Number of Rows	2
Connector Type	Header, Cuttable
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Contact Material	Brass
Contact Finish - Mating	Gold
Contact Finish - Post	Tin
Operating Temperature	-40°C ~ 105°C
Current Rating	3A per Contact
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

Primary Matching Criteria:

Number of Positions: 70 (exact match required)
Pitch - Mating: 0.100" (2.54mm) (exact match required)
Number of Rows: 2 (exact match required)
Contact Type: Male Pin (exact match required)
Mounting Type: Through Hole (exact match required)
Termination: Solder (exact match required)
Fastening Type: Push-Pull (exact match required)
Material Flammability Rating: UL94 V-0 (exact match required)

Secondary Compatibility Parameters:

Operating Temperature range must encompass or equal the original specification
Current Rating must meet or exceed 3A per contact
Contact Shape: Square (exact match required)
Insulation Height: 0.100" (2.54mm) (exact match required)
Row Spacing - Mating: 0.100" (2.54mm) (exact match required)

All substitute parts listed below satisfy these criteria. Variations in contact finish, contact material, and overall contact length are permissible within the scope of board-to-board or cable connection applications, provided electrical and mechanical interfaces remain compatible.

Parameter Comparison

Parameter	M20-9763542	M20-9763642	0702871082	2370-6221-TG	77313-122-70LF	77313-124-70LF	77313-127-70LF	77313-422-70LF	77313-424-70LF	77313-427-70LF	77313-822-70LF
Manufacturer	Harwin Inc.	Harwin Inc.	Molex	3M	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Number of Positions	70	72	70	70	70	70	70	70	70	70	70
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Connector Type	Header, Cuttable	Header, Cuttable	Header, Breakaway	Header	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Kinked Pin, Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Tin	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Tin	Tin	Tin	Gold or Gold, GXT™
Contact Finish - Post	Tin	Tin	Tin	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Contact Material	Brass	Brass	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)	0.090" (2.29mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	Not specified	-55°C ~ 105°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C
Current Rating	3A per Contact	3A per Contact	Not specified	3A	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Harwin Equivalent: M20-9763642 is the active Harwin equivalent, featuring identical electrical and mechanical specifications with the exception of 72 positions versus 70. This part maintains ROHS3 compliance and active product status, making it the preferred choice for designs requiring Harwin continuity.

Multi-Manufacturer Alternatives: The Amphenol ICC (FCI) BERGSTIK® series parts (77313-122-70LF, 77313-124-70LF, 77313-127-70LF, 77313-422-70LF, 77313-424-70LF, 77313-427-70LF, 77313-822-70LF) provide exact 70-position matching with extended operating temperature ranges (-65°C to 130°C) and RoHS compliance. These parts differ in contact length and finish specifications but maintain electrical compatibility.

Molex Alternative: The 0702871082 (C-Grid 70287 series) matches the 70-position, 2.54mm pitch specification with ROHS3 compliance. Insulation height is 0.090" (2.29mm) versus the original 0.100" (2.54mm), requiring mechanical clearance verification in the application.

3M Alternative: The 2370-6221-TG (2300 series) provides 70-position, 2.54mm pitch compatibility with extended temperature range (-55°C to 105°C). This part carries RoHS non-compliant status and REACH Affected designation, requiring regulatory assessment for applications subject to environmental compliance mandates.

Compliance Considerations: For applications requiring ROHS3 compliance, M20-9763642, 0702871082, and all Amphenol ICC BERGSTIK® variants are suitable. The 2370-6221-TG should be excluded from RoHS-regulated designs.

Frequently Asked Questions (FAQ)

Q: Can M20-9763642 directly replace M20-9763542 despite the 72-position versus 70-position difference?

A: M20-9763642 maintains identical pitch, row spacing, contact type, and electrical ratings. The two additional positions do not affect compatibility with designs using 70 positions, as the extra positions remain unpopulated. Mechanical fit and PCB layout must accommodate the increased overall connector length.

Q: What is the significance of contact length variations among substitute parts?

A: Contact length determines mating depth and stacking height. Variations in contact length (ranging from 0.228" to 0.320" mating length) affect the overall connector profile and may impact board-to-board spacing or cable routing. Verify that the selected substitute accommodates the application's physical constraints.

Q: Are Amphenol ICC BERGSTIK® parts with tin finish (77313-422-70LF, 77313-424-70LF, 77313-427-70LF) electrically equivalent to gold-finish variants?

A: Yes. Contact finish differences (gold versus tin) do not affect electrical performance for standard signal and power applications. Tin-finish parts provide cost reduction while maintaining 3A per contact current rating and UL94 V-0 flammability compliance. Material selection should consider corrosion resistance requirements in the specific application environment.

Q: Why does the Molex 0702871082 have a reduced insulation height of 0.090" (2.29mm)?

A: The 0.090" insulation height is a design characteristic of the Molex C-Grid 70287 series. This dimension must be verified against PCB layout and connector cavity specifications to ensure mechanical compatibility. The reduced height may affect stacking configurations or board-to-board spacing.

Q: Is the 2370-6221-TG suitable for new designs?

A: The 2370-6221-TG is electrically and mechanically compatible but carries RoHS non-compliant and REACH Affected designations. For new designs subject to environmental compliance requirements (EU RoHS Directive, REACH regulations), this part is not recommended. Use ROHS3-compliant alternatives such as M20-9763642 or Amphenol ICC BERGSTIK® variants.

Q: What is the difference between cuttable and breakaway connector types?

A: Cuttable connectors (M20-9763542, M20-9763642) allow individual pins to be separated by cutting. Breakaway connectors (Molex, Amphenol ICC variants) feature pre-scored sections for controlled separation. Both types maintain identical electrical and mechanical performance; selection depends on assembly and customization requirements.

Q: Can substitute parts with extended temperature ranges (-65°C to 130°C) be used in applications rated only to -40°C to 105°C?

A: Yes. Extended temperature range capability exceeds the original specification and provides additional design margin. No performance degradation occurs when operating within the original temperature envelope. This substitution is appropriate for applications requiring future temperature range expansion or enhanced reliability margins.

Q: Are there packaging differences among substitute parts that affect procurement?

A: Yes. Packaging varies between bulk, bag, and tape formats. M20-9763642 is supplied in bulk packaging, while Amphenol ICC BERGSTIK® parts are supplied in bag packaging. Packaging selection affects handling, storage, and automated assembly compatibility. Verify packaging requirements with manufacturing and assembly processes.

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