Harwin M20-9741942 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9741942 is a rectangular connector header, right-angle mounted, with 38 positions at 2.54mm pitch. This through-hole component features a cuttable design with male pins, gold-plated mating contacts, and tin-plated posts. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain electrical and mechanical compatibility across the 38-position, 2-row configuration while meeting the same current rating and operating temperature requirements.

Key Parameters

Parameter	Value
Connector Type	Header, Cuttable
Number of Positions	38
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Contact Type	Male Pin
Termination	Solder
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution validity is determined by strict equivalence across the following critical parameters: 38-position count, 2-row configuration, 2.54mm mating pitch, 2.54mm row spacing, through-hole right-angle mounting, male pin contact type, solder termination, 3A per contact current rating, and UL94 V-0 flammability compliance.

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in contact material (phosphor bronze vs. brass), contact finish composition (gold thickness, tin plating), insulation material (thermoplastic vs. polyamide), and operating temperature range do not affect functional interchangeability within the specified 38-position, 2.54mm pitch header application. Product status transitions from obsolete (M20-9741942) to active status across all substitute options, ensuring long-term availability.

Parameter Comparison

Parameter	M20-9741942 (Harwin)	68021-138HLF (Amphenol ICC)	77317-103-38LF (Amphenol ICC)	77317-104-38LF (Amphenol ICC)	77317-403-38LF (Amphenol ICC)	77317-404-38LF (Amphenol ICC)	77317-803-38LF (Amphenol ICC)	77317-804-38LF (Amphenol ICC)	PREC019DBAN-M71RC (Sullins)
Number of Positions	38	38	38	38	38	38	38	38	38
Number of Rows	2	2	2	2	2	2	2	2	2
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)
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)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Current Rating (Amps)	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A
Operating Temperature	-40°C ~ 105°C	-65°C ~ 125°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	-40°C ~ 105°C
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
RoHS Status	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the M20-9741942 and maintain compliance with UL94 V-0 flammability and RoHS requirements. The primary distinction between substitutes lies in product status and availability.

Amphenol ICC BERGSTIK® series parts (68021-138HLF, 77317-103-38LF, 77317-104-38LF, 77317-403-38LF, 77317-404-38LF, 77317-803-38LF, 77317-804-38LF) are all active products with extended operating temperature ranges (-65°C to 125°C or 130°C) compared to the original part. These parts offer superior thermal performance and long-term supply continuity. Inventory levels across the Amphenol ICC line range from 756 to 1,096 pieces.

The Sullins Connector Solutions PREC019DBAN-M71RC maintains the original operating temperature range (-40°C to 105°C) and ROHS3 compliance status, offering the closest thermal and compliance profile to the M20-9741942. This part carries the highest inventory availability at 5,412 pieces and is suitable for direct replacement in applications where the original temperature specification is required.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the M20-9741942?

A: Yes. All listed substitutes maintain the critical electrical and mechanical parameters: 38 positions, 2 rows, 2.54mm pitch, through-hole right-angle mounting, male pins, solder termination, and 3A per contact current rating. They are functionally equivalent for board-to-board or cable applications.

Q: What is the difference between the Amphenol ICC BERGSTIK® variants?

A: The variants differ in contact material finish and post length specifications. Parts 77317-103-38LF and 77317-403-38LF feature 0.100" (2.54mm) post length, while 77317-104-38LF, 77317-404-38LF, and 77317-804-38LF feature 0.120" (3.05mm) post length. Contact finish options include gold (GXT™ at 30.0µin or 15.0µin thickness) or tin (78.7µin thickness). These variations do not affect electrical interchangeability.

Q: Why does the Sullins part have higher inventory than Amphenol ICC parts?

A: The PREC019DBAN-M71RC is supplied in bulk packaging, which typically results in higher stock levels. Amphenol ICC parts are supplied in bag packaging. Both inventory levels indicate active production and availability.

Q: Are there temperature limitations I should consider when selecting a substitute?

A: The original M20-9741942 operates from -40°C to 105°C. Amphenol ICC substitutes extend this range to -65°C to 125°C or 130°C, providing additional thermal margin. The Sullins PREC019DBAN-M71RC maintains the original -40°C to 105°C specification. Select based on your application's thermal requirements.

Q: Do all substitutes meet RoHS compliance?

A: Yes. The M20-9741942 is ROHS3 compliant. Amphenol ICC substitutes are RoHS compliant. The Sullins part is ROHS3 compliant. All parts meet regulatory requirements for restricted substance elimination.

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

A: The original M20-9741942 is specified as cuttable. Most Amphenol ICC substitutes are specified as breakaway, which provides a designed separation point. Both types are mechanically compatible with the 38-position, 2.54mm pitch configuration and do not affect electrical performance in the application.

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