Equivalent & Substitute Parts for M20-9741946

Part Overview

The Harwin M20-9741946 is a rectangular connector header, right-angle mounted, 38-position, 2.54mm pitch, designed for through-hole board-to-board or cable applications. This part is classified as obsolete, necessitating identification of active substitute components that maintain electrical and mechanical compatibility. Substitute parts must preserve the core mating interface specifications, contact rating, and physical mounting characteristics to ensure direct functional replacement in existing designs.

Key Parameters

Parameter	M20-9741946 (Harwin)
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	38
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the M20-9741946 is determined by strict adherence to the following parameters:

Critical Matching Parameters:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 38
Number of Rows: 2
Row Spacing - Mating: 0.100" (2.54mm)
Contact Type: Male Pin
Mounting Type: Through Hole, Right Angle
Termination: Solder
Current Rating: 3A per Contact
Material Flammability Rating: UL94 V-0
Moisture Sensitivity Level: 1 (Unlimited)

All identified substitute parts meet these core electrical and mechanical parameters. Variations in contact finish material (Tin vs. Gold), contact material composition (Brass vs. Phosphor Bronze), insulation material (Polyamide vs. Thermoplastic), and operating temperature range are secondary differentiators that do not preclude functional substitution when the primary mating interface and electrical characteristics remain constant.

Parameter Comparison

Parameter	M20-9741946	68021-138HLF	77317-103-38LF	77317-104-38LF	77317-403-38LF	77317-404-38LF	77317-803-38LF	77317-804-38LF	PRPC019DBAN-M71RC
Manufacturer	Harwin Inc.	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Sullins Connector Solutions
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
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)
Number of Positions	38	38	38	38	38	38	38	38	38
Number of Rows	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)
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
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
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 per Contact
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	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Contact Length - Mating	0.228" (5.80mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)
Contact Length - Post	0.118" (3.00mm)	0.120" (3.05mm)	0.100" (2.54mm)	0.120" (3.05mm)	0.100" (2.54mm)	0.120" (3.05mm)	0.100" (2.54mm)	0.120" (3.05mm)	0.120" (3.05mm)
Insulation Height	0.200" (5.08mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.197" (5.00mm)
Contact Material	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Brass
Contact Finish - Mating	Tin	Gold or Gold, GXT™	Gold, GXT™	Gold, GXT™	Tin	Tin	Gold, GXT™	Gold, GXT™	Gold

Engineering Selection Recommendations

All substitute parts listed maintain active product status and meet the core electrical and mechanical interface requirements of the M20-9741946. Selection among substitutes should be based on the following criteria:

For applications requiring extended operating temperature range: The Amphenol ICC (FCI) BERGSTIK® series (77317-103-38LF, 77317-104-38LF, 77317-403-38LF, 77317-404-38LF, 77317-803-38LF, 77317-804-38LF) and BERGSTIK® II (68021-138HLF) support -65°C to 125°C or -65°C to 130°C, exceeding the original -40°C to 105°C specification.

For applications with identical operating temperature requirements: The Sullins PRPC019DBAN-M71RC maintains the original -40°C to 105°C operating range.

For contact finish considerations: Tin-plated variants (77317-403-38LF, 77317-404-38LF) provide cost-effective substitution. Gold-plated variants (77317-103-38LF, 77317-104-38LF, 77317-803-38LF, 77317-804-38LF, 68021-138HLF, PRPC019DBAN-M71RC) offer enhanced corrosion resistance and signal integrity in demanding environments.

For post length variations: Contact post length differs between variants. The 77317-103-38LF and 77317-403-38LF provide 0.100" (2.54mm) post length, while 77317-104-38LF, 77317-404-38LF, 77317-804-38LF, 68021-138HLF, and PRPC019DBAN-M71RC provide 0.120" (3.05mm) post length. Verify PCB design compatibility with selected post length.

All substitute parts maintain RoHS compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts directly replace the M20-9741946 without PCB redesign?

A: Yes, all listed substitute parts maintain the critical mating interface parameters: 0.100" (2.54mm) pitch, 38 positions, 2 rows, 0.100" (2.54mm) row spacing, and through-hole right-angle mounting. However, verify contact post length compatibility with your PCB design, as some variants provide 0.100" (2.54mm) post length while others provide 0.120" (3.05mm).

Q: What is the difference between the Amphenol ICC (FCI) BERGSTIK® and BERGSTIK® II series?

A: The BERGSTIK® II series (68021-138HLF) is a newer product line with enhanced specifications. Both series maintain identical mating interface geometry and electrical ratings. The BERGSTIK® II supports a wider operating temperature range (-65°C to 125°C) and offers gold or gold GXT™ contact finish options.

Q: Are there any compliance differences between the original part and substitutes?

A: The original M20-9741946 is ROHS3 Compliant. All Amphenol ICC (FCI) substitutes are RoHS Compliant. The Sullins PRPC019DBAN-M71RC is ROHS3 Compliant. All parts maintain UL94 V-0 flammability rating and MSL 1 (Unlimited) moisture sensitivity level.

Q: What is the significance of contact finish material (Tin vs. Gold)?

A: Contact finish affects corrosion resistance and signal integrity. Tin-plated contacts (77317-403-38LF, 77317-404-38LF) provide cost-effective solutions for standard applications. Gold-plated contacts offer superior corrosion resistance and are preferred for high-reliability or high-frequency applications.

Q: Do all substitutes support the same current rating?

A: Yes, all substitute parts maintain the 3A per contact current rating, matching the original M20-9741946 specification.

Q: What packaging options are available?

A: Amphenol ICC (FCI) parts are supplied in Bag packaging. The Sullins PRPC019DBAN-M71RC is supplied in Bulk packaging. Verify packaging requirements for your procurement and assembly processes.

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