Equivalent & Substitute Parts for M20-9952945

Part Overview

The Harwin M20-9952945 is a rectangular connector header featuring a right-angle, through-hole configuration with 58 positions at 2.54mm pitch. This connector is classified as obsolete, making equivalent substitute parts necessary for ongoing design work, production continuity, and system maintenance. The M20 series header is designed for board-to-board applications with solder termination and push-pull fastening.

Key Parameters

Parameter	Value
Connector Type	Header, Right Angle
Number of Positions	58
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
Fastening Type	Push-Pull
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 eligibility for the M20-9952945 is determined by strict adherence to the following parameters:

Critical Matching Parameters:

Number of positions: 58
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
Fastening type: Push-pull
Material flammability rating: UL94 V-0

Allowable Variations:

Contact length (mating and post) may vary within mechanical compatibility limits
Insulation height may vary within connector body design constraints
Contact finish composition and thickness may differ
Operating temperature range may be extended
Contact material composition may differ (brass vs. phosphor bronze)
Insulation material composition may differ (polyamide vs. thermoplastic)
Product status may transition from obsolete to active

The following parts meet these substitution criteria: 77317-112-58LF, 77317-412-58LF, 77317-812-58LF, 961258-5804-AR, and TSW-129-08-L-D-RA.

Parameter Comparison

Parameter	M20-9952945 (Harwin)	77317-112-58LF (Amphenol ICC)	77317-412-58LF (Amphenol ICC)	77317-812-58LF (Amphenol ICC)	961258-5804-AR (3M)	TSW-129-08-L-D-RA (Samtec)
Manufacturer	Harwin Inc.	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	3M	Samtec Inc.
Series	M20	BERGSTIK®	BERGSTIK®	BERGSTIK®	961	TSW
Product Status	Obsolete	Active	Active	Active	Active	Active
Number of Positions	58	58	58	58	58	58
Number of Rows	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)
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)
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
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.240" (6.10mm)	0.268" (6.80mm)	0.268" (6.80mm)	0.268" (6.80mm)	0.272" (6.90mm)	0.230" (5.84mm)
Contact Length - Post	0.118" (3.00mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.130" (3.30mm)	0.090" (2.29mm)
Insulation Height	0.200" (5.08mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.197" (5.00mm)	0.219" (5.56mm)
Contact Material	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Copper Alloy	Phosphor Bronze
Contact Finish - Mating	Gold	Gold, GXT™	Tin	Gold, GXT™	Gold	Gold
Contact Finish - Post	—	Tin	Tin	Tin	Tin	Tin
Insulation Material	Polyamide (PA6T), Nylon 6T	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Polybutylene Terephthalate (PBT)
Operating Temperature	-40°C ~ 105°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-25°C ~ 105°C	-55°C ~ 125°C
Current Rating	3A per Contact	3A per Contact	3A per Contact	3A per Contact	2A	—
Material Flammability Rating	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	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts meet the core electrical and mechanical requirements for direct replacement of the M20-9952945. Selection should be based on product availability, compliance requirements, and specific application constraints.

Amphenol ICC BERGSTIK® Series (77317-112-58LF, 77317-412-58LF, 77317-812-58LF): These parts are active products with extended operating temperature ranges (-65°C to 130°C) and RoHS compliance. The 77317-112-58LF features gold-plated mating contacts with GXT™ enhancement. The 77317-412-58LF uses tin plating on mating contacts. The 77317-812-58LF provides gold-plated mating contacts with reduced thickness (15.0µin). All three variants maintain 3A per contact current rating and are available in higher inventory quantities.

3M 961 Series (961258-5804-AR): This part is an active product with RoHS compliance and UL94 V-0 flammability rating. Operating temperature range is -25°C to 105°C, matching the original part's upper limit. Current rating is 2A per contact, which is lower than the original specification. This part is suitable for applications where the reduced current rating is acceptable.

Samtec TSW Series (TSW-129-08-L-D-RA): This part is an active product with ROHS3 compliance and extended operating temperature range (-55°C to 125°C). Contact length specifications differ from the original part. This option is suitable for applications requiring enhanced temperature performance and ROHS3 certification.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the M20-9952945?

A: All listed parts share the same critical parameters: 58 positions, 2 rows, 2.54mm pitch, through-hole right-angle mounting, male pin contacts, solder termination, and push-pull fastening. Mechanical and electrical compatibility is established through these matching specifications. Physical board layout and connector body dimensions should be verified against your specific PCB design.

Q: What are the key differences between the Amphenol ICC BERGSTIK® variants?

A: The three BERGSTIK® parts differ primarily in mating contact finish: 77317-112-58LF uses gold with GXT™ enhancement, 77317-412-58LF uses tin, and 77317-812-58LF uses gold with reduced thickness (15.0µin). All three maintain identical pitch, position count, and current rating specifications. Contact finish selection depends on your application's corrosion resistance and cost requirements.

Q: Why does the 3M 961258-5804-AR have a lower current rating?

A: The 3M part specifies 2A per contact compared to 3A for the original and most substitutes. This is a design characteristic of the 961 series connector. Applications requiring the full 3A per contact rating should use alternative substitutes.

Q: Are there packaging differences I should consider?

A: The Amphenol ICC parts are supplied in bags, Samtec TSW is supplied in bulk, and 3M 961 packaging is not specified. Packaging format may affect handling, storage, and assembly processes. Confirm packaging requirements with your procurement and manufacturing teams.

Q: Do all substitutes meet RoHS compliance?

A: Yes, all listed substitutes are RoHS compliant. The M20-9952945 is ROHS3 compliant, and the Samtec TSW-129-08-L-D-RA is also ROHS3 compliant. The Amphenol ICC and 3M parts are RoHS compliant. All parts meet UL94 V-0 flammability requirements.

Q: Which substitute offers the widest operating temperature range?

A: The Amphenol ICC BERGSTIK® series (77317-112-58LF, 77317-412-58LF, 77317-812-58LF) offers -65°C to 130°C, providing the widest temperature envelope. The Samtec TSW-129-08-L-D-RA offers -55°C to 125°C. The 3M 961258-5804-AR matches the original specification at -25°C to 105°C.

Q: What should I verify before finalizing a substitute part selection?

A: Confirm that contact length specifications (mating and post) are compatible with your PCB thickness and connector receptacle design. Verify insulation height compatibility with your board layout. Confirm current and voltage requirements are met by the selected substitute. Review any specific compliance certifications required by your application or industry standards.

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