M20-9952645 Equivalent & Substitute Parts

Part Overview

The M20-9952645 is a rectangular connector header manufactured by Harwin Inc., featuring a right-angle, through-hole configuration with 52 positions at 2.54mm pitch. This connector is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part is designed for board-to-board applications with solder termination and push-pull fastening. Identifying compatible alternatives ensures design continuity and supply chain flexibility for applications requiring this connector specification.

Key Parameters

Parameter	M20-9952645
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	52
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Contact Material	Brass
Insulation Material	Polyamide (PA6T), Nylon 6T
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
Current Rating	3A per Contact
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the M20-9952645 is determined by the following critical parameters:

Pitch - Mating: 0.100" (2.54mm) — exact match required
Number of Positions: 52 — exact match required
Number of Rows: 2 — exact match required
Row Spacing - Mating: 0.100" (2.54mm) — exact match required
Mounting Type: Through Hole, Right Angle — exact match required
Contact Type: Male Pin — exact match required
Termination: Solder — exact match required
Fastening Type: Push-Pull — exact match required
Material Flammability Rating: UL94 V-0 — exact match required

All four substitute parts (77317-112-52LF, 77317-412-52LF, 77317-812-52LF, and 961252-5804-AR, TSW-126-08-L-D-RA) meet these core electrical and mechanical requirements. Variations in contact finish, contact material, insulation material, and operating temperature ranges are permitted within the scope of rectangular connector substitution standards, provided the primary mating and mounting characteristics remain identical.

Parameter Comparison

Parameter	M20-9952645	77317-112-52LF	77317-412-52LF	77317-812-52LF	961252-5804-AR	TSW-126-08-L-D-RA
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
Connector Type	Header, Cuttable	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
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)
Number of Positions	52	52	52	52	52	52
Number of Rows	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)
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
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 Shape	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold, GXT™	Tin	Gold, GXT™	Gold	Gold
Contact Material	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Copper Alloy	Phosphor Bronze
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
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Current Rating	3A per Contact	3A per Contact	3A per Contact	3A per Contact	2A	Not Specified
RoHS Status	ROHS3 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)

Engineering Selection Recommendations

All substitute parts listed are active products with current manufacturing support, addressing the obsolescence status of the M20-9952645. Selection among the alternatives should be based on the following criteria:

Amphenol ICC BERGSTIK® Series (77317-112-52LF, 77317-412-52LF, 77317-812-52LF): These three parts offer the most direct functional equivalence with extended operating temperature ranges (-65°C to 130°C) and are RoHS compliant. The primary distinction among them is contact finish: 77317-112-52LF and 77317-812-52LF feature gold mating surfaces with varying thickness specifications, while 77317-412-52LF uses tin finish. All three maintain the 3A per contact current rating matching the original part.

3M 961 Series (961252-5804-AR): This alternative provides active product status and RoHS compliance with a gold mating finish. The current rating is specified at 2A per contact, which is lower than the original 3A specification. Operating temperature range (-25°C to 105°C) aligns with the original part's upper and lower limits.

Samtec TSW Series (TSW-126-08-L-D-RA): This option offers the widest operating temperature range (-55°C to 125°C) and ROHS3 compliance matching the original part's certification level. Contact length specifications differ notably from other alternatives. Current rating is not specified for this part.

For applications requiring the full 3A per contact current rating, the Amphenol ICC BERGSTIK® series parts are preferred. For applications with extended temperature requirements, the Samtec TSW series provides superior thermal performance.

Frequently Asked Questions (FAQ)

Q: Can the M20-9952645 be directly replaced with any of these substitute parts?

A: Yes, all listed substitute parts meet the core electrical and mechanical requirements: 52 positions, 2.54mm pitch, 2-row configuration, through-hole right-angle mounting, solder termination, and push-pull fastening. Physical board layout compatibility should be verified, as contact length and insulation height specifications vary slightly among alternatives.

Q: What is the significance of the contact finish differences among the Amphenol ICC parts?

A: Contact finish affects mating surface durability and electrical performance. 77317-112-52LF and 77317-812-52LF feature gold finishes with different thickness specifications (30.0µin and 15.0µin respectively), providing enhanced corrosion resistance. 77317-412-52LF uses tin finish, which is suitable for standard applications but offers less corrosion protection than gold. Selection depends on environmental exposure and mating cycle requirements.

Q: Why does the 3M 961252-5804-AR have a lower current rating?

A: The 3M part specifies 2A per contact compared to 3A for the original and most alternatives. This represents a design difference in contact geometry and material composition. Applications requiring the full 3A per contact capacity should use alternatives with matching current ratings.

Q: Are there packaging differences among the substitute parts?

A: Yes. The Amphenol ICC parts are supplied in bags, the 3M part packaging is not specified, and the Samtec part is supplied in bulk. Packaging affects handling, storage, and procurement logistics but does not impact electrical or mechanical compatibility.

Q: Which substitute part offers the best temperature performance?

A: The Samtec TSW-126-08-L-D-RA provides the widest operating temperature range at -55°C to 125°C. The Amphenol ICC BERGSTIK® series offers -65°C to 130°C, providing the lowest minimum and highest maximum temperatures. Selection depends on specific application temperature requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes, all substitute parts are RoHS compliant. The M20-9952645 and TSW-126-08-L-D-RA are ROHS3 compliant, while the Amphenol ICC and 3M parts are RoHS compliant. Both certifications meet current regulatory requirements.

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