M20-9701646 Equivalent & Substitute Parts

Part Overview

The M20-9701646 is a rectangular connector header manufactured by Harwin Inc., featuring a right-angle, through-hole design with 32 positions at 2.54mm pitch. This connector is classified as obsolete, making equivalent substitute parts necessary for ongoing design work, maintenance, and production continuity. The part serves board-to-board or cable interconnection applications requiring solder termination and push-pull fastening.

Key Parameters

Parameter	M20-9701646
Manufacturer	Harwin Inc.
Connector Type	Header, Cuttable
Pitch - Mating	0.100" (2.54mm)
Number of Positions	32
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Contact Type	Male Pin
Termination	Solder
Fastening Type	Push-Pull
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 critical parameters:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 32
Number of Rows: 2
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
Current Rating: 3A per Contact (minimum)

All substitute parts listed meet these core electrical and mechanical parameters. Variations in contact finish, contact material, insulation material, and operating temperature ranges are noted but do not preclude substitution when the critical parameters align.

Parameter Comparison

Parameter	M20-9701646 (Harwin)	61303221021 (Würth)	77317-112-32LF (Amphenol)	77317-412-32LF (Amphenol)	77317-812-32LF (Amphenol)	961232-5804-AR (3M)
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	32	32	32	32	32	32
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
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	0.276" (7.00mm)	0.236" (6.00mm)	0.268" (6.80mm)	0.268" (6.80mm)	0.268" (6.80mm)	0.272" (6.90mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.130" (3.30mm)
Insulation Height	0.200" (5.08mm)	0.200" (5.08mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.197" (5.00mm)
Contact Finish - Mating	Tin	Gold	Gold, GXT™	Tin	Gold, GXT™	Gold
Contact Material	Brass	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Copper Alloy
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-25°C ~ 105°C
Current Rating	3A per Contact	3A	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	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs)

The Würth Elektronik 61303221021 and Amphenol ICC BERGSTIK® series (77317-112-32LF, 77317-412-32LF, 77317-812-32LF) are active products with full RoHS compliance and extended operating temperature ranges. These parts maintain identical pitch, position count, and row spacing while offering improved contact materials and finishes. The Amphenol parts provide extended temperature operation (-65°C ~ 130°C) compared to the original specification.

Secondary Substitute (Current Limitation)

The 3M 961232-5804-AR meets all mechanical and electrical parameters with the exception of current rating, which is specified at 2A per contact versus the 3A requirement of the original part. This part is suitable only for applications where the 2A current limit is acceptable.

Compliance Considerations

All substitute parts maintain UL94 V-0 flammability rating and RoHS compliance. The Amphenol parts carry REACH Affected status, while the Würth part is REACH Unaffected. Selection should account for supply chain compliance requirements specific to the end application.

Frequently Asked Questions (FAQ)

Q: Can I use 61303221021 as a direct replacement for M20-9701646?

A: Yes. The Würth Elektronik 61303221021 maintains identical pitch (2.54mm), position count (32), row spacing (2.54mm), and mounting configuration (through-hole, right-angle). Contact length variations (6.00mm vs. 7.00mm mating length) are within acceptable tolerance for standard board-to-board applications. Verify PCB pad layout compatibility before production implementation.

Q: What is the difference between the three Amphenol BERGSTIK® options?

A: The three Amphenol parts (77317-112-32LF, 77317-412-32LF, 77317-812-32LF) differ in contact finish and packaging. The 77317-112-32LF features gold mating finish with 30.0µin thickness. The 77317-412-32LF uses tin mating finish. The 77317-812-32LF provides gold mating finish with 15.0µin thickness. All three share identical mechanical dimensions and electrical ratings. Selection depends on contact finish requirements and packaging constraints (bag vs. bulk).

Q: Why does the 3M 961232-5804-AR have a lower current rating?

A: The 3M part is specified at 2A per contact, compared to 3A for the original and other substitutes. This reflects design differences in contact geometry and material composition. Use this part only in applications where current per contact does not exceed 2A.

Q: Are there temperature range considerations for substitution?

A: The original M20-9701646 operates from -40°C to 105°C. The Amphenol BERGSTIK® parts extend this to -65°C to 130°C, providing broader environmental capability. The 3M part operates -25°C to 105°C. For applications within the original temperature range, all parts are suitable. For extended temperature operation, the Amphenol parts are preferred.

Q: What packaging options are available?

A: The Würth 61303221021 is supplied in bulk packaging. The Amphenol 77317-112-32LF and 77317-412-32LF are supplied in bag packaging. The Amphenol 77317-812-32LF is supplied in bulk. The 3M 961232-5804-AR packaging is not specified. Confirm packaging requirements with procurement before ordering.

Q: Are all substitutes RoHS compliant?

A: Yes. All substitute parts carry RoHS compliance certification. The Würth part is ROHS3 Compliant. The Amphenol and 3M parts are RoHS Compliant. Verify specific RoHS revision requirements for your application and supply chain.

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