M20-8761646P Equivalent & Substitute Parts

Part Overview

The M20-8761646P is a rectangular connector header manufactured by Harwin Inc., designed for surface mount applications with 32 positions at 2.54mm pitch. This component is classified as Obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The M20-8761646P features a cuttable header configuration with unshrouded design, suitable for board-to-board or cable connections. With a 2-row layout and solder termination, this connector supports 3A per contact at 250V operating voltage across a temperature range of -40°C to 105°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-8761646P
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	32
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Surface Mount
Termination	Solder
Contact Length - Mating	0.228" (5.80mm)
Insulation Height	0.100" (2.54mm)
Contact Material	Brass
Insulation Material	Polyamide (PA6T), Nylon 6T
Operating Temperature	-40°C ~ 105°C
Current Rating	3A per Contact
Voltage Rating	250V
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the M20-8761646P is determined by the following critical parameters:

Core Compatibility Parameters:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 32
Number of Rows: 2
Row Spacing - Mating: 0.100" (2.54mm)
Connector Type: Header, Cuttable
Contact Type: Male Pin
Mounting Type: Surface Mount
Termination: Solder
Insulation Height: 0.100" (2.54mm)
Contact Shape: Square
Material Flammability Rating: UL94 V-0

Substitute parts are grouped into two categories:

Category 1: Harwin Inc. Direct Substitutes

M20-8761842: Same manufacturer, same series (M20), identical core electrical and mechanical parameters. Differs in position count (36 vs. 32) and contact finish (Gold vs. Tin). Active product status.

Category 2: Samtec Inc. Cross-Manufacturer Substitutes

TSM series headers: Alternative manufacturer offering equivalent 32-position, 2.54mm pitch surface mount headers. Core parameters match the M20-8761646P. Variations exist in contact material (Phosphor Bronze vs. Brass), insulation material (LCP vs. Nylon 6T), contact length (0.320" vs. 0.228"), contact finish specifications, and packaging options. All TSM variants maintain UL94 V-0 compliance and extended operating temperature range (-55°C ~ 125°C).

Parameter Comparison

Parameter	M20-8761646P	M20-8761842	TSM-116-02-F-DV	TSM-116-02-F-DV-A	TSM-116-02-F-DV-P	TSM-116-02-F-DV-P-TR	TSM-116-02-FM-DV	TSM-116-02-G-DV	TSM-116-02-G-DV-A	TSM-116-02-H-DV	TSM-116-02-H-DV-LC
Manufacturer	Harwin Inc.	Harwin Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Number of Positions	32	36	32	32	32	32	32	32	32	32	32
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)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2	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)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Contact Length - Mating	0.228" (5.80mm)	0.228" (5.80mm)	0.320" (8.13mm)	0.320" (8.13mm)	0.320" (8.13mm)	0.320" (8.13mm)	0.320" (8.13mm)	0.320" (8.13mm)	0.320" (8.13mm)	0.320" (8.13mm)	0.320" (8.13mm)
Insulation Height	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)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Material	Brass	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Contact Finish - Mating	Tin	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°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	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: M20-8761842

The M20-8761842 is the preferred substitute from Harwin Inc. This part maintains identical core electrical and mechanical specifications with the M20-8761646P, including pitch, row spacing, mounting type, and termination method. Both components share the same series designation (M20) and comply with ROHS3 and UL94 V-0 standards. The M20-8761842 is Active status, ensuring long-term availability and supply chain stability. The primary difference is position count (36 vs. 32), which requires PCB layout accommodation.

Secondary Recommendation: Samtec TSM-116 Series

The Samtec TSM-116-02 variants provide cross-manufacturer alternatives with identical 32-position, 2.54mm pitch configuration. All TSM variants maintain UL94 V-0 compliance and ROHS3 status. The TSM series offers extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 105°C) and multiple packaging options (Bulk, Tube, Tape & Reel). Contact length differs (0.320" vs. 0.228"), requiring PCB footprint verification. Insulation material differs (LCP vs. Nylon 6T), offering improved thermal and chemical resistance with LCP.

Selection Criteria by Application:

For direct form-fit-function replacement with same manufacturer: Select M20-8761842
For extended temperature range applications: Select TSM-116 series variants
For automated assembly with tape & reel packaging: Select TSM-116-02-F-DV-P-TR
For board guide feature requirement: Select TSM-116-02-F-DV-A or TSM-116-02-G-DV-A
For board lock feature requirement: Select TSM-116-02-H-DV-LC

Frequently Asked Questions (FAQ)

Q: Can M20-8761842 directly replace M20-8761646P on existing PCBs?

A: M20-8761842 shares identical pitch, row spacing, and mounting specifications. The primary difference is position count (36 vs. 32). Direct PCB replacement requires verification that the additional 4 positions do not conflict with adjacent components or board layout constraints.

Q: What are the key differences between Harwin M20 and Samtec TSM-116 headers?

A: Core pitch and position specifications are identical. Harwin M20 uses Brass contacts with Nylon 6T insulation and shorter mating contact length (0.228"). Samtec TSM-116 uses Phosphor Bronze contacts with LCP insulation and longer mating contact length (0.320"). Samtec offers extended temperature range (-55°C ~ 125°C) and multiple packaging options. Harwin maintains narrower operating temperature range (-40°C ~ 105°C).

Q: Are all TSM-116-02 variants electrically equivalent?

A: All TSM-116-02 variants maintain identical electrical specifications (pitch, positions, rows, contact type, termination). Variants differ in contact finish specifications (F, G, H designations indicate different gold plating thicknesses), features (Board Guide, Board Lock, Pick and Place), and packaging (Bulk, Tube, Tape & Reel). Electrical performance is equivalent across all variants.

Q: What packaging options are available for TSM-116-02 headers?

A: TSM-116-02-F-DV and TSM-116-02-FM-DV are available in Bulk packaging. TSM-116-02-F-DV-A, TSM-116-02-F-DV-P, TSM-116-02-G-DV-A are available in Tube packaging. TSM-116-02-F-DV-P-TR is available in Tape & Reel (TR) packaging for automated assembly. Packaging selection depends on assembly process requirements and volume.

Q: Does contact length difference affect PCB design?

A: Yes. M20-8761646P and M20-8761842 have 0.228" (5.80mm) mating contact length. TSM-116-02 variants have 0.320" (8.13mm) mating contact length. Longer contact length in TSM variants requires PCB pad depth adjustment and may affect mating connector clearance. PCB footprint verification is required before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. M20-8761842 and all TSM-116-02 variants are ROHS3 Compliant. All parts maintain UL94 V-0 material flammability rating and MSL 1 (Unlimited) moisture sensitivity level.

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