M20-9950646 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The M20-9950646 is a right-angle rectangular connector header manufactured by Harwin Inc., designed for through-hole mounting with 12 positions at 2.54mm pitch. This connector is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design and procurement requirements. The part features male pins, unshrouded design, and solder termination suitable for board-to-board or cable applications.

Key Parameters

Parameter	Value
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	12
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Contact Length - Mating	0.240" (6.10mm)
Contact Length - Post	0.118" (3.00mm)
Insulation Height	0.200" (5.08mm)
Contact Shape	Square
Contact Finish - Mating	Tin
Contact Material	Brass
Insulation Material	Polyamide (PA6T), Nylon 6T
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
Insulation Color	Black
Current Rating	3A per Contact
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters: mating pitch (0.100" / 2.54mm), number of positions (12), number of rows (2), row spacing (0.100" / 2.54mm), mounting type (through hole, right angle), termination method (solder), contact type (male pin), and fastening type (push-pull). All identified substitute parts meet these core mechanical and electrical requirements.

The substitute parts are grouped into two categories:

Category 1: Harwin Series M20 (Active Status) M20-9950645 represents the active production equivalent within the same manufacturer series, differing only in contact finish (gold vs. tin) and product status.

Category 2: Molex C-Grid 71764 Series (Active Status) 0717640112 and 0717640212 are Molex alternatives with identical pitch, position count, and mounting configuration. Minor variations exist in contact post length (0.110" vs. 0.118") and contact material (copper alloy vs. brass).

Category 3: Amphenol ICC BERGSTIK® Series (Active Status) 68021-212HLF, 68021-412HLF, 77317-103-12LF, 77317-104-12LF, and 77317-804-12LF are Amphenol alternatives meeting core substitution criteria. These parts feature phosphor bronze contacts and extended operating temperature ranges in certain variants.

Parameter Comparison

Parameter	M20-9950646	M20-9950645	0717640112	0717640212	68021-212HLF	68021-412HLF	77317-103-12LF	77317-104-12LF	77317-804-12LF
Manufacturer	Harwin Inc.	Harwin Inc.	Molex	Molex	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
Series	M20	M20	C-Grid 71764	C-Grid 71764	BERGSTIK® II	BERGSTIK® II	BERGSTIK®	BERGSTIK®	BERGSTIK®
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	12	12	12	12	12	12	12	12	12
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)
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
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	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)	0.118" (3.00mm)	0.110" (2.79mm)	0.110" (2.79mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.100" (2.54mm)	0.120" (3.05mm)	0.120" (3.05mm)
Insulation Height	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.200" (5.08mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Tin	Gold	Gold	Gold	Gold or Gold, GXT™	Tin	Gold, GXT™	Gold, GXT™	Gold, GXT™
Contact Material	Brass	Brass	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	Not specified	Not specified	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°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
Current Rating	3A per Contact	3A per Contact	Not specified	Not specified	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: M20-9950645 The M20-9950645 is the direct active equivalent from Harwin Inc., maintaining identical mechanical and electrical specifications with the exception of contact finish (gold vs. tin). This part carries ROHS3 compliance and active product status, making it the preferred choice for direct replacement in new designs or production transitions.

Secondary Recommendations: Molex 0717640112 and 0717640212 Both Molex parts meet core substitution criteria and maintain active status. The 0717640112 and 0717640212 are functionally equivalent with minor post length variations (0.110" vs. 0.118"). These parts are suitable for applications where Molex component qualification exists. ROHS3 compliance is confirmed for both variants.

Tertiary Recommendations: Amphenol ICC BERGSTIK® Series The BERGSTIK® II variants (68021-212HLF and 68021-412HLF) and BERGSTIK® variants (77317-103-12LF, 77317-104-12LF, 77317-804-12LF) provide extended operating temperature ranges (-65°C to 125°C or 130°C) compared to the original part (-40°C to 105°C). These are suitable for applications requiring enhanced thermal performance. All variants maintain RoHS compliance and 3A per contact current rating.

Selection should prioritize parts with active product status and confirmed RoHS compliance for new designs. Contact finish differences (tin vs. gold) do not affect mechanical compatibility but may influence solderability characteristics in specific assembly processes.

Frequently Asked Questions (FAQ)

Q: Can M20-9950645 be used as a direct replacement for M20-9950646? A: Yes. M20-9950645 is the active production equivalent with identical mechanical and electrical specifications. The only difference is contact finish (gold vs. tin), which does not affect mechanical compatibility or electrical performance in standard applications.

Q: What are the key differences between Harwin and Molex alternatives? A: Both maintain 0.100" (2.54mm) pitch, 12 positions, and right-angle through-hole mounting. Molex parts feature copper alloy contacts versus Harwin's brass, and post length is 0.110" versus 0.118". These differences do not affect board-level compatibility for standard applications.

Q: Are Amphenol BERGSTIK® parts compatible with the original M20-9950646? A: Yes, for mechanical and electrical compatibility. Amphenol parts meet all core substitution criteria: pitch, position count, row spacing, mounting type, and termination method. Operating temperature ranges are extended in Amphenol variants, providing additional design margin in thermal environments.

Q: What is the significance of contact finish differences (tin vs. gold)? A: Contact finish affects solderability and corrosion resistance. Tin finishes are standard for general-purpose applications. Gold finishes provide enhanced corrosion resistance and are preferred in high-reliability or harsh environment applications. Both are electrically and mechanically compatible.

Q: Does the 0.010" difference in contact post length affect PCB compatibility? A: No. The contact post length variation (0.118" vs. 0.110" vs. 0.100") does not affect PCB hole compatibility or solder joint formation for standard through-hole assembly processes. All variants are mechanically compatible with standard PCB designs.

Q: Are all substitute parts RoHS compliant? A: Yes. All identified substitute parts carry RoHS compliance certification (ROHS3 or RoHS Compliant), meeting regulatory requirements for electronic component procurement.

Q: Which substitute part offers the widest operating temperature range? A: Amphenol BERGSTIK® variants (77317-103-12LF, 77317-104-12LF, 77317-804-12LF) offer -65°C to 130°C operating range, compared to the original part's -40°C to 105°C range. These are suitable for extended thermal environment applications.

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