M20-9953345 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9953345 is a rectangular connector header, right-angle mounted, with 66 positions at 2.54mm pitch. This through-hole component is designed for board-to-board or cable connections with solder termination and push-pull fastening. The part is currently obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	66
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
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
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Position Count: 66 positions (exact match required for direct substitution)
Pitch: 0.100" (2.54mm) mating pitch and row spacing
Mounting Configuration: Through-hole, right-angle orientation
Contact Type: Male pin, solder termination
Fastening: Push-pull mechanism
Electrical Rating: 3A per contact minimum
Compliance: UL94 V-0 flammability, RoHS3 or RoHS compliant

The M20-9953645 (72 positions) is listed as a substitute but requires design verification due to increased position count. All Amphenol ICC BERGSTIK® series parts (77317-112-66LF, 77317-412-66LF, 77317-812-66LF) maintain exact position and pitch specifications with active product status. The Preci-Dip 892-70-066-20-001101 and 3M 961266-5804-AR provide functional equivalence with minor contact geometry variations.

Parameter Comparison

Parameter	M20-9953345	M20-9953645	77317-112-66LF	77317-412-66LF	77317-812-66LF	892-70-066-20-001101	961266-5804-AR
Manufacturer	Harwin Inc.	Harwin Inc.	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Preci-Dip	3M
Number of Positions	66	72	66	66	66	66	66
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)
Number of Rows	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)
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
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	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)	0.268" (6.80mm)	0.268" (6.80mm)	0.268" (6.80mm)	0.236" (6.00mm)	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)	0.118" (3.00mm)	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)	0.200" (5.08mm)	0.197" (5.00mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square
Contact Material	Brass	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Brass	Copper Alloy
Contact Finish - Mating	Gold	Gold	Gold, GXT™	Tin	Gold, GXT™	Gold	Gold
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-55°C ~ 125°C	-25°C ~ 105°C
Current Rating	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A	2A
Material Flammability Rating	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	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalents (66 Positions, Exact Pitch Match):

The Amphenol ICC BERGSTIK® series parts (77317-112-66LF, 77317-412-66LF, 77317-812-66LF) are active products with identical position and pitch specifications. These parts offer extended operating temperature ranges (-65°C to 130°C) compared to the original M20-9953345 (-40°C to 105°C). Contact finish variations exist: 77317-112-66LF and 77317-812-66LF feature gold mating surfaces, while 77317-412-66LF uses tin. All three maintain 3A per contact current rating and UL94 V-0 flammability compliance.

The Preci-Dip 892-70-066-20-001101 provides functional equivalence with identical position count and pitch. This part maintains 3A current rating, UL94 V-0 compliance, and ROHS3 certification. Operating temperature range extends to -55°C to 125°C.

Alternative with Position Increase:

The Harwin M20-9953645 (72 positions) is an active product within the same M20 series. This part is suitable only when additional contact positions can be accommodated in the design. It maintains identical pitch, mounting configuration, and electrical ratings as the original.

Limited Current Rating Alternative:

The 3M 961266-5804-AR maintains 66 positions and 2.54mm pitch but operates at 2A per contact (reduced from 3A). This part is suitable only for applications with lower current requirements. Operating temperature range is -25°C to 105°C.

Frequently Asked Questions (FAQ)

Q: Can I use the M20-9953645 as a direct replacement?

A: The M20-9953645 has 72 positions instead of 66. Direct substitution requires design verification to confirm that the additional positions do not create interference or routing conflicts on the PCB. Electrical and mechanical specifications are otherwise compatible.

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

A: The three BERGSTIK® parts (77317-112-66LF, 77317-412-66LF, 77317-812-66LF) differ in contact finish specifications. 77317-112-66LF and 77317-812-66LF feature gold mating surfaces with different thickness specifications (30.0µin vs. 15.0µin). 77317-412-66LF uses tin mating finish. All three maintain identical position count, pitch, current rating, and temperature range.

Q: Is the 3M 961266-5804-AR suitable for my application?

A: The 3M part operates at 2A per contact versus 3A for the original. Use this part only if your application current requirements are 2A or less per contact. Operating temperature range is also more limited (-25°C to 105°C).

Q: What compliance certifications should I verify?

A: All substitute parts maintain UL94 V-0 flammability rating and RoHS compliance. The Amphenol and Preci-Dip parts are RoHS compliant; Harwin and Preci-Dip parts are ROHS3 compliant. Verify REACH status requirements for your specific application region.

Q: Are there packaging differences I should consider?

A: Packaging varies by supplier. Harwin M20-9953645 is supplied in bulk; Amphenol BERGSTIK® parts are bagged; Preci-Dip is bulk; 3M packaging is not specified. Confirm packaging requirements for your procurement and assembly processes.

Q: What is the impact of contact geometry variations?

A: Contact length variations exist across substitutes (ranging from 0.236" to 0.272" mating length). These differences are within acceptable tolerances for standard 2.54mm pitch applications but should be verified against your specific connector housing and mating interface requirements.

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