M20-9951345 Equivalent & Substitute Parts

Part Overview

The M20-9951345 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle board-to-board or cable applications. This 26-position connector operates at 3A per contact with a 0.100" (2.54mm) pitch and is rated for -40°C to 105°C operation. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	26
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
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the M20-9951345 is determined by the following critical parameters:

Connector Configuration: 26-position, 2-row header with 0.100" (2.54mm) pitch and row spacing
Mounting and Orientation: Through-hole, right-angle mounting
Electrical Performance: 3A per contact current rating
Termination Method: Solder termination
Environmental Compliance: UL94 V-0 flammability rating and ROHS3 compliance

The substitute parts M20-9951346, 68020-126HLF, and 68021-126HLF meet these core requirements. Variations in contact finish material, contact length specifications, and operating temperature ranges are secondary parameters that do not prevent functional substitution when the primary electrical and mechanical interfaces remain compatible.

Parameter Comparison

Parameter	M20-9951345	M20-9951346	68020-126HLF	68021-126HLF
Manufacturer	Harwin Inc.	Harwin Inc.	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Product Status	Obsolete	Active	Active	Active
Number of Positions	26	26	26	26
Number of Rows	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	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
Termination	Solder	Solder	Solder	Solder
Current Rating (Amps)	3A per Contact	3A per Contact	3A per Contact	3A per Contact
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-65°C ~ 125°C	-65°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Contact Finish - Mating	Gold	Tin	Gold or Gold, GXT™	Gold or Gold, GXT™
Contact Material	Brass	Brass	Phosphor Bronze	Phosphor Bronze
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

M20-9951346 is the primary substitute for the M20-9951345. Both parts are manufactured by Harwin Inc. within the same M20 series. M20-9951346 is active in production and maintains ROHS3 compliance. The primary difference is contact finish material (tin versus gold), which does not affect functional compatibility for standard board-to-board applications. This part is recommended for direct replacement in new designs.

68020-126HLF and 68021-126HLF are cross-manufacturer alternatives from Amphenol ICC (FCI) within the BERGSTIK® II series. Both parts meet the core electrical and mechanical requirements with identical pitch, position count, and current rating. These parts offer extended operating temperature range (-65°C to 125°C) compared to the original specification. 68021-126HLF carries explicit RoHS compliance certification. Selection between these Amphenol alternatives depends on specific application requirements and supply chain considerations.

All substitute parts maintain UL94 V-0 flammability rating and MSL 1 moisture sensitivity level, ensuring compatibility with standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can M20-9951346 be used as a direct replacement for M20-9951345?

A: Yes. Both parts share identical pitch (0.100"), position count (26), row configuration (2 rows), mounting type (through-hole right-angle), and current rating (3A per contact). The contact finish difference (tin versus gold) does not prevent functional substitution in standard applications.

Q: What is the primary reason to substitute the M20-9951345?

A: The M20-9951345 is obsolete. M20-9951346 is the active production equivalent from the same manufacturer and series, ensuring design continuity and supply availability.

Q: Are the Amphenol ICC parts (68020-126HLF and 68021-126HLF) fully compatible?

A: Yes, both Amphenol parts meet the core substitution criteria: 26-position, 2-row configuration with 0.100" pitch, through-hole right-angle mounting, solder termination, and 3A per contact rating. Contact length specifications and contact material (phosphor bronze versus brass) differ slightly but do not affect mating interface compatibility.

Q: What is the difference between 68020-126HLF and 68021-126HLF?

A: The primary difference is contact length post specification: 68020-126HLF has 0.095" (2.41mm) post length, while 68021-126HLF has 0.120" (3.05mm) post length. 68021-126HLF also carries explicit RoHS compliance certification. Both parts are electrically and mechanically equivalent for standard applications.

Q: Do the substitute parts support the same operating temperature range?

A: M20-9951346 maintains the original -40°C to 105°C range. The Amphenol parts (68020-126HLF and 68021-126HLF) support an extended range of -65°C to 125°C, providing additional thermal margin for demanding applications.

Q: Are all substitute parts RoHS compliant?

A: M20-9951346 and 68021-126HLF carry explicit ROHS3 or RoHS compliance certification. 68020-126HLF does not specify RoHS status in the provided data. Verify compliance requirements for your specific application before selection.

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