M22-2741746 Equivalent & Substitute Parts

Part Overview

The M22-2741746 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle board-to-board applications. This 34-position connector with 2.00mm pitch operates across -40°C to 105°C and is rated for 2A current. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.079" (2.00mm)
Number of Positions	34
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Fastening Type	Push-Pull
Insulation Material	Polyamide (PA6T), Nylon 6T
Operating Temperature	-40°C ~ 105°C
Current Rating	2A
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the M22-2741746 is determined by strict alignment of the following critical parameters:

Pitch - Mating: 0.079" (2.00mm) — mechanical compatibility with mating connectors
Number of Positions: 34 — circuit connectivity requirement
Number of Rows: 2 — physical layout constraint
Row Spacing - Mating: 0.079" (2.00mm) — board layout compatibility
Mounting Type: Through Hole, Right Angle — PCB assembly method
Termination: Solder — connection method
Fastening Type: Push-Pull — mechanical engagement mechanism
Insulation Material: Polyamide or equivalent thermoplastic — environmental resistance
Material Flammability Rating: UL94 V-0 — safety compliance

The substitute part 951234-7622-AR (3M) meets all critical substitution criteria. Variations in contact finish, contact length specifications, and operating temperature range do not preclude functional equivalence when the primary parameters align.

Parameter Comparison

Parameter	M22-2741746 (Harwin)	951234-7622-AR (3M)
Connector Type	Header, Cuttable	Header
Contact Type	Male Pin	Male Pin
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Number of Positions	34	34
Number of Rows	2	2
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Contact Length - Mating	0.165" (4.20mm)	0.173" (4.40mm)
Contact Length - Post	0.094" (2.40mm)	0.110" (2.79mm)
Insulation Height	0.157" (4.00mm)	0.157" (4.00mm)
Contact Shape	Square	Square
Contact Finish - Mating	Tin	Gold (Flash)
Contact Material	Phosphor Bronze	Copper Alloy
Insulation Material	Polyamide (PA6T), Nylon 6T	Thermoplastic
Operating Temperature	-40°C ~ 105°C	-55°C ~ 125°C
Current Rating	2A	1A
Material Flammability Rating	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	RoHS Compliant
Product Status	Obsolete	Active

Engineering Selection Recommendations

The 951234-7622-AR (3M) is a direct functional substitute for the M22-2741746 based on alignment of all critical mechanical and electrical parameters. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

Both parts maintain UL94 V-0 flammability compliance and meet RoHS requirements. The 951234-7622-AR provides an extended operating temperature range (-55°C to 125°C versus -40°C to 105°C), which offers broader environmental compatibility. The gold flash contact finish on the substitute part provides enhanced corrosion resistance compared to the tin finish of the original part.

The current rating difference (1A for the substitute versus 2A for the original) must be evaluated against actual circuit requirements. If the application demands the full 2A rating, this parameter becomes a limiting factor for substitution.

Frequently Asked Questions (FAQ)

Q: Can the 951234-7622-AR directly replace the M22-2741746 in existing designs?

A: Yes, provided that the circuit current requirement does not exceed 1A. The mechanical pitch, position count, row configuration, and mounting method are identical, ensuring PCB compatibility and mating connector interchangeability.

Q: What is the significance of the contact finish difference (Tin vs. Gold Flash)?

A: Gold flash plating provides superior oxidation resistance and contact reliability in high-humidity or corrosive environments. Tin plating is adequate for standard indoor applications. The gold finish of the substitute part does not create incompatibility; it represents an enhancement.

Q: Does the extended operating temperature range of the substitute part affect compatibility?

A: No. The substitute part's wider temperature range (-55°C to 125°C) is a superset of the original part's range (-40°C to 105°C). Applications operating within the original temperature limits will function identically with the substitute part.

Q: Are there any packaging or inventory considerations?

A: The M22-2741746 is available in 765 pieces as new original stock. The 951234-7622-AR is available in 1086 pieces in bulk packaging. Both parts carry MSL 1 (Unlimited) moisture sensitivity classification, requiring no special storage precautions.

Q: What is the impact of the contact material difference (Phosphor Bronze vs. Copper Alloy)?

A: Both materials provide adequate electrical conductivity and mechanical durability for this connector class. The copper alloy used in the substitute part is a standard material for rectangular connectors and does not introduce compatibility issues.

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