3M 3431-5002 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3431-5002 is a through-hole, right-angle rectangular connector header with 34 positions at 2.54mm pitch. This connector is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part features shrouded 4-wall construction with solder termination and push-pull fastening, suitable for board-to-board or cable applications. Identifying compatible substitutes ensures design continuity and supply chain flexibility.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	34
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Contact Finish - Post	Tin-Lead
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
Current Rating	1.75A
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 3M 3431-5002 is determined by strict alignment of the following critical parameters:

Position Count & Pitch: 34 positions at 0.100" (2.54mm) mating pitch with 2-row configuration
Mounting Orientation: Through-hole, right-angle orientation
Shrouding Configuration: Shrouded 4-wall construction
Termination Method: Solder termination
Fastening Mechanism: Push-pull fastening type
Contact Configuration: Male pin contacts with gold mating finish
Operating Temperature Range: Minimum -55°C ~ 105°C capability
Flammability Rating: UL94 V-0 compliance

Substitute parts are grouped into two categories:

Direct Equivalents (34-Position, Right-Angle, Push-Pull): Parts meeting all critical parameters including 34 positions, right-angle mounting, and push-pull fastening. These include N3431-5002RB, D3431-5002-AR, 71922-034LF, CWN-500-34-0021, and CWN-502-34-0021.

Cross-Manufacturer Alternatives (40-Position, Right-Angle, Push-Pull): HARTING 09185405921 provides a 40-position variant with identical pitch, right-angle mounting, and push-pull fastening. This part accommodates additional signal lines while maintaining mechanical and electrical compatibility for applications with expanded pin requirements.

Vertical Orientation Alternative (40-Position, Vertical, Latch Lock): HARTING 09185405912 offers a 40-position vertical header with different fastening (latch lock/eject hooks) and mounting orientation. This part is listed as a substitute reference but differs in mounting type and fastening mechanism.

Parameter Comparison

Parameter	3431-5002	N3431-5002RB	D3431-5002-AR	71922-034LF	09185405921	CWN-500-34-0021	CWN-502-34-0021
Manufacturer	3M	3M	3M	Amphenol ICC (FCI)	HARTING	CW Industries	CW Industries
Number of Positions	34	34	34	34	40	34	34
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
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
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Latch Lock/Eject Hooks, Long
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Contact Finish - Mating	Gold	Gold	Gold	Gold, GXT™	Gold	Gold	Gold
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Nickel	Nickel
Contact Material	Copper Alloy	Copper Alloy	Brass	Phosphor Bronze	Copper Alloy	Phosphor Bronze	Phosphor Bronze
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°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
Current Rating (Amps)	1.75A	1.75A	1.75A	-	-	1A	1A
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes for Direct Replacement (34-Position, Right-Angle, Push-Pull)

N3431-5002RB is the recommended primary substitute. It is manufactured by 3M, maintains identical electrical and mechanical specifications to the original part, and is ROHS3 compliant with active product status. This part provides the most direct compatibility with existing designs.

D3431-5002-AR is an alternative 3M substitute from the D3000 series. It maintains 34-position configuration, right-angle mounting, and push-pull fastening. Minor variations include brass contact material versus copper alloy and reduced mating finish thickness (10.0µin versus 30.0µin). This part is ROHS3 compliant and actively produced.

71922-034LF from Amphenol ICC (FCI) is a Quickie™ series alternative with identical position count and mounting configuration. Contact material is phosphor bronze with increased post finish thickness (78.7µin). Operating temperature range is not specified. This part is RoHS compliant and actively produced.

CWN-500-34-0021 and CWN-502-34-0021 from CW Industries maintain 34-position configuration and right-angle mounting. CWN-500-34-0021 uses push-pull fastening, while CWN-502-34-0021 uses latch lock/eject hooks with long engagement. Both feature circular contact geometry versus square, phosphor bronze material, and nickel post finish. Current rating is 1A versus 1.75A. Both are ROHS3 compliant and actively produced with extended operating temperature range (-55°C ~ 125°C).

Cross-Manufacturer Alternative (40-Position, Right-Angle, Push-Pull)

HARTING 09185405921 provides a 40-position right-angle header with identical pitch and push-pull fastening. This part accommodates applications requiring additional signal lines while maintaining mechanical compatibility. Operating temperature range extends to 125°C. ROHS3 compliant and actively produced.

Product Status Consideration

The original 3M 3431-5002 is obsolete. All listed substitutes maintain active product status, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can N3431-5002RB directly replace 3M 3431-5002 in existing designs?

A: Yes. N3431-5002RB maintains identical electrical and mechanical specifications including 34 positions, 2.54mm pitch, right-angle mounting, shrouded 4-wall construction, push-pull fastening, and solder termination. The primary difference is ROHS3 compliance versus the original non-compliant status. Footprint and mating interface are identical.

Q: What is the difference between D3431-5002-AR and N3431-5002RB?

A: Both are 3M products with identical position count and mounting configuration. D3431-5002-AR uses brass contacts versus copper alloy and features reduced mating finish thickness (10.0µin versus 30.0µin). D3431-5002-AR is packaged in trays versus bulk. Both are ROHS3 compliant and actively produced.

Q: Can HARTING 09185405921 be used as a substitute?

A: HARTING 09185405921 is a 40-position variant with identical pitch and right-angle mounting. It is compatible for applications requiring additional signal lines. The 40-position configuration requires PCB layout modification. Fastening mechanism (push-pull) and operating temperature range (-55°C ~ 125°C) are compatible.

Q: What are the key differences between CWN-500-34-0021 and CWN-502-34-0021?

A: Both maintain 34-position configuration and right-angle mounting. CWN-500-34-0021 uses push-pull fastening, while CWN-502-34-0021 uses latch lock/eject hooks with long engagement. Contact geometry differs (circular versus square in original). Current rating is 1A versus 1.75A. Both are ROHS3 compliant with extended operating temperature range.

Q: Are all substitutes RoHS compliant?

A: All listed substitutes are RoHS compliant (either RoHS or ROHS3). The original 3M 3431-5002 is RoHS non-compliant. Substitution provides compliance upgrade for new designs or procurement requirements.

Q: What packaging options are available?

A: N3431-5002RB is supplied in bulk packaging. D3431-5002-AR is supplied in trays. 71922-034LF is supplied in tubes. CWN-500-34-0021 and CWN-502-34-0021 packaging is not specified. HARTING 09185405921 is supplied in bulk packaging.

Q: Can 71922-034LF be used if operating temperature is not specified?

A: 71922-034LF operating temperature range is not provided in the specification. For applications requiring confirmed temperature performance, N3431-5002RB, D3431-5002-AR, or HARTING 09185405921 are recommended, as they specify -55°C ~ 105°C or -55°C ~ 125°C operating ranges.

Q: What is the current rating difference between substitutes?

A: The original 3M 3431-5002 and most substitutes (N3431-5002RB, D3431-5002-AR) specify 1.75A current rating. CWN-500-34-0021 and CWN-502-34-0021 specify 1A. HARTING 09185405921 and 71922-034LF do not specify current rating. For applications requiring 1.75A, 3M substitutes are recommended.

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