3M 3429-6203 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3429-6203 is a through-hole rectangular connector header with 26 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The connector features shrouded 4-wall construction with solder termination and latch lock/eject hook fastening. Identifying compatible alternatives ensures design continuity and supply chain flexibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	3429-6203
Manufacturer	3M
Category	Rectangular Connectors
Connector Type	Header
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
Termination	Solder
Shrouding	Shrouded - 4 Wall
Fastening Type	Latch Lock/Eject Hooks, Short
Operating Temperature Range	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
Current Rating	1A
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 3M 3429-6203 is determined by strict alignment of the following critical parameters:

Primary Matching Criteria:

Number of positions: 26
Number of rows: 2
Pitch - mating: 0.100" (2.54mm)
Row spacing - mating: 0.100" (2.54mm)
Connector type: Header
Contact type: Male Pin
Mounting type: Through Hole
Termination: Solder
Shrouding: Shrouded - 4 Wall
Material flammability rating: UL94 V-0

Secondary Compatibility Factors:

Operating temperature range (minimum -55°C, maximum ≥105°C)
Contact shape: Square
Contact finish - mating: Gold
Insulation material: Glass-filled polyester or polyester variants
Features: Keying slot, mounting flange

Substitute parts must maintain compatibility across all primary criteria. Variations in fastening type (Push-Pull vs. Latch Lock/Eject Hooks), contact post length, insulation height, and contact material composition are permissible when other parameters align. Parts from alternative manufacturers (HARTING) qualify as substitutes when they satisfy the primary matching criteria and maintain functional equivalence in board-to-board or board-to-cable applications.

Parameter Comparison

Parameter	3429-6203	3429-6002	D3429-6002-AR	N3429-6002RB	09185265902	09185265912	09185265914	09185266902	09185266904	09185266912	09185266914
Manufacturer	3M	3M	3M	3M	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING
Number of Positions	26	26	26	26	26	26	26	26	26	26	26
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
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)	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)	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)
Connector Type	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Latch Lock/Eject Hooks, Short	Push-Pull	Push-Pull	Push-Pull	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short
Operating Temperature Range	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°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	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: D3429-6002-AR

The D3429-6002-AR represents the most direct upgrade path from the obsolete 3429-6203. This part maintains 3M manufacturer continuity, belongs to the active D3000 series, and achieves ROHS3 compliance. The higher current rating of 1.75A provides enhanced electrical capacity compared to the original 1A specification. The part is available in tray packaging with 1805 units in stock, supporting production requirements.

Secondary Recommendation: N3429-6002RB

The N3429-6002RB offers an alternative within the 3M product ecosystem. This active part achieves RoHS compliance and delivers 1.75A current rating. It maintains the same 26-position, 2-row configuration with 0.100" pitch and through-hole solder termination. Bulk packaging availability with 1077 units in stock provides flexibility for high-volume applications.

Alternative Manufacturer Option: HARTING SEK Series

The HARTING SEK series connectors (09185265902, 09185265912, 09185265914, 09185266902, 09185266904, 09185266912, 09185266914) provide cross-manufacturer substitution. All HARTING parts achieve ROHS3 compliance and support extended operating temperature to 125°C. Selection within the HARTING lineup depends on specific fastening type requirements (latch lock/eject hooks with long or short variants) and contact post length specifications. These parts are active products with inventory ranging from 686 to 1351 units.

Compliance Consideration:

The original 3429-6203 is RoHS non-compliant. All recommended substitutes achieve either RoHS or ROHS3 compliance, supporting modern regulatory requirements and supply chain standards.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 3429-6203 with 3429-6002?

A: Yes, the 3429-6002 is a direct functional equivalent. Both parts share identical position count (26), row configuration (2), pitch (0.100"), mounting type (through hole), and termination method (solder). The primary difference is fastening type: 3429-6203 uses latch lock/eject hooks (short), while 3429-6002 uses push-pull fastening. Both are obsolete, so D3429-6002-AR is preferred for new designs.

Q: What is the difference between 3M and HARTING substitutes?

A: Both manufacturers provide 26-position, 2-row headers at 0.100" pitch with identical electrical and mechanical compatibility. 3M parts (3429-6002, D3429-6002-AR, N3429-6002RB) maintain original design continuity. HARTING SEK series parts offer extended operating temperature (125°C vs. 105°C) and alternative fastening configurations. Selection depends on supply availability, packaging requirements, and fastening type preference.

Q: Are there differences in contact post length among substitutes?

A: Yes. The original 3429-6203 has a contact post length of 0.155" (3.94mm). Substitutes vary: 3429-6002, D3429-6002-AR, and N3429-6002RB use 0.112" (2.84mm); HARTING 09185265902, 09185266902, and 09185266912 use 0.177" (4.50mm); HARTING 09185265914 and 09185266904 use 0.114" (2.90mm). Verify PCB pad depth compatibility before selection.

Q: Which substitute offers the best compliance status?

A: All recommended substitutes achieve ROHS3 or RoHS compliance, exceeding the original non-compliant status. D3429-6002-AR and all HARTING SEK series parts are ROHS3 compliant. N3429-6002RB is RoHS compliant. For regulatory-sensitive applications, ROHS3 compliance is preferred.

Q: What packaging options are available?

A: 3429-6002 is supplied in bulk packaging. D3429-6002-AR is supplied in tray packaging. N3429-6002RB is supplied in bulk packaging. HARTING parts are supplied in bulk or tray configurations depending on specific part number. Verify packaging requirements for your assembly process.

Q: Can I use HARTING parts as direct substitutes in existing designs?

A: HARTING SEK series parts are functionally equivalent for board-to-cable applications. Verify fastening type compatibility: HARTING parts use latch lock/eject hooks (long or short variants), while some 3M alternatives use push-pull fastening. Contact post length and insulation height variations require PCB pad and mating connector verification.

Q: What is the current rating difference between substitutes?

A: The original 3429-6203 is rated at 1A. D3429-6002-AR and N3429-6002RB are rated at 1.75A, providing higher current capacity. HARTING parts do not specify current rating in the provided data. For applications requiring 1A operation, all substitutes are suitable. For higher current applications, 3M D3429-6002-AR or N3429-6002RB are recommended.

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