3M 3429-6302-UG Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3429-6302-UG is a shrouded rectangular connector header with 26 positions, 2 rows, and 0.100" (2.54mm) pitch designed for through-hole mounting with solder termination. This connector features male pins with gold-plated mating contacts and tin-lead plated posts, operating across -55°C to 105°C. The part is classified as obsolete, necessitating identification of functionally equivalent active alternatives that maintain electrical and mechanical compatibility for board-to-board or board-to-cable applications.

Key Parameters

Parameter	3429-6302-UG Value
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)
Shrouding	Shrouded - 4 Wall
Mounting Type	Through Hole
Termination	Solder
Contact Shape	Square
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
Current Rating	1A

Substitute Part Grouping Explanation

Substitution validity is determined by strict equivalence across the following critical parameters:

Connector Type, Contact Type, Position Count, Row Configuration: All substitutes must be headers with male pins, 26 positions in 2 rows
Pitch and Row Spacing: All substitutes maintain 0.100" (2.54mm) mating pitch and row spacing
Shrouding and Mounting: All substitutes feature 4-wall shrouding and through-hole mounting with solder termination
Contact Shape and Finish: All substitutes use square contacts with gold mating finish
Operating Temperature Range: All substitutes support -55°C to 105°C minimum
Flammability Rating: All substitutes meet UL94 V-0

Substitutes are grouped by fastening mechanism (Push-Pull vs. Latch Lock/Eject Hooks) and contact material composition, as these represent design variations within the same functional category. Variations in contact finish thickness, post material, and insulation material do not preclude substitution when all primary electrical and mechanical parameters align.

Parameter Comparison

Parameter	3429-6302-UG	3429-6002	D3429-6002-AR	N3429-6002RB	499206-6	5102321-6	53611-S26-4LF	53611-S26-6LF	5499206-6	5499923-6
Manufacturer	3M	3M	3M	3M	TE Connectivity	TE Connectivity	Amphenol ICC	Amphenol ICC	TE Connectivity	TE Connectivity
Connector Type	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
Number of Positions	26	26	26	26	26	26	26	26	26	26
Number of Rows	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)
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)
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
Mounting Type	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
Fastening Type	Latch Lock/Eject Hooks, Long	Push-Pull	Push-Pull	Push-Pull	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Long
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold-Palladium	Gold or Gold-Palladium
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C	-	-	-65°C ~ 105°C	-65°C ~ 105°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
Current Rating	1A	1A	1.75A	1.75A	1A	1A per Contact	-	-	1A	1A per Contact
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	Not applicable	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: D3429-6002-AR

The D3429-6002-AR is the preferred substitute for the obsolete 3429-6302-UG. This part maintains full electrical and mechanical compatibility while offering active product status and ROHS3 compliance. The D3429-6002-AR features identical connector geometry, pitch, shrouding, and mounting configuration. The increased current rating of 1.75A provides enhanced performance margin. The part is available in tray packaging with 1805 units in stock.

Secondary Recommendations: N3429-6002RB, 3429-6002

The N3429-6002RB provides an alternative from the 3M 3000 series with active status and RoHS compliance. The 3429-6002 maintains the same series designation but carries obsolete status. Both parts support the same electrical specifications and mechanical interface as the original part.

TE Connectivity AMP-Latch Series: 5499206-6, 5499923-6, 499206-6, 5102321-6

These TE Connectivity parts from the AMP-Latch series provide functionally equivalent alternatives with active product status and ROHS3 compliance. The 5499206-6 offers the highest inventory availability (31,289 units). These parts feature identical pitch, position count, and shrouding but employ latch lock/eject hook fastening mechanisms. Operating temperature extends to -65°C, providing broader environmental coverage. Voltage rating of 250VAC is specified for TE parts.

Amphenol ICC Quickie™ Series: 53611-S26-4LF, 53611-S26-6LF

The Amphenol ICC Quickie™ series connectors provide active alternatives with RoHS compliance. These parts maintain the 26-position, 2.54mm pitch configuration with latch lock/eject hook fastening. Contact material is phosphor bronze with tin plating on posts. Operating temperature range is not specified in available data.

Compliance Considerations

For applications requiring RoHS compliance, D3429-6002-AR, N3429-6002RB, 5499206-6, 5499923-6, 53611-S26-4LF, and 53611-S26-6LF are suitable. The original 3429-6302-UG and 3429-6002 are RoHS non-compliant and should be replaced in new designs targeting regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 3429-6302-UG be directly replaced with any of these substitutes?

A: Yes, all listed substitutes maintain electrical and mechanical compatibility across critical parameters: 26 positions, 2 rows, 0.100" (2.54mm) pitch, shrouded 4-wall configuration, through-hole solder termination, and square gold-plated mating contacts. Physical board layout compatibility is maintained. Fastening mechanism differences (Push-Pull vs. Latch Lock/Eject Hooks) do not affect electrical function but may influence mating force and connector retention characteristics.

Q: What is the difference between Push-Pull and Latch Lock/Eject Hooks fastening?

A: Push-Pull fastening (3429-6002, D3429-6002-AR, N3429-6002RB) uses a simple push-to-mate, pull-to-disconnect mechanism. Latch Lock/Eject Hooks fastening (499206-6, 5102321-6, 53611-S26-4LF, 53611-S26-6LF, 5499206-6, 5499923-6) provides positive mechanical locking with ejector hooks for controlled disconnection. Both mechanisms are functionally equivalent for signal transmission but differ in user interface and retention force.

Q: Are there packaging differences between substitutes?

A: Yes. The original 3429-6302-UG is supplied in unspecified packaging. Substitutes are available in Bulk (3429-6002, 5499923-6), Tray (D3429-6002-AR, 499206-6, 5102321-6, 53611-S26-4LF, 53611-S26-6LF, 5499206-6), or both. Packaging selection affects handling, storage, and reel compatibility in automated assembly processes. Verify packaging requirements for your manufacturing environment.

Q: What is the significance of contact finish thickness variations?

A: Contact finish thickness affects durability and mating cycle life. The original part specifies 15.0µin (0.38µm) mating finish. Substitutes range from 10.0µin to 30.0µin. Thicker finishes generally provide longer service life in high-cycle applications. For standard applications, all specified thicknesses are functionally equivalent and meet UL94 V-0 flammability requirements.

Q: Which substitute offers the best compliance profile for new designs?

A: D3429-6002-AR offers the optimal compliance profile: ROHS3 compliant, active product status, 1805 units in stock, and full electrical/mechanical equivalence. For applications requiring extended temperature range (-65°C vs. -55°C), the TE Connectivity AMP-Latch series (5499206-6, 5499923-6) provides superior environmental coverage with ROHS3 compliance.

Q: Are there current rating differences that affect circuit design?

A: The original 3429-6302-UG is rated at 1A per contact. D3429-6002-AR and N3429-6002RB increase this to 1.75A per contact, providing design margin. TE Connectivity and Amphenol parts maintain 1A per contact rating. For applications operating near the 1A limit, upgraded parts offer improved reliability margin. Verify total circuit current against per-contact ratings for multi-contact applications.

Q: Can substitutes be mixed in the same assembly?

A: All substitutes are mechanically and electrically compatible with each other and the original part. However, mixing different fastening mechanisms (Push-Pull vs. Latch Lock) in the same assembly may create inconsistent user experience and mating force characteristics. Standardize on a single substitute part number per assembly for consistency.

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