3M 3429-2003 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3429-2003 is a through-hole rectangular connector header with 26 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This connector features shrouded 3-wall design with solder termination and push-pull fastening. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Substitute parts maintain core electrical and mechanical compatibility while offering improved availability and compliance status.

Key Parameters

Parameter	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)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Operating Temperature	-55°C ~ 105°C
Current Rating	1A
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Connector Type, Contact Type, Position Count, Row Configuration: All substitutes maintain header configuration with 26 male pins in 2-row layout
Pitch and Row Spacing: All substitutes maintain 0.100" (2.54mm) mating pitch and row spacing for mechanical compatibility
Mounting and Termination: All substitutes use through-hole mounting with solder termination
Fastening Type: All substitutes retain push-pull fastening mechanism
Operating Temperature Range: All substitutes support -55°C ~ 105°C minimum range
Flammability Rating: All substitutes meet UL94 V-0 standard
Moisture Sensitivity: All substitutes rated MSL 1 (Unlimited)

Variations in shrouding design (3-wall vs. 4-wall), contact material, contact finish specifications, and current rating do not prevent functional substitution when mating interface geometry and electrical performance requirements are met.

Parameter Comparison

Parameter	3429-2003	3429-6002	D3429-6002-AR	N3429-6002RB	CWN-360-26-0021
Manufacturer	3M	3M	3M	3M	CW Industries
Series	3000	3000	D3000	3000	CWN
Product Status	Obsolete	Obsolete	Active	Active	Active
Connector Type	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	26	26	26	26	26
Number of Rows	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)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Shrouding	Shrouded - 3 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
Termination	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)
Contact Shape	Square	Square	Square	Square	Circular
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold
Contact Material	Copper Alloy	Copper Alloy	Brass	Copper Alloy	Phosphor Bronze
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C
Current Rating (Amps)	1A	1A	1.75A	1.75A	1A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Active Production Applications:

The D3429-6002-AR and N3429-6002RB are preferred substitutes for the obsolete 3429-2003. Both parts are active status with improved compliance certifications. D3429-6002-AR offers ROHS3 compliance and higher current rating (1.75A). N3429-6002RB provides RoHS compliance with equivalent current rating upgrade (1.75A). Both maintain identical mating pitch, position count, and mechanical interface geometry.

For Extended Temperature Range Requirements:

CWN-360-26-0021 from CW Industries extends operating temperature to -55°C ~ 125°C and provides ROHS3 compliance. This part is suitable when thermal performance beyond the standard -55°C ~ 105°C range is required. Contact shape differs (circular vs. square), which may affect mating force characteristics in specific applications.

For Legacy System Compatibility:

3429-6002 maintains the original 3M 3000 series lineage and is functionally compatible with 3429-2003. However, this part retains obsolete status and non-compliant RoHS classification, limiting its use to legacy maintenance scenarios where compliance is not mandated.

Frequently Asked Questions (FAQ)

Q: Can 3429-2003 be directly replaced with D3429-6002-AR?

A: Yes. Both parts maintain identical mating pitch (0.100"), position count (26), row configuration (2 rows), and contact length (0.240" mating). The D3429-6002-AR is active status with improved compliance and higher current rating (1.75A vs. 1A).

Q: What is the difference between 3-wall and 4-wall shrouding?

A: Shrouding refers to the insulation walls surrounding the connector. The 3429-2003 uses 3-wall shrouding, while most substitutes use 4-wall design. This affects mechanical robustness and keying geometry but does not prevent functional substitution when mating interface dimensions are preserved.

Q: Are all substitutes RoHS compliant?

A: No. The 3429-6002 remains RoHS non-compliant. D3429-6002-AR, N3429-6002RB, and CWN-360-26-0021 are all RoHS compliant (ROHS3 or RoHS). Compliance status must be verified against specific application requirements.

Q: Does contact material affect substitution compatibility?

A: Contact material (Copper Alloy, Brass, Phosphor Bronze) does not prevent substitution when mating pitch and contact geometry are identical. Material selection affects electrical conductivity and mechanical properties but maintains functional compatibility at the mating interface.

Q: What packaging options are available?

A: 3429-2003 is supplied in standard packaging. Substitutes are available in Bulk (3429-6002, N3429-6002RB, CWN-360-26-0021) and Tray (D3429-6002-AR) configurations. Packaging selection depends on production volume and handling requirements.

Q: Can CWN-360-26-0021 be used in applications requiring -55°C ~ 105°C operation?

A: Yes. CWN-360-26-0021 supports -55°C ~ 125°C operating range, which exceeds the -55°C ~ 105°C requirement. The extended upper temperature limit provides additional thermal margin without affecting lower temperature performance.

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