3M 3432-6005 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3432-6005 is a through-hole rectangular connector header with 40 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This component features shrouded 4-wall construction, wire wrap termination, and gold-plated mating contacts. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	40
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
Contact Finish - Mating	Gold
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1A
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility for the 3M 3432-6005 is determined by the following critical parameters:

Connector geometry: 40-position, 2-row configuration with 0.100" (2.54mm) pitch and row spacing
Mounting interface: Through-hole PCB mounting with shrouded 4-wall construction
Contact interface: Male pin contacts with gold-plated mating surfaces
Electrical performance: Minimum 1A current rating and -55°C to 105°C operating range
Safety compliance: UL94 V-0 flammability rating

The identified substitutes maintain these core parameters while varying in termination method, contact post material, and insulation composition. These variations are permissible provided the mating interface and electrical specifications remain compatible with the original application.

Parameter Comparison

Parameter	3M 3432-6005	3M N3432-6002RB	CW Industries CWN-570-40-0021
Manufacturer	3M	3M	CW Industries
Product Status	Obsolete	Active	Active
Connector Type	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin
Number of Positions	40	40	40
Number of Rows	2	2	2
Pitch - Mating	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)
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Mounting Type	Through Hole	Through Hole	Through Hole
Termination	Wire Wrap	Solder	Wire Wrap
Contact Finish - Mating	Gold	Gold	Gold
Contact Material	Copper Alloy	Copper Alloy	Phosphor Bronze
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C
Current Rating	1A	1.75A	1A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	Non-compliant	Compliant	ROHS3 Compliant

Engineering Selection Recommendations

3M N3432-6002RB is the primary substitute for applications requiring direct manufacturer continuity. This part maintains the 3M product line and achieves RoHS compliance. The transition from wire wrap to solder termination requires PCB design modification. The increased current rating of 1.75A provides additional margin for applications originally designed for 1A operation. The insulation material change from PBT to PCT does not affect functional compatibility within the specified operating temperature range.

CW Industries CWN-570-40-0021 provides an alternative from an established connector manufacturer. This part preserves wire wrap termination, eliminating PCB redesign requirements. The extended operating temperature range to 125°C offers enhanced thermal performance. ROHS3 compliance and REACH unaffected status satisfy modern regulatory requirements. The phosphor bronze contact material and nickel post finish differ from the original specification but maintain electrical performance within the application envelope.

Selection between these substitutes depends on termination method compatibility with existing PCB designs and regulatory compliance requirements for the end application.

Frequently Asked Questions (FAQ)

Q: Can the 3M N3432-6002RB replace the 3432-6005 in existing designs?

A: Functional replacement is possible with PCB modification. The primary difference is termination method: the N3432-6002RB uses solder termination instead of wire wrap. This requires PCB pad redesign and assembly process changes. All mating interface parameters remain identical.

Q: What is the impact of changing from wire wrap to solder termination?

A: Wire wrap termination uses post-insertion wrapping of wire around square posts. Solder termination requires through-hole PCB pads and reflow soldering. The mating interface (40 positions, 2.54mm pitch, gold-plated male pins) remains unchanged, but the PCB footprint and assembly method differ significantly.

Q: Is the CWN-570-40-0021 compatible with applications designed for the 3432-6005?

A: Yes, for applications using wire wrap termination. The CWN-570-40-0021 maintains wire wrap termination, identical pitch and position count, and equivalent electrical performance. The contact material (phosphor bronze vs. copper alloy) and extended temperature range do not affect compatibility within the original operating envelope.

Q: What are the compliance differences between these parts?

A: The original 3432-6005 is RoHS non-compliant. Both substitutes achieve RoHS compliance: N3432-6002RB is RoHS compliant, and CWN-570-40-0021 is ROHS3 compliant. For applications subject to RoHS regulations, either substitute is acceptable.

Q: Does the increased current rating of the N3432-6002RB affect compatibility?

A: No. The 1.75A rating of the N3432-6002RB exceeds the original 1A specification. Applications designed for 1A operation remain fully compatible. The higher rating provides additional design margin without requiring circuit modifications.

Q: Are there mechanical differences in the connector body?

A: The shrouded 4-wall construction, keying slot, and mounting flange are identical across all three parts. Insulation color differs (black for 3M parts, blue for CW Industries), but this is a visual identifier only and does not affect function.

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