3M 3432-2002 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3432-2002 is a vertical rectangular connector header with 40 positions at 2.54mm pitch, designed for through-hole board-to-board or cable connections. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The connector features shrouded 3-wall design with gold-plated mating contacts and tin-lead post finish, operating across -55°C to 105°C temperature range with 1A current rating per contact.

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)
Mounting Type	Through Hole
Termination	Solder
Shrouding	Shrouded - 3 Wall
Operating Temperature	-55°C ~ 105°C
Current Rating	1A
Contact Finish - Mating	Gold
Contact Finish - Post	Tin-Lead
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the 3M 3432-2002 is determined by strict electrical and mechanical compatibility across the following parameters:

Primary Matching Criteria:

Connector type: Header (male pin)
Position count: 40 positions
Row configuration: 2 rows
Pitch: 0.100" (2.54mm) mating pitch and row spacing
Mounting: Through hole solder termination
Fastening: Push-Pull mechanism
Shrouding: Minimum 3-wall configuration
Contact finish: Gold mating surface
Operating temperature range: Minimum -55°C to 105°C
Flammability: UL94 V-0

Acceptable Variations:

Shrouding: 3-wall or 4-wall designs are interchangeable
Contact post finish: Tin, tin-lead, or solder-plated finishes are functionally equivalent
Contact material: Copper alloy or phosphor bronze are acceptable
Insulation material: PCT polyester or PBT thermoplastic compositions maintain electrical and mechanical properties
Current rating: Equal to or greater than 1A per contact
RoHS compliance: Active parts with RoHS3 compliance are preferred for new designs but do not affect mechanical substitution

The following parts meet these criteria and are direct substitutes for the 3432-2002.

Parameter Comparison

Parameter	3432-2002 (3M)	N3432-6002RB (3M)	09185406924 (HARTING)	71918-040LF (Amphenol ICC)	8428164030035 (Amphenol ICC)	CWN-350-40-0021 (CW Industries)	CWN-360-40-0021 (CW Industries)
Connector Type	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	40	40	40	40	40	40	40
Number of Rows	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)
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)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 3 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 2 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Gold	Gold, GXT™	Gold	Gold	Gold
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Solder Plated	Nickel	Nickel
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C	Not specified	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	1A	1.75A	Not specified	Not specified	1A	1A	1A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: N3432-6002RB (3M)

The N3432-6002RB is the manufacturer-recommended substitute from 3M. It maintains identical electrical and mechanical specifications to the 3432-2002 while offering improved current rating (1.75A vs. 1A), enhanced shrouding (4-wall vs. 3-wall), and RoHS compliance. This part is the direct evolutionary replacement and carries the same base product lineage (N3432 vs. 3432).

Secondary Recommendations:

09185406924 (HARTING SEK Series) - Active status with ROHS3 compliance. Offers extended operating temperature range (-55°C to 125°C) and 4-wall shrouding. Suitable for applications requiring higher temperature performance.

71918-040LF (Amphenol ICC Quickie™ Series) - Active status with RoHS compliance. Features GXT™ gold plating on mating contacts and phosphor bronze material. Packaged in tube format. Suitable for high-volume production environments.

8428164030035 (Amphenol ICC 816 Series) - Active status with RoHS compliance. Maintains 1A current rating and -55°C to 105°C operating range matching the original specification. Features 2-wall shrouding, which provides reduced mechanical protection compared to the original 3-wall design.

CWN-360-40-0021 (CW Industries) - Active status with ROHS3 compliance. Extended operating temperature (-55°C to 125°C), 4-wall shrouding, and push-pull fastening. Circular contact geometry differs from the original square contacts but maintains electrical compatibility.

Compliance Considerations:

For new designs or production requiring RoHS compliance, N3432-6002RB, 09185406924, 71918-040LF, 8428164030035, and CWN-360-40-0021 all meet ROHS3 or RoHS compliance requirements. The original 3432-2002 is RoHS non-compliant and should not be used in applications subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can I use a 4-wall shrouded connector as a substitute for the 3-wall shrouded 3432-2002?

A: Yes. The 4-wall shrouding provides enhanced mechanical protection and keying while maintaining full electrical and mechanical compatibility. The increased shrouding does not affect mating or performance in applications designed for the original 3-wall configuration.

Q: What is the difference between tin-lead and tin post finishes?

A: Both finishes are solderable and functionally equivalent for through-hole termination. Tin-lead (the original finish) contains lead and is RoHS non-compliant. Tin finish is lead-free and RoHS compliant. The choice depends on soldering process compatibility and regulatory requirements.

Q: Are circular contact connectors compatible with square contact connectors?

A: Circular and square contacts are mechanically and electrically compatible within the same pitch and row spacing. The contact geometry does not affect mating performance or signal integrity in standard applications. Selection depends on design preference and availability.

Q: Does the higher current rating of N3432-6002RB (1.75A vs. 1A) affect compatibility?

A: No. Higher current rating indicates improved performance capability and does not affect compatibility. The N3432-6002RB can safely carry the same 1A loads as the original part while providing additional capacity margin for future design requirements.

Q: What is the significance of the extended temperature range (-55°C to 125°C) in substitute parts?

A: Extended temperature range indicates broader operational capability. Parts rated to 125°C can be used in applications requiring only -55°C to 105°C operation without performance degradation. This provides design flexibility for applications with varying thermal requirements.

Q: How does packaging format (Bulk vs. Tube) affect part selection?

A: Packaging format affects handling, storage, and production workflow but does not impact electrical or mechanical performance. Bulk packaging suits high-volume automated assembly. Tube packaging suits lower-volume or manual assembly processes. Select based on production requirements.

Q: Are all substitute parts available in equivalent inventory quantities?

A: Inventory availability varies by supplier and part number. Verify current stock levels with component distributors before finalizing design selections, particularly for production commitments.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message