3M 3432-2203 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3432-2203 is a through-hole rectangular connector header with 40 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The connector features shrouded 3-wall construction with solder termination and is suitable for board-to-board or cable applications in industrial and commercial electronics.

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
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1A
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 3432-2203 is determined by the following critical parameters:

Connector Type & Contact Configuration: Header with male pins
Position Count & Row Configuration: 40 positions in 2 rows
Pitch Specification: 0.100" (2.54mm) mating pitch and row spacing
Mounting & Termination: Through-hole solder termination
Environmental Rating: UL94 V-0 flammability compliance and MSL 1 rating
Operating Temperature: Minimum -55°C ~ 105°C range

The identified substitute parts meet these core electrical and mechanical requirements. Variations in shrouding design (3-wall vs. 4-wall), fastening mechanism (latch lock vs. push-pull), contact finish specifications, and current rating enhancements do not preclude substitution when the primary functional parameters align.

Parameter Comparison

Parameter	3432-2203 (Main)	N3432-6002RB	CWN-361-40-0021
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)
Mounting Type	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder
Shrouding	Shrouded - 3 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Latch Lock/Eject Hooks, Short	Push-Pull	Latch Lock/Eject Hooks, Short
Contact Finish - Mating	Gold	Gold	Gold
Contact Finish - Post	Tin-Lead	Tin	Nickel
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
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Non-compliant	Compliant	ROHS3 Compliant

Engineering Selection Recommendations

N3432-6002RB (3M) is the primary substitute for the 3432-2203. Both components share identical pitch, position count, row configuration, and operating temperature range. The N3432-6002RB is an active product with RoHS compliance, addressing the obsolescence of the original part. The enhanced current rating (1.75A vs. 1A) and improved shrouding design (4-wall) provide functional advantages. The push-pull fastening mechanism differs from the original latch lock design but maintains mechanical compatibility for standard applications.

CWN-361-40-0021 (CW Industries) serves as an alternative substitute when cross-manufacturer sourcing is required. This connector maintains all critical electrical and mechanical parameters, including 40-position 2-row configuration at 0.100" pitch and through-hole solder termination. The extended operating temperature range (-55°C ~ 125°C) exceeds the original specification. Contact material composition (phosphor bronze vs. copper alloy) and post finish (nickel vs. tin-lead) represent material variations that do not affect functional substitution for standard applications. ROHS3 compliance and active product status support long-term availability.

Frequently Asked Questions (FAQ)

Q: Can the N3432-6002RB directly replace the 3432-2203 in existing designs?

A: Yes. Both connectors share identical pitch (0.100"), position count (40), row configuration (2 rows), and mounting method (through-hole solder). The N3432-6002RB is mechanically and electrically compatible. Design review is recommended if the original fastening mechanism (latch lock) is critical to the application, as the N3432-6002RB uses push-pull fastening.

Q: What are the key differences between the 3M substitutes and the CW Industries alternative?

A: The 3M N3432-6002RB maintains manufacturer continuity and identical operating temperature range. The CW Industries CWN-361-40-0021 offers an extended temperature range (-55°C ~ 125°C) and alternative contact materials (phosphor bronze). Both meet UL94 V-0 and MSL 1 requirements. Selection depends on supply chain strategy and temperature margin requirements.

Q: Are there packaging or inventory considerations for these substitutes?

A: The N3432-6002RB is available in bulk packaging with 791 pieces in stock. The CWN-361-40-0021 is available with 671 pieces in stock. Packaging format should be confirmed against procurement requirements.

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

A: No. A higher current rating indicates improved capability and does not create compatibility issues. The substitute can safely handle applications designed for the original 1A rating.

Q: Are RoHS compliance differences significant for substitution?

A: The original 3432-2203 is RoHS non-compliant. Both substitutes (N3432-6002RB and CWN-361-40-0021) are RoHS compliant. For applications subject to RoHS regulations, the substitutes provide regulatory advantage. For legacy systems without RoHS requirements, compliance status does not affect electrical or mechanical function.

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