3M 3433-2003 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3433-2003 is a through-hole rectangular connector header with 50 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This connector is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part features shrouded 3-wall construction, gold-plated mating contacts, and tin-lead post finish, suitable for board-to-board or cable applications in industrial and commercial electronics.

Substiute Parts

3433-2003

3MIn Stock: 11413433-2003 Datasheet

Current PartRFQ

D3433-6002-AR

3MIn Stock: 1293D3433-6002-AR Datasheet

MFR RecommendedRFQ

N3433-6002RB

3MIn Stock: 1326N3433-6002RB Datasheet

MFR RecommendedRFQ

CWN-360-50-0021

CW IndustriesIn Stock: 1132CWN-360-50-0021 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3433-2003 is determined by the following critical parameters:

• Connector Type, Contact Type, Number of Positions, Rows, and Pitch: All substitute parts must maintain identical values (Header, Male Pin, 50 positions, 2 rows, 0.100" pitch)
• Mounting Type and Termination: Must remain Through Hole with Solder termination
• Operating Temperature Range: Substitute parts must support the full -55°C to 105°C range or exceed it
• Material Flammability Rating: UL94 V-0 compliance is required
• Shrouding Configuration: Acceptable variations include 3-wall or 4-wall shrouding, as both provide equivalent keying and mechanical protection
• Contact Material and Finish: Variations in contact material (Copper Alloy, Brass, Phosphor Bronze) and finish specifications are permissible provided electrical performance is maintained
• Current Rating: Substitute parts with equal or higher current ratings (≥1A) are acceptable
• RoHS and Compliance Status: Active product status and current compliance certifications are preferred for new designs

Three substitute parts meet these criteria and are listed below.

Parameter Comparison

Engineering Selection Recommendations

D3433-6002-AR (3M, Active): This part is the manufacturer-recommended substitute. It maintains identical pitch, position count, and row configuration. The 4-wall shrouding provides enhanced mechanical protection compared to the 3-wall design of the original part. Current rating increases to 1.75A, supporting higher-load applications. ROHS3 compliance makes this part suitable for new designs and regulated markets. Contact post length is reduced to 0.112", which may require PCB design verification for solder joint geometry. Brass contact material with reduced gold plating thickness (10.0µin) is acceptable for standard signal applications.

N3433-6002RB (3M, Active): This part maintains the original series designation (3000 base) and offers full compatibility with the 3433-2003 in terms of mechanical and electrical parameters. The 4-wall shrouding and 1.75A current rating match the D3433-6002-AR. RoHS compliance and bulk packaging support high-volume production. Contact post length of 0.112" requires the same PCB design consideration as D3433-6002-AR. Copper alloy contact material with standard tin finish provides cost-effective performance.

CWN-360-50-0021 (CW Industries, Active): This cross-manufacturer substitute maintains all critical electrical and mechanical parameters. The extended operating temperature range (-55°C to 125°C) provides additional thermal margin. Contact post length of 0.155" matches the original part, eliminating PCB design changes. Circular contact geometry and phosphor bronze material with nickel finish offer alternative contact characteristics. ROHS3 compliance and thermoplastic insulation material support modern manufacturing standards. Current rating of 1A matches the original specification.

Frequently Asked Questions (FAQ)

Q: Can D3433-6002-AR be used as a direct replacement for 3433-2003?

A: D3433-6002-AR is electrically and mechanically compatible. The primary design consideration is the reduced contact post length (0.112" vs. 0.155"), which may affect solder joint formation on PCBs designed for the original part. PCB pad geometry and solder reflow profiles should be verified before production implementation.

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

A: Both configurations provide keying and mechanical protection. The 4-wall shrouding in D3433-6002-AR and N3433-6002RB offers additional side wall coverage, improving mechanical robustness and EMI shielding characteristics. The 3-wall design of the original part and CWN-360-50-0021 provides equivalent functionality for standard applications.

Q: Are there RoHS compliance differences between the substitutes?

A: The original 3433-2003 is RoHS non-compliant. All three substitute parts (D3433-6002-AR, N3433-6002RB, and CWN-360-50-0021) are RoHS3 compliant, making them suitable for applications requiring environmental compliance certification.

Q: Does the contact material difference affect electrical performance?

A: Contact materials (Copper Alloy, Brass, Phosphor Bronze) and finish specifications (Gold, Tin, Nickel) are selected to meet signal integrity and current-carrying requirements. All substitute parts maintain equivalent electrical performance for standard 1A to 1.75A applications. Material selection may influence contact resistance and long-term reliability in high-cycle mating environments.

Q: Which substitute part should be selected for new designs?

A: D3433-6002-AR is the manufacturer-recommended substitute and represents the direct evolution of the 3433-2003 within the 3M product line. For applications requiring extended thermal performance, CWN-360-50-0021 offers -55°C to 125°C operation. N3433-6002RB provides cost-effective compatibility with identical electrical specifications.

Q: What packaging options are available?

A: D3433-6002-AR is supplied in Tray packaging. N3433-6002RB and CWN-360-50-0021 are supplied in Bulk packaging. Packaging selection should align with production volume and automated assembly requirements.