3M 3428-2003 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3428-2003 is a through-hole rectangular connector header with 20 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This connector features shrouded 3-wall design with male pins, gold-plated mating contacts, and tin-lead post finish. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Active alternatives with improved specifications and compliance certifications are available.

Substiute Parts

3428-2003

3MIn Stock: 9733428-2003 Datasheet

Current PartRFQ

D3428-6002-AR

3MIn Stock: 1201D3428-6002-AR Datasheet

MFR RecommendedRFQ

N3428-6002RB

3MIn Stock: 1411N3428-6002RB Datasheet

MFR RecommendedRFQ

CWN-360-20-0021

CW IndustriesIn Stock: 862CWN-360-20-0021 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3428-2003 is determined by the following critical parameters:

• Connector configuration: 20-position, 2-row header with 0.100" (2.54mm) mating pitch and row spacing
• Contact type: Male pin configuration
• Mounting method: Through-hole solder termination
• Shrouding design: Shrouded construction with keying slot and mounting flange
• Electrical performance: Current rating and operating temperature range
• Mechanical compatibility: Overall contact length, insulation height, and contact shape

The three substitute parts listed below meet these core requirements with variations in shrouding wall count, contact material composition, post finish specifications, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

D3428-6002-AR (3M D3000 Series): This part is the manufacturer-recommended substitute with active product status. It provides improved RoHS compliance and increased current rating (1.75A vs. 1A). The 4-wall shrouding offers enhanced mechanical protection compared to the 3-wall design of the original part. The reduced post contact length (0.112" vs. 0.155") requires verification for PCB pad compatibility. Brass contact material with tin post finish provides reliable solder joint formation. Tray packaging supports automated assembly processes.

N3428-6002RB (3M 3000 Series): This part maintains the original 3M 3000 series designation with active product status and ROHS3 compliance. It offers the same 4-wall shrouding and increased current rating as the D3428-6002-AR. Copper alloy contact material with tin post finish and 200.0µin thickness provides robust electrical performance. Bulk packaging is suitable for high-volume applications. The reduced post contact length matches the D3428-6002-AR specification.

CWN-360-20-0021 (CW Industries CWN Series): This alternative from CW Industries provides active product status with ROHS3 compliance and extended operating temperature range (-55°C ~ 125°C). The circular contact shape differs from the square contacts of the original part, requiring mechanical compatibility assessment. Phosphor bronze contact material with nickel post finish offers corrosion resistance. The post contact length (0.155") matches the original specification, minimizing PCB redesign requirements. Current rating remains at 1A.

All three substitutes maintain the critical 20-position, 2-row configuration with 0.100" (2.54mm) pitch and through-hole solder termination. Selection should prioritize compliance requirements, packaging needs, and mechanical fit constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the 3428-2003 be directly replaced with D3428-6002-AR without PCB modification?

A: The D3428-6002-AR has a reduced post contact length (0.112" vs. 0.155"), which may require PCB pad depth adjustment. Verify pad specifications before substitution. The 4-wall shrouding is mechanically compatible with the original 3-wall design.

Q: What is the primary difference between D3428-6002-AR and N3428-6002RB?

A: Both parts share identical electrical and mechanical specifications. The primary differences are manufacturer series designation (D3000 vs. 3000), packaging format (Tray vs. Bulk), and contact material (Brass vs. Copper Alloy). Both provide 1.75A current rating and ROHS compliance.

Q: Is CWN-360-20-0021 compatible with applications requiring square contact geometry?

A: No. The CWN-360-20-0021 features circular contacts, while the original 3428-2003 uses square contacts. Circular contacts may not mate properly with receptacles designed for square pin geometry. Verify mating connector specifications before selection.

Q: Does the increased current rating (1.75A) of D3428-6002-AR and N3428-6002RB affect circuit design?

A: The increased current rating indicates improved contact performance and thermal characteristics. Existing circuits designed for 1A operation remain compatible. The higher rating provides additional design margin for future applications.

Q: What are the RoHS compliance implications for the 3428-2003 replacement?

A: The original 3428-2003 is RoHS non-compliant due to tin-lead post finish. All three substitutes (D3428-6002-AR, N3428-6002RB, and CWN-360-20-0021) are RoHS or ROHS3 compliant, meeting current regulatory requirements for new designs and production.

Q: How does the extended operating temperature range of CWN-360-20-0021 (-55°C ~ 125°C) compare to the original specification?

A: The CWN-360-20-0021 provides 20°C additional high-temperature capability. Applications operating within the original -55°C ~ 105°C range remain fully compatible. The extended range offers design flexibility for higher-temperature environments.

Q: Are packaging differences between Tray (D3428-6002-AR) and Bulk (N3428-6002RB, CWN-360-20-0021) significant for component selection?

A: Packaging affects handling, storage, and automated assembly compatibility. Tray packaging supports pick-and-place equipment integration. Bulk packaging requires manual handling or custom feeder systems. Select based on production assembly methodology and inventory management requirements.