3M 3428-25K2 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3428-25K2 is a shrouded rectangular connector header designed for through-hole mounting in board-to-board or cable applications. This connector features 20 positions arranged in 2 rows with 0.100" (2.54mm) pitch spacing. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

3428-25K2

3MIn Stock: 11893428-25K2 Datasheet

Current PartRFQ

D3428-6002-AR

3MIn Stock: 1201D3428-6002-AR Datasheet

MFR RecommendedRFQ

N3428-6002RB

3MIn Stock: 1411N3428-6002RB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3428-25K2 is determined by the following critical parameters:

• Connector geometry: 20-position, 2-row configuration with 0.100" (2.54mm) pitch and row spacing
• Mounting interface: Through-hole termination with press-fit or solder capability
• Electrical performance: Current rating of 1A or higher
• Environmental compliance: Operating temperature range of -55°C ~ 105°C minimum
• Safety certification: UL94 V-0 flammability rating

The substitute parts D3428-6002-AR and N3428-6002RB meet these core requirements while offering enhanced specifications in shrouding design, fastening mechanisms, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both D3428-6002-AR and N3428-6002RB are active production alternatives to the obsolete 3428-25K2. Selection between these substitutes depends on regulatory and compliance requirements:

D3428-6002-AR is suitable for applications requiring RoHS compliance. This part features 4-wall shrouding and push-pull fastening, with a higher current rating of 1.75A. The contact material is brass with reduced gold plating thickness on the mating surface.

N3428-6002RB is suitable for applications requiring ROHS3 compliance and offers the highest current rating at 1.75A. This part maintains copper alloy contact material consistent with the original 3428-25K2 and features 4-wall shrouding with push-pull fastening. Packaging is provided in bulk format.

Both substitutes maintain identical mechanical dimensions, pitch spacing, and operating temperature range as the original part, ensuring direct form-fit-function compatibility in through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can D3428-6002-AR or N3428-6002RB be used as direct replacements for 3428-25K2 in existing designs?

A: Yes. Both substitutes maintain identical connector geometry, pitch spacing (0.100" / 2.54mm), row configuration (2 rows, 20 positions), and mounting interface. PCB footprints and mating connector compatibility are preserved.

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

A: The original 3428-25K2 features 3-wall shrouding. Both substitutes feature 4-wall shrouding, which provides enhanced mechanical protection and improved mating alignment. This is a design enhancement that does not affect electrical performance or mechanical compatibility.

Q: How do the fastening mechanisms differ?

A: The 3428-25K2 uses latch lock/eject hooks with short fastening. Both substitutes use push-pull fastening, which provides a different engagement and release mechanism. Mating connectors must be compatible with push-pull fastening.

Q: What is the significance of the current rating increase from 1A to 1.75A?

A: Both substitutes support higher current capacity than the original part. This represents an enhancement and does not restrict use in applications designed for 1A operation. Applications requiring currents between 1A and 1.75A benefit from the increased rating margin.

Q: Are there compliance differences between D3428-6002-AR and N3428-6002RB?

A: D3428-6002-AR is RoHS compliant. N3428-6002RB is ROHS3 compliant, which represents a more recent regulatory standard. Both meet UL94 V-0 flammability requirements and operate across the same temperature range (-55°C ~ 105°C).

Q: What packaging options are available?

A: The original 3428-25K2 is packaged in standard format. D3428-6002-AR is supplied in trays. N3428-6002RB is supplied in bulk. Packaging selection depends on procurement volume and handling requirements.

Q: Are the contact materials interchangeable?

A: The 3428-25K2 and N3428-6002RB both use copper alloy contacts. D3428-6002-AR uses brass contacts. Both materials are suitable for the specified operating conditions and current ratings. Contact material selection does not affect mechanical compatibility.