3M 3428-2303 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3428-2303 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 latch lock/eject hooks and solder termination for board-to-board or cable applications. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

3428-2303

3MIn Stock: 9203428-2303 Datasheet

Current PartRFQ

N3428-2303RB

3MIn Stock: 776N3428-2303RB Datasheet

DirectRFQ

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 for the 3428-2303 is determined by the following critical parameters that must remain constant:

• Connector type (Header)
• Contact type (Male Pin)
• Number of positions (20) and row configuration (2 rows)
• Mating pitch (0.100" / 2.54mm)
• Row spacing (0.100" / 2.54mm)
• Mounting type (Through Hole)
• Termination method (Solder)
• Operating temperature range (-55°C ~ 105°C)
• Flammability rating (UL94 V-0)

Variations permitted in substitute parts include shrouding design (3-wall vs. 4-wall), fastening type (latch lock vs. push-pull), contact finish specifications, contact material composition, and packaging format. These variations do not affect functional compatibility in applications where the core electrical and mechanical interfaces remain unchanged.

Parameter Comparison

Engineering Selection Recommendations

N3428-2303RB provides the closest functional equivalent to the 3428-2303. Both parts share identical shrouding (3-wall), fastening mechanism (latch lock/eject hooks, long), and contact length specifications. N3428-2303RB is active in production status and ROHS3 compliant, addressing the obsolescence of the original part. The primary difference is the contact finish on the post (tin vs. tin-lead) and increased current rating (1.75A vs. 1A).

N3428-6002RB offers an alternative with enhanced shrouding (4-wall) and modified fastening (push-pull instead of latch lock). This part maintains all critical electrical and mechanical parameters while providing improved EMI shielding through 4-wall shrouding. Current rating is 1.75A and RoHS3 compliance is confirmed.

D3428-6002-AR represents the manufacturer-recommended substitute with 4-wall shrouding and push-pull fastening. This part features brass contact material and is RoHS compliant. The reduced contact finish thickness on the post (39.4µin vs. 200.0µin) and lower mating finish thickness (10.0µin vs. 30.0µin) are specified variations. D3428-6002-AR is supplied in tray packaging with the highest inventory availability (1101 pcs).

For applications requiring exact mechanical compatibility with existing mating connectors designed for latch lock fastening, N3428-2303RB is the primary selection. For new designs or applications where push-pull fastening is acceptable, N3428-6002RB or D3428-6002-AR provide enhanced performance characteristics and superior compliance status.

Frequently Asked Questions (FAQ)

Q: Can N3428-6002RB be used as a direct replacement for 3428-2303 in existing designs?

A: N3428-6002RB maintains all critical electrical and mechanical parameters (pitch, row spacing, number of positions, operating temperature, flammability rating). The primary design difference is the fastening mechanism (push-pull vs. latch lock/eject hooks). If the mating connector is designed for push-pull fastening, N3428-6002RB is compatible. If the mating connector requires latch lock fastening, N3428-2303RB is the appropriate selection.

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

A: Both 3428-2303 and N3428-2303RB feature 3-wall shrouding. N3428-6002RB and D3428-6002-AR feature 4-wall shrouding, which provides additional EMI shielding and mechanical protection. The core electrical interface remains unchanged.

Q: Are all substitute parts RoHS compliant?

A: The original 3428-2303 is RoHS non-compliant. N3428-2303RB and N3428-6002RB are ROHS3 compliant. D3428-6002-AR is RoHS compliant. For applications requiring RoHS compliance, any of the three substitute parts are acceptable.

Q: What is the significance of the current rating difference (1A vs. 1.75A)?

A: The original 3428-2303 is rated for 1A per contact. All substitute parts (N3428-2303RB, N3428-6002RB, D3428-6002-AR) are rated for 1.75A per contact. This represents an improvement in current-carrying capacity and does not create compatibility issues for applications operating within the original 1A specification.

Q: How do contact material differences affect performance?

A: The 3428-2303 uses copper alloy contacts. N3428-2303RB and N3428-6002RB also use copper alloy. D3428-6002-AR uses brass contacts. Both copper alloy and brass are suitable for the specified operating temperature range and electrical requirements. Contact finish (gold mating surface, tin or tin-lead post) is the primary factor affecting corrosion resistance and solderability.

Q: What packaging options are available?

A: N3428-2303RB and N3428-6002RB are supplied in bulk packaging. D3428-6002-AR is supplied in tray packaging. Packaging selection depends on procurement and assembly process requirements.