3M 3428-6303 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3428-6303 is a through-hole rectangular connector header with 20 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This connector features shrouded 4-wall construction with latch lock/eject hooks and is designed 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.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	20
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Shrouding	Shrouded - 4 Wall
Mounting Type	Through Hole
Termination	Solder
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
Current Rating	1A
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 3428-6303 is determined by strict alignment of the following core parameters:

Connector Type & Contact Configuration: Header with male pins
Position Count & Arrangement: 20 positions in 2 rows
Pitch Specification: 0.100" (2.54mm) mating pitch and row spacing
Shrouding & Mechanical Design: Shrouded 4-wall construction
Mounting & Termination: Through-hole solder termination
Operating Temperature Range: -55°C ~ 105°C minimum
Flammability Rating: UL94 V-0
Moisture Sensitivity: MSL 1

Substitute parts are grouped into two categories:

Category A - Direct 3M Series Equivalents: Parts N3428-6303RB and N3428-6002RB maintain the 3M 3000 series platform with identical mechanical and electrical specifications. These parts differ in fastening type (push-pull vs. latch lock) and contact finish post material (tin vs. tin-lead), but retain full functional compatibility.

Category B - Cross-Manufacturer Alternatives: TE Connectivity AMP-Latch series (102321-4, 2-5102321-4, 2-5499206-4, 499206-4, 499922-4) and Amphenol ICC Quickie™ series (53611-S20-4LF, 53611-S20-6LF) provide equivalent 20-position 2.54mm pitch headers with shrouded construction. These parts meet the same mechanical envelope and electrical performance requirements.

Category C - Enhanced Performance Variant: The 3M D3428-6002-AR (D3000 series) offers improved current rating (1.75A vs. 1A) and RoHS compliance while maintaining identical pitch, position count, and shrouding specifications.

Parameter Comparison

Part Number	Manufacturer	Series	Positions	Pitch (mm)	Fastening Type	Contact Finish - Post	Current Rating (A)	Operating Temp (°C)	RoHS Status	Product Status
3428-6303	3M	3000	20 (2x10)	2.54	Latch Lock/Eject Hooks, Long	Tin-Lead	1.0	-55 to 105	Non-compliant	Obsolete
N3428-6303RB	3M	3000	20 (2x10)	2.54	Latch Lock/Eject Hooks, Long	Tin	1.75	-55 to 105	ROHS3 Compliant	Active
N3428-6002RB	3M	3000	20 (2x10)	2.54	Push-Pull	Tin	1.75	-55 to 105	ROHS3 Compliant	Active
D3428-6002-AR	3M	D3000	20 (2x10)	2.54	Push-Pull	Tin	1.75	-55 to 105	RoHS Compliant	Active
102321-4	TE Connectivity AMP	AMP-Latch	20 (2x10)	2.54	Latch Lock/Eject Hooks, Long	Tin-Lead	1.0	-65 to 105	Non-compliant	Active
2-5102321-4	TE Connectivity AMP	AMP-Latch	20 (2x10)	2.54	Latch Lock/Eject Hooks, Long	Tin	1.0	-65 to 105	ROHS3 Compliant	Active
2-5499206-4	TE Connectivity AMP	AMP-Latch	20 (2x10)	2.54	Latch Lock/Eject Hooks, Long	Tin	1.0	-65 to 105	ROHS3 Compliant	Active
499206-4	TE Connectivity AMP	AMP-Latch	20 (2x10)	2.54	Latch Lock/Eject Hooks, Long	Tin-Lead	1.0	-65 to 105	Non-compliant	Active
499922-4	TE Connectivity AMP	AMP-Latch	20 (2x10)	2.54	Latch Lock/Eject Hooks, Long	Tin-Lead	1.0	-65 to 105	Non-compliant	Active
53611-S20-4LF	Amphenol ICC (FCI)	Quickie™	20 (2x10)	2.54	Latch Lock/Eject Hooks	Tin	Not specified	Not specified	RoHS Compliant	Active
53611-S20-6LF	Amphenol ICC (FCI)	Quickie™	20 (2x10)	2.54	Latch Lock/Eject Hooks	Tin	Not specified	Not specified	RoHS Compliant	Active

Engineering Selection Recommendations

For Direct Replacement with Enhanced Compliance: Select N3428-6303RB. This part maintains identical mechanical compatibility with the 3428-6303 while offering ROHS3 compliance, improved current rating (1.75A), and active product status. The latch lock/eject hook fastening type matches the original design.

For RoHS-Compliant Designs with Fastening Flexibility: Choose between N3428-6002RB (push-pull fastening) or D3428-6002-AR (push-pull fastening, tray packaging). Both provide 1.75A current rating and full RoHS compliance. The D3428-6002-AR offers the additional advantage of D3000 series platform designation.

For Cross-Manufacturer Alternatives with Active Support: TE Connectivity AMP-Latch series parts (102321-4, 2-5102321-4, 2-5499206-4, 499206-4, 499922-4) provide equivalent 20-position 2.54mm pitch headers. The ROHS3-compliant variants (2-5102321-4, 2-5499206-4) are preferred for new designs. These parts maintain latch lock/eject hook fastening and are suitable for board-to-cable/wire applications.

For High-Volume Applications: Amphenol ICC Quickie™ series (53611-S20-6LF) offers the highest inventory availability (2618 pcs) and RoHS compliance. The 53611-S20-6LF variant features 0.150" (3.81mm) contact post length, matching the original 3428-6303 specification more closely than the 53611-S20-4LF variant.

Compliance Considerations: For new designs subject to RoHS requirements, avoid 3428-6303, 102321-4, 499206-4, and 499922-4 due to non-compliance status. Prioritize ROHS3-compliant alternatives: N3428-6303RB, N3428-6002RB, D3428-6002-AR, 2-5102321-4, 2-5499206-4, 53611-S20-4LF, and 53611-S20-6LF.

Frequently Asked Questions (FAQ)

Q: Can N3428-6303RB be used as a direct drop-in replacement for the obsolete 3428-6303?

A: Yes. N3428-6303RB maintains identical mechanical dimensions, pitch (2.54mm), position count (20), shrouding (4-wall), and fastening type (latch lock/eject hooks, long). The primary differences are improved current rating (1.75A vs. 1A), tin post finish (vs. tin-lead), and ROHS3 compliance. PCB footprints and mating connector compatibility are preserved.

Q: What is the difference between latch lock/eject hooks and push-pull fastening?

A: Latch lock/eject hooks provide positive mechanical engagement with audible/tactile feedback and require deliberate unlatching for disconnection. Push-pull fastening uses a sliding collar mechanism for connection and disconnection. Both fastening types are mechanically compatible with standard 2.54mm pitch receptacles, but the connector design differs. Select based on application requirements for connection security and ease of use.

Q: Are TE Connectivity AMP-Latch and Amphenol ICC Quickie™ headers mechanically compatible with 3M 3000 series receptacles?

A: Yes. All substitute parts maintain the 0.100" (2.54mm) mating pitch, 20-position configuration, and shrouded 4-wall construction. Mechanical compatibility with standard 2.54mm pitch receptacles is preserved across manufacturers. Verify contact finish and post length specifications for specific application requirements.

Q: What is the significance of contact post finish (tin vs. tin-lead)?

A: Contact post finish affects solderability and long-term reliability. Tin-lead finishes (older standard) provide established soldering characteristics but are restricted under RoHS regulations. Tin finishes (RoHS-compliant) require compatible solder alloys (lead-free) and may require process optimization. Both finishes are functionally equivalent for electrical performance in standard applications.

Q: Why do some substitute parts specify operating temperature range of -65°C to 105°C instead of -55°C to 105°C?

A: TE Connectivity AMP-Latch series parts specify -65°C minimum operating temperature, providing extended low-temperature performance compared to the 3M 3000 series (-55°C minimum). This represents an enhanced specification and does not restrict compatibility. Applications requiring only -55°C to 105°C operation are fully supported.

Q: What packaging options are available for these substitute parts?

A: Packaging varies by part number: bulk (RB suffix), tray (standard), and tape/reel formats. Bulk packaging (N3428-6303RB, N3428-6002RB) is suitable for prototype and low-volume applications. Tray and tape/reel packaging (D3428-6002-AR, TE Connectivity, Amphenol ICC parts) are optimized for production assembly. Select packaging based on procurement volume and assembly process requirements.

Q: Are there current rating differences between substitute parts?

A: Yes. The original 3428-6303 and most TE Connectivity AMP-Latch parts are rated at 1.0A per contact. The 3M N3428-6303RB, N3428-6002RB, and D3428-6002-AR variants provide improved 1.75A rating. Amphenol ICC Quickie™ series parts do not specify current rating in available documentation. Select based on application current requirements and thermal management considerations.

Q: Which substitute part offers the best combination of compliance, availability, and performance?

A: N3428-6303RB provides the optimal balance: direct mechanical compatibility with the original 3428-6303, ROHS3 compliance, improved 1.75A current rating, active product status, and substantial inventory availability (1867 pcs). For applications requiring push-pull fastening, D3428-6002-AR offers equivalent compliance and performance with tray packaging for production environments.

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