3M 3428-6002UG Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3428-6002UG is a shrouded vertical rectangular connector header with 20 positions at 2.54mm pitch, designed for through-hole board-to-board or cable applications. This part operates across -55°C to 105°C with a 1A current rating and features gold-plated mating contacts with tin-lead post finish. The 3428-6002UG is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility while offering improved availability and compliance status.

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)
Mounting Type	Through Hole
Shrouding	Shrouded - 4 Wall
Fastening Type	Push-Pull
Operating Temperature Range	-55°C to 105°C
Current Rating	1A
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 3428-6002UG is determined by strict equivalence across the following critical parameters: 20-position configuration, 2.54mm mating pitch, 2-row layout with 0.100" row spacing, through-hole mounting, shrouded 4-wall design, push-pull fastening, and male pin contact type. All substitute parts maintain these core mechanical and electrical specifications.

Substitute parts are grouped into two categories based on fastening mechanism and contact geometry:

Category A - Push-Pull Fastening with Square or Circular Contacts:

3M D3428-6002-AR (active, RoHS compliant, upgraded series)
3M N3428-6002RB (active, ROHS3 compliant, bulk packaging)
CW Industries CWN-360-20-0000 (active, ROHS3 compliant, circular contacts)
CW Industries CWN-360-20-0021 (active, ROHS3 compliant, circular contacts)

Category B - Alternative Fastening Mechanisms:

CW Industries CWN-350-20-0021 (push-pull, circular contacts)
CW Industries CWN-351-20-0021 (latch lock/eject hooks short)
CW Industries CWN-352-20-0021 (latch lock/eject hooks long)
CW Industries CWN-462-20-0000 (latch lock/eject hooks long)

All listed substitutes maintain the 20-position, 2.54mm pitch, through-hole, shrouded configuration required for mechanical and electrical compatibility.

Parameter Comparison

Parameter	3428-6002UG (Main)	D3428-6002-AR	N3428-6002RB	CWN-350-20-0021	CWN-360-20-0000	CWN-360-20-0021	CWN-462-20-0000
Manufacturer	3M	3M	3M	CW Industries	CW Industries	CW Industries	CW Industries
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Number of Positions	20	20	20	20	20	20	20
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2	2	2	2	2	2
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Contact Shape	Square	Square	Square	Circular	Circular	Circular	Circular
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Latch Lock/Eject Hooks, Long
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)
Contact Length - Post	0.112" (2.84mm)	0.112" (2.84mm)	0.112" (2.84mm)	0.090" (2.29mm)	0.155" (3.94mm)	0.155" (3.94mm)	0.155" (3.94mm)
Insulation Height	0.680" (17.27mm)	0.680" (17.27mm)	0.680" (17.27mm)	0.681" (17.30mm)	0.681" (17.30mm)	0.681" (17.30mm)	0.681" (17.30mm)
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish - Post	Tin-Lead	Tin	Tin	Nickel	Nickel	Nickel	Nickel
Contact Material	Copper Alloy	Brass	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Operating Temperature Range	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Current Rating	1A	1.75A	1.75A	1A	1A	1A	1A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	Non-compliant	Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The 3M D3428-6002-AR and 3M N3428-6002RB are the preferred direct substitutes. Both maintain the 3M manufacturer lineage, preserve the 20-position 2.54mm pitch configuration, and offer active product status with improved compliance. D3428-6002-AR is RoHS compliant with upgraded D3000 series designation and higher current rating (1.75A). N3428-6002RB is ROHS3 compliant with bulk packaging and maintains the original 3000 series base product number. Both support the original operating temperature range and feature square contact geometry matching the main part.

Secondary Substitutes (Functional Equivalence with Variations):

CW Industries CWN-360-20-0000 and CWN-360-20-0021 provide functional equivalence with extended operating temperature range (-55°C to 125°C) and active product status. These parts feature circular contact geometry and phosphor bronze material, differing from the main part's square copper alloy contacts. Contact post length extends to 0.155" (3.94mm) compared to the main part's 0.112" (2.84mm), requiring PCB design verification for clearance compatibility.

Alternative Fastening Options:

CWN-350-20-0021, CWN-351-20-0021, CWN-352-20-0021, and CWN-462-20-0000 offer mechanical substitution with alternative fastening mechanisms (latch lock/eject hooks) in place of push-pull fastening. These parts are suitable only when connector mating interface design accommodates the different fastening approach. All CW Industries alternatives provide ROHS3 compliance and extended temperature rating.

Compliance Considerations:

The original 3428-6002UG is RoHS non-compliant. All listed substitutes achieve RoHS or ROHS3 compliance, supporting regulatory requirements for new designs and procurement. The transition from tin-lead post finish (main part) to tin or nickel finish (substitutes) aligns with RoHS directives and improves solderability with lead-free assembly processes.

Frequently Asked Questions (FAQ)

Q: Can CWN-360-20-0021 directly replace 3428-6002UG in existing designs?

A: CWN-360-20-0021 maintains mechanical compatibility across pitch, position count, row spacing, mounting type, and shrouding. However, three design considerations apply: (1) contact post length differs (0.155" vs. 0.112"), requiring PCB hole depth verification; (2) contact geometry is circular rather than square; (3) contact material is phosphor bronze with nickel finish instead of copper alloy with tin-lead finish. Electrical performance remains equivalent at 1A current rating. Mechanical fit must be confirmed for the specific PCB design.

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

A: Both are active 3M substitutes with identical mechanical specifications and 20-position 2.54mm pitch configuration. D3428-6002-AR belongs to the upgraded D3000 series with RoHS compliance, brass contact material, and 1.75A current rating. N3428-6002RB remains in the original 3000 series with ROHS3 compliance, copper alloy contact material, and 1.75A current rating. Packaging differs: D3428-6002-AR ships in trays; N3428-6002RB ships in bulk. Both support -55°C to 105°C operation.

Q: Are CWN parts suitable for applications requiring push-pull fastening?

A: CWN-360-20-0000 and CWN-360-20-0021 feature push-pull fastening identical to the main part. CWN-350-20-0021, CWN-351-20-0021, CWN-352-20-0021, and CWN-462-20-0000 employ latch lock/eject hook fastening and are suitable only when the mating connector interface is designed for this mechanism. Fastening type must be verified against the specific application's connector receptacle design.

Q: Does the extended operating temperature of CW Industries parts affect compatibility?

A: CW Industries substitutes operate across -55°C to 125°C, exceeding the main part's -55°C to 105°C range. This extended capability does not compromise compatibility with designs rated for the original temperature range. Applications requiring operation above 105°C benefit from the expanded thermal envelope. No design modification is required to accommodate the higher temperature rating.

Q: What packaging options are available for volume procurement?

A: D3428-6002-AR is supplied in trays. N3428-6002RB is supplied in bulk. CWN-360-20-0000, CWN-360-20-0021, CWN-350-20-0021, and CWN-462-20-0000 are supplied in bulk. CWN-351-20-0021 and CWN-352-20-0021 packaging is not specified in available data. Packaging selection should align with assembly process requirements and inventory management protocols.

Q: How do contact post length variations affect PCB design?

A: The main part specifies 0.112" (2.84mm) post length. CWN-360-20-0000 and CWN-360-20-0021 extend to 0.155" (3.94mm), a 0.043" (1.10mm) increase. This difference requires verification that PCB through-hole depth and solder fillet clearance accommodate the longer post. D3428-6002-AR and N3428-6002RB maintain the original 0.112" post length, eliminating this consideration. CWN-350-20-0021 reduces post length to 0.090" (2.29mm), requiring confirmation that solder joint formation remains adequate.

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