3M 3428-2002 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3428-2002 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 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)
Mounting Type	Through Hole
Termination	Solder
Shrouding	Shrouded - 3 Wall
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1A
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 3428-2002 is determined by the following critical parameters that must remain consistent:

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)
Fastening type (Push-Pull)
Contact shape and mating contact length
Operating temperature range (-55°C ~ 105°C minimum)
Material flammability rating (UL94 V-0)

Variations permitted in substitutes include shrouding configuration (3-wall to 4-wall), contact material composition, contact finish specifications, post finish type, current rating increases, and RoHS compliance status. Style variations (Board to Board or Cable vs. Board to Cable/Wire) are acceptable where mechanical and electrical compatibility is maintained.

Parameter Comparison

Parameter	3428-2002 (Main)	D3428-6002-AR	N3428-6002RB	CWN-350-20-0021
Manufacturer	3M	3M	3M	CW Industries
Connector Type	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	20	20	20	20
Number of Rows	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Shrouding	Shrouded - 3 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	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)
Overall Contact Length	0.652" (16.56mm)	0.652" (16.56mm)	0.652" (16.56mm)	Not specified
Insulation Height	0.680" (17.27mm)	0.680" (17.27mm)	0.680" (17.27mm)	0.681" (17.30mm)
Contact Shape	Square	Square	Square	Circular
Contact Finish - Mating	Gold	Gold	Gold	Gold
Contact Finish - Post	Tin-Lead	Tin	Tin	Nickel
Contact Material	Copper Alloy	Brass	Copper Alloy	Phosphor Bronze
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C
Current Rating (Amps)	1A	1.75A	1.75A	1A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active
Inventory Status	722 Pcs New Original In Stock	1101 Pcs New Original In Stock	1400 Pcs New Original In Stock	1096 Pcs New Original In Stock

Engineering Selection Recommendations

All three substitute parts maintain the core electrical and mechanical compatibility with the 3428-2002 across the critical parameters of connector type, contact configuration, pitch, row spacing, mounting method, and termination. The following factors apply to selection:

D3428-6002-AR (3M): This part is the manufacturer-recommended substitute from 3M. It provides improved current rating (1.75A vs. 1A), enhanced shrouding (4-wall vs. 3-wall), and RoHS compliance. The contact material changes from copper alloy to brass, and post finish changes from tin-lead to tin. Operating temperature range remains -55°C ~ 105°C. This option maintains 3M ecosystem consistency.

N3428-6002RB (3M): This 3M part offers the same electrical and mechanical compatibility as D3428-6002-AR with identical current rating (1.75A) and shrouding (4-wall). It retains copper alloy contact material and maintains the original tin post finish specification. ROHS3 compliance is confirmed. Bulk packaging is available.

CWN-350-20-0021 (CW Industries): This alternative from CW Industries provides extended operating temperature range (-55°C ~ 125°C) and maintains the 1A current rating. Contact shape is circular rather than square, and post contact length is shorter (0.090" vs. 0.112"). Contact material is phosphor bronze with nickel post finish. ROHS3 compliance is confirmed.

Selection should prioritize active product status and RoHS compliance requirements for new designs. The 3M D3428-6002-AR and N3428-6002RB options provide direct functional equivalence with improved specifications. The CW Industries CWN-350-20-0021 is suitable where extended temperature operation is required, with consideration for contact geometry differences.

Frequently Asked Questions (FAQ)

Q: Can the 3428-2002 be directly replaced with D3428-6002-AR?

A: Yes. Both parts share identical connector type, contact configuration, pitch, row spacing, mounting type, and termination method. The D3428-6002-AR provides enhanced shrouding (4-wall), improved current rating (1.75A), and RoHS compliance. The contact material and post finish differ but maintain electrical compatibility.

Q: What is the difference between the 3M substitute options (D3428-6002-AR and N3428-6002RB)?

A: Both 3M options provide identical electrical and mechanical compatibility with 1.75A current rating and 4-wall shrouding. D3428-6002-AR uses brass contact material with tin post finish and is supplied in trays. N3428-6002RB uses copper alloy contact material with tin post finish and is supplied in bulk. Both are RoHS compliant and active products.

Q: Is the CWN-350-20-0021 from CW Industries compatible with the 3428-2002?

A: The CWN-350-20-0021 maintains core compatibility in connector type, contact configuration, pitch, row spacing, mounting, and termination. However, it features circular contact shape (vs. square), shorter post contact length (0.090" vs. 0.112"), and different contact material (phosphor bronze vs. copper alloy). It offers extended operating temperature (-55°C ~ 125°C) and is RoHS3 compliant.

Q: What are the packaging differences among the substitute parts?

A: D3428-6002-AR is supplied in trays. N3428-6002RB is supplied in bulk. CWN-350-20-0021 is supplied in bulk. Packaging selection depends on procurement and assembly requirements.

Q: Are all substitute parts RoHS compliant?

A: The original 3428-2002 is RoHS non-compliant. All three substitute parts (D3428-6002-AR, N3428-6002RB, and CWN-350-20-0021) are RoHS compliant or ROHS3 compliant, making them suitable for applications with RoHS requirements.

Q: What is the current rating difference, and does it affect compatibility?

A: The 3428-2002 is rated at 1A. D3428-6002-AR and N3428-6002RB are rated at 1.75A, providing higher current capacity. CWN-350-20-0021 maintains 1A rating. Higher current ratings in substitutes do not affect compatibility with designs using the original 1A specification.

Q: Can the contact geometry differences (square vs. circular) affect mating performance?

A: Contact geometry differences exist between the 3M options (square) and the CW Industries option (circular). These differences may affect mating force characteristics and contact retention. Mechanical compatibility should be verified for the specific mating connector used in the application.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message