3M 3428-1202 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3428-1202 is a through-hole, right-angle rectangular connector header with 20 positions at 2.54mm pitch, designed for board-to-board or cable interconnection applications. This part operates across the -55°C to 105°C temperature range with a 1.75A current rating per contact and UL94 V-0 flammability compliance.

The 3428-1202 is classified as obsolete. Equivalent substitute parts are available from 3M's active product lines and alternative manufacturers, providing direct functional replacement with enhanced specifications or improved availability.

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, Right Angle
Shrouding	Shrouded
Contact Length - Mating	0.240" (6.10mm)
Contact Length - Post	0.112" (2.84mm)
Current Rating	1.75A
Operating Temperature	-55°C to 105°C
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility for the 3428-1202 is determined by the following critical parameters:

Connector configuration: 20-position, 2-row header at 2.54mm pitch
Mounting style: Through-hole, right-angle orientation
Contact specifications: Male pins with 0.240" mating length and 0.112" post length
Electrical performance: 1.75A current rating minimum
Environmental compliance: UL94 V-0 flammability rating and -55°C to 105°C operating range
Termination method: Solder attachment

Three substitute parts meet these criteria with variations in shrouding design, contact material composition, and product status:

D3428-5002-AR (3M, Active): Enhanced 4-wall shrouding, ROHS3 compliant
N3428-5002RB (3M, Active): 4-wall shrouding, ROHS3 compliant, bulk packaging
CWN-301-20-0021 (CW Industries, Active): Alternative manufacturer option with extended temperature range

Parameter Comparison

Parameter	3428-1202	D3428-5002-AR	N3428-5002RB	CWN-301-20-0021
Manufacturer	3M	3M	3M	CW Industries
Product Status	Obsolete	Active	Active	Active
Number of Positions	20	20	20	20
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Shrouding	Shrouded - 3 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
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)
Current Rating (Amps)	1.75A	1.75A	1.75A	1A
Operating Temperature	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

D3428-5002-AR and N3428-5002RB are direct 3M product line successors to the 3428-1202. Both parts maintain identical electrical and mechanical specifications while offering ROHS3 compliance and improved shrouding design (4-wall vs. 3-wall). D3428-5002-AR is packaged in trays; N3428-5002RB is available in bulk. Selection between these two depends on packaging and inventory requirements.

CWN-301-20-0021 from CW Industries provides an alternative manufacturer option with active product status and ROHS3 compliance. This part features an extended operating temperature range (-55°C to 125°C) and circular contact geometry. The contact post length is reduced to 0.090" (2.29mm) and current rating is 1A, which represents a design variation that may require PCB layout verification for compatibility.

For applications requiring strict electrical equivalence and established supply chain continuity, D3428-5002-AR or N3428-5002RB are preferred. For applications with higher temperature requirements or alternative sourcing strategies, CWN-301-20-0021 is suitable with design review.

Frequently Asked Questions (FAQ)

Q: Can D3428-5002-AR directly replace 3428-1202 on existing PCBs?

A: Yes. D3428-5002-AR maintains identical mating pitch (2.54mm), contact length (0.240" mating, 0.112" post), and mounting footprint. The 4-wall shrouding provides enhanced mechanical protection compared to the original 3-wall design.

Q: What is the difference between D3428-5002-AR and N3428-5002RB?

A: Both parts are electrically and mechanically identical. The primary difference is packaging: D3428-5002-AR ships in trays, while N3428-5002RB is supplied in bulk. Series designation differs (D3000 vs. 3000), but functional specifications are equivalent.

Q: Is CWN-301-20-0021 compatible with 3428-1202 applications?

A: CWN-301-20-0021 shares the same 20-position, 2.54mm pitch configuration and through-hole right-angle mounting. However, the contact post length is 0.090" versus 0.112", and current rating is 1A versus 1.75A. PCB layout and circuit current requirements must be evaluated before substitution.

Q: Why does CWN-301-20-0021 have a lower current rating?

A: CWN-301-20-0021 is specified at 1A per contact, compared to 1.75A for the 3M parts. This reflects design differences in contact material (phosphor bronze vs. copper alloy) and contact geometry (circular vs. square). Applications exceeding 1A per contact require the 3M alternatives.

Q: Are all substitute parts RoHS compliant?

A: D3428-5002-AR, N3428-5002RB, and CWN-301-20-0021 are all ROHS3 compliant. The original 3428-1202 is RoHS non-compliant. For applications subject to RoHS requirements, any of the three substitutes are acceptable.

Q: What is the temperature operating range difference?

A: The 3428-1202, D3428-5002-AR, and N3428-5002RB operate from -55°C to 105°C. CWN-301-20-0021 extends the upper limit to 125°C, providing 20°C additional thermal margin for high-temperature applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message