3M 3428-6203 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The 3M 3428-6203 is a vertical rectangular connector header with 20 positions at 2.54mm pitch, designed for through-hole mounting with solder termination. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The connector features shrouded 4-wall construction with latch lock/eject hook fastening, suitable for board-to-board or cable interconnections in industrial and commercial electronics.

Key Parameters

Parameter	Value
Manufacturer Part Number	3428-6203
Manufacturer	3M
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	Latch Lock/Eject Hooks, Short
Operating Temperature Range	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
Current Rating	1A
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the 3428-6203 is determined by the following critical parameters that must remain consistent:

Connector type: Header with male pins
Number of positions: 20
Number of rows: 2
Pitch spacing: 0.100" (2.54mm) mating and row spacing
Mounting method: Through hole with solder termination
Shrouding configuration: Shrouded 4-wall construction
Style: Board-to-board or cable interconnection capability
Insulation material flammability: UL94 V-0 rating

Substitute parts are grouped into two categories based on fastening type and compliance status:

Category 1: Push-Pull Fastening with Active Status Parts D3428-6002-AR, N3428-6002RB, and HARTING 09185205924 feature push-pull fastening mechanisms and active product status. These represent modern alternatives with improved compliance profiles.

Category 2: Latch Lock/Eject Hook Fastening with Active Status HARTING parts 09185205912, 09185205914, 09185206912, 09185207912, 09195205904, and 09195206904 maintain the original latch lock/eject hook fastening design while offering active product status and enhanced compliance certifications.

Parameter Comparison

Parameter	3428-6203 (Main)	D3428-6002-AR	N3428-6002RB	09185205912	09185205914	09185205924	09185206912	09185207912	09195205904	09195206904
Manufacturer	3M	3M	3M	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING
Number of Positions	20	20	20	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)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2	2	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)	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	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	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Latch Lock/Eject Hooks, Short	Push-Pull	Push-Pull	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short	Push-Pull	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Long
Contact Material	Copper Alloy	Brass	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Not specified
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Insulation Material	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PCT, Glass Filled	PCT, Glass Filled
Operating Temperature Range	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Current Rating	1A	1.75A	1.75A	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	Not specified	Not specified	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

For RoHS Compliance Requirements: Select D3428-6002-AR or N3428-6002RB for 3M-sourced alternatives with active product status and RoHS compliance. Both maintain the 20-position, 2.54mm pitch configuration with through-hole solder termination. D3428-6002-AR offers RoHS Compliant status, while N3428-6002RB provides ROHS3 Compliant certification with REACH Unaffected designation.

For Extended Temperature Range Applications: HARTING SEK series connectors (09185205912, 09185205914, 09185206912, 09185207912, 09195205904, 09195206904) support -55°C to 125°C operating range, exceeding the original 3428-6203 specification of -55°C to 105°C. These parts maintain active product status and ROHS3 compliance with REACH Unaffected status.

For Fastening Mechanism Compatibility: Latch lock/eject hook fastening is preserved in HARTING parts 09185205912, 09185205914, 09185206912, 09185207912, 09195205904, and 09195206904. Push-pull fastening alternatives are available in D3428-6002-AR, N3428-6002RB, and HARTING 09185205924 for applications requiring different engagement characteristics.

For Current Capacity: D3428-6002-AR and N3428-6002RB provide 1.75A current rating, exceeding the original 1A specification. HARTING parts do not specify current ratings in the provided data.

For Packaging Considerations: D3428-6002-AR is supplied in tray packaging. N3428-6002RB and all HARTING alternatives are supplied in bulk packaging. Select based on production volume and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can HARTING SEK series connectors directly replace the 3M 3428-6203? A: HARTING parts maintain the critical electrical and mechanical parameters: 20 positions, 2.54mm pitch, 2-row configuration, through-hole mounting, shrouded 4-wall construction, and UL94 V-0 flammability rating. Fastening type varies between latch lock/eject hooks and push-pull designs. Verify fastening compatibility with mating connectors before substitution.

Q: What is the primary reason to substitute the 3428-6203? A: The 3428-6203 is classified as obsolete. Active alternatives ensure long-term supply availability and support for ongoing production. Additionally, substitute parts offer improved compliance certifications including RoHS and REACH compliance.

Q: Are there differences in contact materials between the main part and substitutes? A: The main part uses copper alloy contacts. D3428-6002-AR uses brass contacts. HARTING and N3428-6002RB alternatives use copper alloy. Both materials are acceptable for the specified 2.54mm pitch and current ratings, with no functional impact on connector performance.

Q: Do substitute parts support the same operating temperature range? A: The original 3428-6203 operates from -55°C to 105°C. 3M alternatives (D3428-6002-AR, N3428-6002RB) maintain this range. HARTING alternatives extend the range to -55°C to 125°C, providing additional thermal margin for demanding applications.

Q: What packaging options are available? A: D3428-6002-AR is supplied in tray packaging. N3428-6002RB and all HARTING alternatives are supplied in bulk packaging. Tray packaging is suitable for automated assembly processes, while bulk packaging is appropriate for manual assembly or lower-volume applications.

Q: Are all substitute parts RoHS compliant? A: D3428-6002-AR is RoHS Compliant. N3428-6002RB and all HARTING alternatives are ROHS3 Compliant. The original 3428-6203 is RoHS non-compliant. Verify compliance requirements for your application before selection.

Q: What is the difference between latch lock/eject hooks and push-pull fastening? A: Latch lock/eject hook fastening uses mechanical hooks for secure engagement and requires deliberate unlatching for disconnection. Push-pull fastening uses a sliding mechanism for engagement and disengagement. Select based on mating connector type and application requirements for secure or frequent disconnection scenarios.

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