3M 3429-5203 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3429-5203 is a through-hole, right-angle rectangular connector header with 26 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This shrouded, 4-wall header connector is designed for board-to-board or cable applications with solder termination and latch lock/eject hook fastening. The part is currently active in production with 795 units in stock. Equivalent and substitute parts are necessary when the original part number becomes obsolete, when alternative packaging formats are required, or when compliance certifications differ between manufacturing revisions.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	26
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 - 4 Wall
Termination	Solder
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0
Insulation Material	Polycyclohexylenedimethylene Terephthalate (PCT), Polyester, Glass Filled

Substitute Part Grouping Explanation

Substitution eligibility for the 3M 3429-5203 is determined by the following critical parameters:

Connector Type, Contact Type, and Position Count: All substitutes must be headers with male pins in 26-position configuration
Pitch and Row Spacing: All substitutes must maintain 0.100" (2.54mm) mating pitch and row spacing
Mounting and Shrouding: All substitutes must be through-hole, right-angle mounted with shrouded 4-wall design
Termination and Fastening: All substitutes must use solder termination; fastening type may vary (latch lock/eject hooks or push-pull)
Operating Temperature and Current Rating: All substitutes must support -55°C ~ 105°C range and 1.75A current rating
Insulation Material and Flammability: All substitutes must use PCT/Polyester glass-filled insulation with UL94 V-0 rating

The three substitute parts listed (3429-5002, D3429-5002-AR, N3429-5002RB) meet these core electrical and mechanical requirements. Variations exist in contact post length, contact finish specifications, base product series designation, packaging format, and RoHS compliance status.

Parameter Comparison

Parameter	3429-5203 (Main)	3429-5002	D3429-5002-AR	N3429-5002RB
Manufacturer	3M	3M	3M	3M
Series	3000	3000	D3000	3000
Product Status	Active	Obsolete	Active	Active
Connector Type	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	26	26	26	26
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)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder	Solder	Solder
Fastening Type	Latch Lock/Eject Hooks, Short	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	0.155" (3.94mm)	0.112" (2.84mm)	0.112" (2.84mm)	0.112" (2.84mm)
Insulation Height	0.340" (8.64mm)	0.340" (8.64mm)	0.340" (8.64mm)	0.340" (8.64mm)
Contact Shape	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Gold
Contact Finish Thickness - Mating	30.0µin (0.76µm)	30.0µin (0.76µm)	10.0µin (0.25µm)	30.0µin (0.76µm)
Contact Finish - Post	Tin-Lead	Tin-Lead	Tin	Tin
Contact Material	Copper Alloy	Copper Alloy	Brass	Copper Alloy
Insulation Material	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	Black	Black	Black	Black
Current Rating	1.75A	1.75A	1.75A	1.75A
RoHS Status	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging	Not specified	Bulk	Tray	Bulk
Inventory Status	795 Pcs New Original In Stock	1434 Pcs New Original In Stock	1197 Pcs New Original In Stock	2290 Pcs New Original In Stock

Engineering Selection Recommendations

For Active Production Designs: N3429-5002RB is the preferred substitute. This part maintains active product status, achieves ROHS3 compliance, and provides the highest inventory availability (2290 units). The fastening mechanism differs from the original (push-pull versus latch lock/eject hooks), but electrical and mechanical compatibility is maintained.

For RoHS3 Compliance Requirements: Both D3429-5002-AR and N3429-5002RB meet ROHS3 compliance. D3429-5002-AR is designated as board-to-cable/wire style and uses brass contact material with reduced mating finish thickness (10.0µin). N3429-5002RB maintains copper alloy contacts with standard gold finish thickness (30.0µin).

For Existing Designs Using 3429-5203: The 3429-5002 remains functionally equivalent but carries obsolete product status. This part should be used only when existing inventory must be consumed or when RoHS compliance is not a design requirement.

Contact Post Length Consideration: The main part 3429-5203 features a longer contact post (0.155" / 3.94mm) compared to all three substitutes (0.112" / 2.84mm). PCB design layouts must accommodate this dimensional difference during component placement and routing.

Frequently Asked Questions (FAQ)

Q: Can 3429-5002 be used as a direct replacement for 3429-5203?

A: Electrical and mechanical compatibility is maintained. However, 3429-5002 carries obsolete product status. The fastening mechanism differs (push-pull versus latch lock/eject hooks), and contact post length is shorter (0.112" versus 0.155"). New designs should use N3429-5002RB or D3429-5002-AR instead.

Q: What is the difference between N3429-5002RB and D3429-5002-AR?

A: Both parts are active and ROHS3 compliant. N3429-5002RB uses copper alloy contacts with standard gold finish thickness (30.0µin) and is packaged in bulk. D3429-5002-AR uses brass contacts with reduced gold finish thickness (10.0µin), is designated for board-to-cable/wire applications, and is packaged in trays. Contact material and finish specifications differ; select based on application requirements.

Q: Does the shorter contact post length of substitute parts affect PCB design?

A: Yes. The substitute parts have contact posts of 0.112" (2.84mm) compared to the original 0.155" (3.94mm). PCB hole depth and component placement must be adjusted accordingly. Verify PCB stackup and solder joint formation with the reduced post length.

Q: Are all substitute parts RoHS compliant?

A: No. The 3429-5002 is RoHS non-compliant. Both D3429-5002-AR and N3429-5002RB are ROHS3 compliant. Select based on regulatory requirements for your application.

Q: What packaging options are available?

A: 3429-5002 and N3429-5002RB are supplied in bulk packaging. D3429-5002-AR is supplied in tray packaging. Select based on assembly line requirements and inventory management practices.

Q: Can fastening type differences (latch lock/eject hooks versus push-pull) affect mating reliability?

A: Both fastening mechanisms provide secure mating. Latch lock/eject hooks offer positive engagement with manual release. Push-pull fastening provides tool-free connection and disconnection. Select based on application requirements for mating frequency and user interface preferences.

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