3M 3429-1003 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3429-1003 is a through-hole, right-angle rectangular connector header with 26 positions at 2.54mm pitch. This connector is classified as obsolete, which necessitates identification of functionally equivalent substitute parts for ongoing design support and procurement. The part features shrouded 3-wall construction, male pin contacts with gold mating finish, and operates across the -55°C to 105°C temperature range. Current inventory of 696 pieces is available as new original stock.

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 - 3 Wall
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Operating Temperature	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitute parts for the 3429-1003 are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

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
Termination: Solder
Shrouding: Shrouded configuration
Fastening type: Push-Pull or Latch Lock/Eject Hooks
Material flammability rating: UL94 V-0
Operating temperature range: -55°C ~ 105°C

Acceptable Variations:

Shrouding: 3-wall or 4-wall configurations
Contact finish thickness - mating: 10.0µin to 30.0µin
Contact finish - post: Tin, Tin-Lead, or unspecified
Contact material: Copper Alloy, Brass, or Phosphor Bronze Alloy
Insulation material: PCT/Polyester/Glass Filled or Polyester/Glass Filled
Packaging: Bulk or Tray
Product status: Active or Obsolete
RoHS compliance: Compliant or non-compliant

Substitutes are organized into two primary groups: 3M series parts (including active and obsolete variants) and Amphenol ICC (FCI) Quickie™ series parts.

Parameter Comparison

Part Number	Manufacturer	Positions	Pitch (mm)	Rows	Shrouding	Fastening Type	Contact Shape	Contact Finish - Mating	Operating Temp (°C)	Product Status	RoHS Status
3429-1003	3M	26	2.54	2	Shrouded - 3 Wall	Push-Pull	Square	Gold	-55 ~ 105	Obsolete	Non-compliant
3429-5002	3M	26	2.54	2	Shrouded - 4 Wall	Push-Pull	Square	Gold	-55 ~ 105	Obsolete	Non-compliant
D3429-5002-AR	3M	26	2.54	2	Shrouded - 4 Wall	Push-Pull	Square	Gold	-55 ~ 105	Active	ROHS3 Compliant
N3429-5002RB	3M	26	2.54	2	Shrouded - 4 Wall	Push-Pull	Square	Gold	-55 ~ 105	Active	ROHS3 Compliant
65823-025LF	Amphenol ICC (FCI)	26	2.54	2	Shrouded - 4 Wall	Push-Pull	Circular	Gold or Gold, GXT™	Not specified	Active	RoHS Compliant
65823-027LF	Amphenol ICC (FCI)	26	2.54	2	Shrouded - 4 Wall	Push-Pull	Circular	Gold or Gold, GXT™	Not specified	Active	RoHS Compliant
65823-073	Amphenol ICC (FCI)	26	2.54	2	Shrouded - 4 Wall	Latch Lock/Eject Hooks	Circular	Gold or Gold, GXT™	Not specified	Active	Non-compliant
65823-073LF	Amphenol ICC (FCI)	26	2.54	2	Shrouded - 4 Wall	Latch Lock/Eject Hooks	Circular	Gold or Gold, GXT™	Not specified	Active	RoHS Compliant
65823-169	Amphenol ICC (FCI)	26	2.54	2	Shrouded - 4 Wall	Latch Lock/Eject Hooks, Short	Circular	Gold or Gold, GXT™	Not specified	Active	Non-compliant
65823-239LF	Amphenol ICC (FCI)	26	2.54	2	Shrouded - 4 Wall	Latch Lock/Eject Hooks	Circular	Gold or Gold, GXT™	Not specified	Active	RoHS Compliant
65823-275	Amphenol ICC (FCI)	26	2.54	2	Shrouded - 4 Wall	Push-Pull	Circular	Gold or Gold, GXT™	Not specified	Active	Non-compliant

Engineering Selection Recommendations

Tier 1 - Direct 3M Series Substitutes (Recommended for Legacy System Continuity):

The 3M N3429-5002RB and D3429-5002-AR represent the primary substitutes for the obsolete 3429-1003. Both parts maintain identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. The N3429-5002RB is available in bulk packaging with 2290 pieces in stock, while D3429-5002-AR is supplied in tray packaging with 1197 pieces available. The transition from 3-wall to 4-wall shrouding provides enhanced mechanical protection without affecting electrical performance.

Tier 2 - 3M Obsolete Series (Interim Solution):

The 3429-5002 provides functional equivalence with identical electrical characteristics but remains classified as obsolete. This part is suitable only for applications where active product status is not a procurement requirement.

Tier 3 - Amphenol ICC (FCI) Quickie™ Series (Cross-Manufacturer Alternative):

The Amphenol ICC (FCI) Quickie™ series parts (65823-025LF, 65823-027LF, 65823-073LF, 65823-239LF, 65823-275) provide electrical and mechanical compatibility with the 3429-1003. These parts feature circular contact geometry versus the square contacts of the 3M series, circular contact shape does not affect mating compatibility with standard 2.54mm pitch receptacles. All Quickie™ series parts maintain the required 26-position, 2-row configuration with 2.54mm pitch and through-hole right-angle mounting.

The 65823-025LF, 65823-239LF, and 65823-073LF variants offer RoHS compliance. The 65823-025LF and 65823-275 employ push-pull fastening identical to the 3429-1003, while 65823-073, 65823-073LF, 65823-169, and 65823-239LF utilize latch lock/eject hook fastening, which provides enhanced connection security.

Compliance Considerations:

For applications requiring RoHS3 compliance, select N3429-5002RB or D3429-5002-AR from the 3M series, or 65823-025LF, 65823-027LF, 65823-073LF, or 65823-239LF from the Amphenol ICC (FCI) series.

For applications with no RoHS requirement, all listed substitutes remain functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can the 3429-1003 be directly replaced with N3429-5002RB or D3429-5002-AR?

A: Yes. Both parts maintain identical electrical specifications, operating temperature range, current rating, and mating pitch. The transition from 3-wall to 4-wall shrouding provides improved mechanical protection. Both are active products with ROHS3 compliance, making them the preferred substitutes for new designs and legacy system updates.

Q: What is the difference between 3M square contact geometry and Amphenol ICC (FCI) circular contact geometry?

A: Contact geometry does not affect mating compatibility. Both square and circular contacts mate with standard 0.100" (2.54mm) pitch receptacles. The choice between geometries depends on connector family standardization within the application.

Q: Are the Amphenol ICC (FCI) Quickie™ series parts electrically equivalent to the 3429-1003?

A: Yes. All Quickie™ series parts listed maintain the required 26-position, 2-row configuration with 0.100" (2.54mm) pitch, through-hole right-angle mounting, and UL94 V-0 flammability rating. Electrical performance is equivalent across all listed substitutes.

Q: What is the difference between push-pull and latch lock/eject hook fastening?

A: Push-pull fastening (3429-1003, 3429-5002, N3429-5002RB, D3429-5002-AR, 65823-025LF, 65823-027LF, 65823-275) provides standard connection and disconnection. Latch lock/eject hook fastening (65823-073, 65823-073LF, 65823-169, 65823-239LF) provides enhanced mechanical retention and controlled ejection. Both fastening types are functionally compatible with standard mating receptacles.

Q: Which substitute offers the best availability?

A: N3429-5002RB provides the highest inventory with 2290 pieces in stock. D3429-5002-AR offers 1197 pieces. Among Amphenol ICC (FCI) parts, 65823-025LF provides 1100 pieces, and 65823-169 provides 1028 pieces.

Q: Are there packaging differences between substitutes?

A: Yes. 3M parts are available in bulk or tray packaging. Amphenol ICC (FCI) Quickie™ series parts are supplied in bulk or tray configurations. Packaging selection does not affect electrical or mechanical performance.

Q: Can the 3429-1003 be used interchangeably with all listed substitutes in existing designs?

A: Yes, provided the application does not have specific fastening type requirements. If the design requires push-pull fastening, select from 3429-5002, N3429-5002RB, D3429-5002-AR, 65823-025LF, 65823-027LF, or 65823-275. If latch lock/eject hook fastening is acceptable, 65823-073, 65823-073LF, 65823-169, and 65823-239LF are also suitable.

Q: What RoHS compliance options are available?

A: ROHS3-compliant options include N3429-5002RB and D3429-5002-AR from 3M, and 65823-025LF, 65823-027LF, 65823-073LF, and 65823-239LF from Amphenol ICC (FCI). Non-compliant options remain available for applications without RoHS requirements.

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