3M 3429-1002 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3429-1002 is a through-hole, right-angle rectangular connector header with 26 positions at 0.100" (2.54mm) pitch, designed for board-to-board or cable interconnection applications. The part operates across -55°C to 105°C with a current rating of 1.75A and features shrouded 3-wall construction with gold-plated mating contacts and tin-lead post finish.

The 3429-1002 carries an obsolete product status. Equivalent and substitute parts are available from 3M's active product lines and alternative manufacturers, offering improved compliance profiles and extended availability.

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
Contact Length - Mating	0.240" (6.10mm)
Contact Length - Post	0.112" (2.84mm)
Insulation Height	0.310" (7.87mm)
Contact Shape	Square
Contact Finish - Mating	Gold
Contact Finish - Post	Tin-Lead
Contact Material	Copper Alloy
Operating Temperature	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters: connector type (header), contact type (male pin), number of positions (26), number of rows (2), mating pitch (0.100"/2.54mm), row spacing (0.100"/2.54mm), mounting type (through hole, right angle), termination (solder), contact shape, contact finish on mating surface (gold), insulation material, and operating temperature range (-55°C ~ 105°C).

Acceptable variations within substitution groups include:

Shrouding configuration (3-wall to 4-wall): Increases mechanical protection without affecting electrical compatibility
Contact finish on post (tin-lead to tin): Maintains solderability and reliability
Contact material (copper alloy to brass): Maintains electrical and mechanical performance
Insulation height variance: Accommodates different shrouding wall counts
Contact finish thickness on mating surface: Maintains contact reliability within specified ranges
Fastening type variation (push-pull to latch lock/eject hooks): Provides alternative mating mechanisms
Packaging format (bulk to tray): Does not affect component functionality
Product status transition (obsolete to active): Ensures continued supply availability

Non-substitutable parameters include: number of positions, pitch, row spacing, mounting orientation, contact type, and operating temperature range.

Parameter Comparison

Parameter	3429-1002	N3429-1002RB	3429-5002	D3429-5002-AR	N3429-5002RB	65823-073	65823-169	CWN-300-26-0021
Manufacturer	3M	3M	3M	3M	3M	Amphenol ICC (FCI)	Amphenol ICC (FCI)	CW Industries
Product Status	Obsolete	Active	Obsolete	Active	Active	Active	Active	Active
Number of Positions	26	26	26	26	26	26	26	26
Number of Rows	2	2	2	2	2	2	2	2
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)
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)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Shrouding	Shrouded - 3 Wall	Shrouded - 3 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Contact Shape	Square	Square	Square	Square	Square	Circular	Circular	Circular
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold
Contact Finish Thickness - Mating	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	10.0µin (0.25µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)
Contact Finish - Post	Tin-Lead	Tin	Tin-Lead	Tin	Tin	Not specified	Not specified	Nickel
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy	Brass	Copper Alloy	Phosphor Bronze Alloy	Phosphor Bronze Alloy	Phosphor Bronze
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	Not specified	Not specified	-55°C ~ 125°C
Current Rating (Amps)	1.75A	1.75A	1.75A	1.75A	1.75A	Not specified	Not specified	1A
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
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant
Packaging	Not specified	Bulk	Bulk	Tray	Bulk	Bulk	Bulk	Bulk

Engineering Selection Recommendations

For direct replacement of the obsolete 3429-1002 with minimal design impact, N3429-1002RB is the primary equivalent. This part maintains identical electrical and mechanical specifications while offering active product status and RoHS compliance. The only material change is post finish (tin-lead to tin), which maintains solderability and reliability.

For applications requiring enhanced mechanical protection or updated compliance certifications, N3429-5002RB provides 4-wall shrouding with ROHS3 compliance and active availability. This variant introduces increased insulation height (0.340" vs. 0.310") and requires PCB layout verification for clearance.

D3429-5002-AR offers ROHS3 compliance with tray packaging and represents 3M's current-generation D3000 series. Contact material changes to brass and mating finish thickness reduces to 10.0µin, requiring electrical performance validation in high-reliability applications.

For cross-manufacturer alternatives, 65823-169 (Amphenol ICC Quickie™ series) and CWN-300-26-0021 (CW Industries) provide active product status and RoHS compliance. Both introduce contact shape changes (circular vs. square) and alternative fastening mechanisms. CWN-300-26-0021 extends operating temperature to 125°C but reduces current rating to 1A.

Selection should prioritize active product status for new designs. RoHS compliance is required for regulated markets. Contact geometry and fastening type changes require mating connector compatibility verification.

Frequently Asked Questions (FAQ)

Q: Can N3429-1002RB directly replace 3429-1002 without PCB modifications?

A: Yes. N3429-1002RB maintains identical pitch (0.100"/2.54mm), position count (26), row spacing (0.100"/2.54mm), mounting type (through hole, right angle), and insulation height (0.310"). The post finish change from tin-lead to tin does not affect PCB footprint or solderability.

Q: What is the impact of switching from 3-wall to 4-wall shrouding?

A: Four-wall shrouding increases insulation height from 0.310" to 0.340", providing additional mechanical protection and keying robustness. PCB clearance above the connector must be verified. Electrical performance remains unchanged.

Q: Are Amphenol ICC 65823-073 and 65823-169 compatible with 3M 3429-1002 mating connectors?

A: Both Amphenol parts maintain 0.100" (2.54mm) pitch and 26-position configuration. However, contact shape differs (circular vs. square), and fastening mechanism changes to latch lock/eject hooks. Mating connector compatibility must be confirmed with the connector manufacturer.

Q: What compliance advantages does N3429-5002RB offer over 3429-1002?

A: N3429-5002RB carries ROHS3 compliance status, meeting current regulatory requirements for restricted substances. The original 3429-1002 is RoHS non-compliant. Both maintain UL94 V-0 flammability rating and equivalent electrical performance.

Q: Can CWN-300-26-0021 be used in applications requiring 1.75A current rating?

A: CWN-300-26-0021 is rated for 1A maximum current, below the 1.75A specification of 3429-1002. This part is suitable only for applications with current requirements not exceeding 1A.

Q: What is the difference between bulk and tray packaging?

A: Bulk packaging (N3429-1002RB, N3429-5002RB, 65823-073, 65823-169, CWN-300-26-0021) provides loose component quantities suitable for high-volume assembly. Tray packaging (D3429-5002-AR) organizes components in segmented trays for automated pick-and-place equipment, improving assembly efficiency and reducing handling damage.

Q: Does the contact material change from copper alloy to brass affect electrical performance?

A: Brass (D3429-5002-AR) and copper alloy maintain equivalent electrical conductivity and contact resistance characteristics for this application. The change does not degrade electrical performance but may affect long-term corrosion resistance in specific environmental conditions.

Q: Why does D3429-5002-AR have reduced mating contact finish thickness (10.0µin vs. 30.0µin)?

A: Reduced gold plating thickness (10.0µin/0.25µm) on D3429-5002-AR represents cost optimization in 3M's current product line. This thickness remains within industry standards for contact reliability. Applications with extended mating cycles or corrosive environments should specify 30.0µin thickness.

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