3M 3408-6402 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The 3M 3408-6402 is a shrouded rectangular connector header for through-hole mounting with 16 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This connector features male pins with gold-plated mating contacts and tin-lead plated posts, designed for board-to-board or cable interconnection applications. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	16
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Shrouding	Shrouded - 4 Wall
Mounting Type	Through Hole
Termination	Solder
Contact Finish - Mating	Gold
Contact Finish - Post	Tin-Lead
Operating Temperature	-55°C ~ 105°C
Current Rating	1A
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the 3M 3408-6402 is determined by strict equivalence in the following parameters:

Connector type (Header)
Contact type (Male Pin)
Number of positions (16) and row configuration (2 rows)
Mating pitch (0.100" / 2.54mm)
Row spacing (0.100" / 2.54mm)
Shrouding style (Shrouded - 4 Wall)
Mounting method (Through Hole)
Termination method (Solder)
Contact finish on mating surface (Gold)
Flammability rating (UL94 V-0)

Substitute parts are grouped into two categories based on product status and compliance posture:

Active Status Substitutes: TE Connectivity AMP-Latch series (5499206-3, 5102321-3, 5499923-3, 5746443-3) and Amphenol ICC Quickie™ series (53611-G16-4LF, 53611-S16-4LF, 71980-116LF). These parts maintain the core electrical and mechanical interface while offering active product support and improved compliance profiles.

Compliance Variations: Substitute parts differ in RoHS compliance status and contact finish thickness specifications. Parts designated as ROHS3 Compliant (5102321-3, 5499923-3) represent updated formulations. Contact finish thickness on mating surfaces ranges from 15.0µin to 30.0µin, and post finishes vary between tin and tin-lead compositions.

Parameter Comparison

Parameter	3M 3408-6402	TE 5499206-3	TE 5102321-3	TE 5499923-3	TE 5746443-3	Amphenol 53611-G16-4LF	Amphenol 53611-S16-4LF	Amphenol 71980-116LF
Connector Type	Header	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	16	16	16	16	16	16	16	16
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)
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
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Press-Fit, Solder	Solder	Solder	Kinked Pin, Solder
Contact Finish - Mating	Gold	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold, GXT™
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Operating Temperature	-55°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C	Not specified	Not specified	Not specified
Current Rating	1A	1A	1A per Contact	1A per Contact	1A per Contact	Not specified	Not specified	Not specified
Voltage Rating	Not specified	250VAC	250VAC	250VAC	Not specified	Not specified	Not specified
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	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain functional and mechanical compatibility with the 3M 3408-6402 across the critical interface parameters: 16-position, 2-row configuration at 0.100" pitch with shrouded 4-wall design and through-hole solder termination.

For RoHS Compliance Requirements: Select TE Connectivity 5102321-3, 5499923-3, or Amphenol ICC 53611-G16-4LF, 53611-S16-4LF, or 71980-116LF. These parts carry active RoHS or ROHS3 compliance certifications.

For Extended Temperature Range: TE Connectivity AMP-Latch series (5499206-3, 5102321-3, 5499923-3, 5746443-3) and Amphenol ICC Quickie™ series support -65°C to 105°C operating range, exceeding the original -55°C to 105°C specification.

For Voltage Rating Specification: TE Connectivity parts (5499206-3, 5102321-3, 5499923-3) are rated for 250VAC, providing explicit voltage specification where the original part does not.

For Active Product Support: All substitute parts carry Active product status, ensuring continued availability and manufacturer support compared to the Obsolete status of the 3M 3408-6402.

For Contact Finish Post Composition: TE Connectivity and Amphenol ICC substitutes use tin-only post finish instead of tin-lead, aligning with modern manufacturing practices and RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can TE Connectivity 5499206-3 directly replace the 3M 3408-6402?

A: Yes. Both parts share identical mating pitch (0.100"), row configuration (2 rows, 16 positions), shrouding style (4-wall), and mounting method (through-hole solder). The TE part offers improved compliance status (RoHS Compliant) and extended temperature range (-65°C to 105°C).

Q: What is the difference between TE 5102321-3 and TE 5499206-3?

A: Both are AMP-Latch series headers with identical electrical and mechanical interfaces. The primary difference is contact post length: 5102321-3 has 0.155" (3.94mm) posts versus 5499206-3 with 0.110" (2.79mm) posts. Select based on PCB thickness and mating connector depth requirements.

Q: Are Amphenol ICC Quickie™ series parts (53611-G16-4LF, 53611-S16-4LF) compatible?

A: Yes. Both Amphenol parts maintain the required 0.100" pitch, 16-position, 2-row shrouded configuration. The difference between 53611-G16-4LF and 53611-S16-4LF is contact finish thickness on the mating surface: 30.0µin versus 15.0µin respectively. Both are RoHS Compliant.

Q: What does the packaging designation mean?

A: Packaging refers to the quantity and format of shipment. Tray packaging is standard for production quantities. Bulk packaging (5499923-3, 5746443-3) offers alternative handling for high-volume procurement. Tube packaging (71980-116LF) is used for smaller quantities.

Q: Does the 3M 3408-6402 have a voltage rating?

A: The original part does not specify a voltage rating in the provided data. TE Connectivity substitutes (5499206-3, 5102321-3, 5499923-3) are rated for 250VAC, providing explicit electrical specification for applications requiring voltage rating documentation.

Q: Can I use TE 5746443-3 with press-fit termination instead of solder?

A: TE 5746443-3 supports both press-fit and solder termination methods. If your PCB design requires press-fit assembly, this part offers that capability while maintaining all other interface parameters with the original 3M 3408-6402.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant?

A: ROHS3 Compliant (5102321-3, 5499923-3) represents updated formulations meeting the latest RoHS 3 directive requirements. RoHS Compliant parts meet the original RoHS directive. Both are acceptable for RoHS-regulated applications; ROHS3 designation indicates compliance with the most current standard.

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