3M 3408-2302 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3408-2302 is a through-hole rectangular connector header with 16 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This connector features shrouded 3-wall design with male pins, solder termination, and latch lock/eject hook fastening. The part is classified as obsolete, making identification of active equivalent and substitute components essential 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)
Mounting Type	Through Hole
Termination	Solder
Shrouding	Shrouded
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1A
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 3408-2302 is determined by the following critical parameters:

Connector geometry: 16-position, 2-row configuration with 0.100" (2.54mm) pitch and row spacing
Contact interface: Male pin contacts with 0.240" (6.10mm) mating length
Mounting and termination: Through-hole solder termination
Environmental rating: UL94 V-0 flammability classification and -55°C ~ 105°C operating range
Electrical performance: 1A minimum current rating

The three substitute parts listed below maintain these core parameters while offering variations in shrouding design, fastening mechanism, contact material composition, and regulatory compliance status.

Parameter Comparison

Parameter	3408-2302	D3408-6002-AR	N3408-6002RB	CWN-352-16-0021
Manufacturer	3M	3M	3M	CW Industries
Product Status	Obsolete	Active	Active	Active
Connector Type	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	16	16	16	16
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	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 3 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Latch Lock/Eject Hooks, Long	Push-Pull	Push-Pull	Latch Lock/Eject Hooks, Long
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)
Contact Length - Post	0.112" (2.84mm)	0.112" (2.84mm)	0.112" (2.84mm)	0.090" (2.29mm)
Insulation Height	0.680" (17.27mm)	0.680" (17.27mm)	0.680" (17.27mm)	0.681" (17.30mm)
Contact Shape	Square	Square	Square	Circular
Contact Finish - Mating	Gold	Gold	Gold	Gold
Contact Material	Copper Alloy	Brass	Copper Alloy	Phosphor Bronze
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C
Current Rating (Amps)	1A	1.75A	1.75A	1A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant

Engineering Selection Recommendations

D3408-6002-AR (3M, Active): This part maintains 3M series compatibility with upgraded shrouding (4-wall vs. 3-wall) and push-pull fastening. Current rating increases to 1.75A. ROHS3 compliance status supports modern procurement requirements. Contact material changes from copper alloy to brass, with reduced mating finish thickness (10.0µin vs. 30.0µin). Suitable for applications requiring enhanced regulatory compliance and higher current capacity.

N3408-6002RB (3M, Active): This 3M alternative retains the original copper alloy contact material and maintains 30.0µin mating finish thickness. Shrouding upgrades to 4-wall with push-pull fastening. Current rating increases to 1.75A. RoHS compliance and bulk packaging availability support cost-effective procurement. Recommended for designs requiring material consistency with the original 3408-2302 while transitioning to active product status.

CWN-352-16-0021 (CW Industries, Active): This cross-manufacturer substitute from CW Industries maintains latch lock/eject hook fastening identical to the original design. Operating temperature extends to 125°C. Contact shape differs (circular vs. square) and contact post length is shorter (0.090" vs. 0.112"). Phosphor bronze contact material with nickel finish provides alternative material composition. ROHS3 compliance and active status support long-term availability. Suitable for applications where fastening mechanism consistency and extended temperature range are priorities.

Frequently Asked Questions (FAQ)

Q: Can the D3408-6002-AR replace the 3408-2302 in existing designs?

A: The D3408-6002-AR maintains all critical geometric and electrical parameters (16-position, 2-row, 0.100" pitch, 0.240" mating contact length, through-hole solder termination). The primary differences are shrouding design (4-wall vs. 3-wall), fastening mechanism (push-pull vs. latch lock), and contact material (brass vs. copper alloy). PCB layout compatibility is maintained. Connector mating interface compatibility depends on the receptacle design used in the application.

Q: What is the difference between the two 3M substitutes?

A: Both D3408-6002-AR and N3408-6002RB are 3M active products with identical geometric specifications and 1.75A current rating. The key difference is contact material: D3408-6002-AR uses brass with 10.0µin mating finish, while N3408-6002RB uses copper alloy with 30.0µin mating finish matching the original 3408-2302. N3408-6002RB is available in bulk packaging, while D3408-6002-AR is supplied in trays.

Q: Why does the CWN-352-16-0021 have a shorter contact post length?

A: The CWN-352-16-0021 contact post length is 0.090" (2.29mm) compared to 0.112" (2.84mm) for the 3408-2302. This difference reflects CW Industries' design specifications for this connector series. PCB hole depth and solder joint geometry must be evaluated for compatibility in the specific application.

Q: Are all substitute parts RoHS compliant?

A: The original 3408-2302 is RoHS non-compliant. All three substitute parts (D3408-6002-AR, N3408-6002RB, and CWN-352-16-0021) are RoHS compliant, supporting modern procurement and environmental regulations.

Q: What is the impact of the fastening mechanism change from latch lock to push-pull?

A: The D3408-6002-AR and N3408-6002RB use push-pull fastening instead of the original latch lock/eject hooks. This affects mating and unmating force characteristics and connector retention behavior. The CWN-352-16-0021 retains latch lock fastening identical to the original design. Connector engagement force and retention requirements must be evaluated for the specific application.

Q: Can the CWN-352-16-0021 be used in applications requiring the original operating temperature range?

A: The CWN-352-16-0021 extends the operating temperature range to -55°C ~ 125°C, exceeding the original 3408-2302 specification of -55°C ~ 105°C. This part is suitable for applications within the original temperature range and for designs requiring extended high-temperature performance.

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