3M 3408-6002UG Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3408-6002UG is a through-hole rectangular connector header with 16 positions at 2.54mm pitch, featuring shrouded 4-wall design and push-pull fastening. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The connector is designed for board-to-board or cable applications with solder termination and operates across the industrial temperature range of -55°C to 105°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	3408-6002UG
Manufacturer	3M
Category	Rectangular Connectors
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
Fastening Type	Push-Pull
Operating Temperature	-55°C ~ 105°C
Current Rating	1A
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the 3408-6002UG is determined by the following critical parameters that must remain consistent:

Connector type: Header with male pins
Position count: 16 positions in 2-row configuration
Mating pitch: 0.100" (2.54mm) with 0.100" row spacing
Shrouding: 4-wall shrouded design
Mounting: Through-hole solder termination
Fastening: Push-pull mechanism
Operating temperature range: -55°C to 105°C minimum

Substitute parts are grouped into two categories based on design variations:

Category A - Direct Mechanical Equivalents (3M Series): Parts D3408-6002-AR and N3408-6002RB maintain identical mechanical dimensions and mating interfaces while offering improved compliance status and higher current ratings.

Category B - Cross-Manufacturer Alternatives (Amphenol ICC and CW Industries): Parts 71918-016LF, CWN-350-16-0021, CWN-351-16-0000, CWN-351-16-0021, CWN-352-16-0021, CWN-360-16-0000, CWN-360-16-0021, and CWN-361-16-0000 provide functional equivalence with variations in contact geometry, fastening subtypes, and post length specifications.

Parameter Comparison

Parameter	3408-6002UG	D3408-6002-AR	N3408-6002RB	71918-016LF	CWN-350-16-0021	CWN-351-16-0000	CWN-360-16-0000
Manufacturer	3M	3M	3M	Amphenol ICC (FCI)	CW Industries	CW Industries	CW Industries
Number of Positions	16	16	16	16	16	16	16
Number of Rows	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)
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)
Shrouding	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
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Latch Lock/Eject Hooks, Short	Push-Pull
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.228" (5.80mm)	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)	0.114" (2.90mm)	0.090" (2.29mm)	0.090" (2.29mm)	0.155" (3.94mm)
Insulation Height	0.680" (17.27mm)	0.680" (17.27mm)	0.680" (17.27mm)	0.685" (17.40mm)	0.681" (17.30mm)	0.681" (17.30mm)	0.681" (17.30mm)
Contact Shape	Square	Square	Square	Square	Circular	Circular	Circular
Contact Finish - Mating	Gold	Gold	Gold	Gold, GXT™	Gold	Gold	Gold
Contact Material	Copper Alloy	Brass	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	Not specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	1A	1.75A	1.75A	Not specified	1A	1A	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
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: D3408-6002-AR

The D3408-6002-AR is the preferred substitute for the obsolete 3408-6002UG. This part maintains identical mechanical and electrical interfaces while offering ROHS3 compliance and improved current rating of 1.75A versus the original 1A. The D3000 series design preserves the same contact geometry, mating dimensions, and operating temperature range. Active product status ensures long-term availability and supply chain stability.

Secondary Recommendation: N3408-6002RB

The N3408-6002RB provides an alternative from the 3M 3000 series with RoHS compliance and 1.75A current rating. This part maintains identical mechanical compatibility with the original design while offering improved environmental compliance. Bulk packaging availability supports high-volume applications.

Cross-Manufacturer Alternatives

The Amphenol ICC 71918-016LF and CW Industries CWN series connectors provide functional equivalence with design variations. These alternatives are suitable when mechanical interface flexibility exists or when specific fastening mechanisms are required. The CWN-350-16-0021 and CWN-360-16-0000 series offer extended operating temperature to 125°C and ROHS3 compliance. Selection among these alternatives depends on specific post length requirements and fastening type compatibility with mating connectors.

Frequently Asked Questions (FAQ)

Q: Can the 3408-6002UG be directly replaced with D3408-6002-AR without PCB redesign?

A: Yes. The D3408-6002-AR maintains identical through-hole mounting footprint, mating pitch of 0.100" (2.54mm), 16-position 2-row configuration, and shrouded 4-wall design. No PCB layout changes are required.

Q: What is the primary difference between D3408-6002-AR and N3408-6002RB?

A: Both parts are mechanically and electrically equivalent with identical current ratings of 1.75A and operating temperature range of -55°C to 105°C. The primary difference is contact material: D3408-6002-AR uses brass contacts while N3408-6002RB uses copper alloy. Both are RoHS compliant and suitable for direct substitution.

Q: Are CW Industries CWN series connectors compatible with the original 3408-6002UG mating connectors?

A: CWN series parts maintain the same 0.100" (2.54mm) pitch and 16-position configuration. However, contact shape differs (circular versus square), and post length varies by model. Compatibility depends on the specific mating connector design. CWN-350-16-0021 and CWN-360-16-0000 with push-pull fastening offer closest mechanical compatibility.

Q: What is the significance of the fastening type variation in CWN series parts?

A: The original 3408-6002UG uses push-pull fastening. CWN-351 and CWN-352 series use latch lock/eject hooks instead. This affects mating connector compatibility. For direct replacement, select CWN-350 or CWN-360 series which retain push-pull fastening.

Q: Does the 71918-016LF from Amphenol ICC provide full compatibility?

A: The 71918-016LF maintains 16-position 2-row configuration at 0.100" (2.54mm) pitch with push-pull fastening and shrouded 4-wall design. Contact length for mating is 0.228" (5.80mm) versus 0.240" (6.10mm) on the original part. This minor difference may affect mating depth. Verify mating connector specifications before selection.

Q: What packaging options are available for substitute parts?

A: D3408-6002-AR is supplied in tray packaging. N3408-6002RB is available in bulk. CWN series parts are available in bulk or tube packaging depending on specific model number. 71918-016LF is supplied in tube packaging. Packaging selection affects handling and storage requirements.

Q: Are all substitute parts RoHS compliant?

A: The original 3408-6002UG is RoHS non-compliant. All recommended substitutes—D3408-6002-AR, N3408-6002RB, 71918-016LF, and CWN series—are RoHS compliant or ROHS3 compliant, meeting current environmental regulations.

Q: What is the current rating difference between the original part and substitutes?

A: The 3408-6002UG is rated at 1A. D3408-6002-AR and N3408-6002RB both provide 1.75A rating. CWN series and 71918-016LF maintain 1A rating or do not specify current rating. Higher current ratings on 3M substitutes provide design margin for power distribution applications.

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