3M 3408-53K2UG Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3408-53K2UG is a right-angle rectangular connector header with 16 positions at 2.54mm pitch, designed for through-hole mounting in board-to-board or cable applications. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The connector features shrouded 4-wall construction with kinked pin solder termination and latch lock/eject hooks for secure mating.

Key Parameters

Parameter	Value
Manufacturer Part Number	3408-53K2UG
Manufacturer	3M
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, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Kinked Pin, Solder
Contact Length - Mating	0.240" (6.10mm)
Contact Length - Post	0.112" (2.84mm)
Insulation Height	0.340" (8.64mm)
Contact Shape	Square
Contact Finish - Mating	Gold
Contact Material	Copper Alloy
Operating Temperature	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the 3408-53K2UG is determined by the following critical parameters that must remain consistent:

Core Electrical & Mechanical Compatibility:

16 positions, 2 rows, 0.100" (2.54mm) pitch
Right-angle through-hole mounting
Shrouded 4-wall construction
Male pin contact type
Square contact shape
Gold mating surface finish
Operating temperature range -55°C to 105°C or higher
UL94 V-0 flammability rating

Acceptable Variations:

Contact post length: 0.110" to 0.177" (2.79mm to 4.50mm)
Contact finish thickness on mating surface: 10.0µin to 30.0µin
Contact post finish: Tin or Tin-Lead
Contact material: Copper Alloy or Brass
Fastening type: Latch Lock/Eject Hooks (Long or Short) or Push-Pull
Insulation material: PCT or PBT, both glass-filled
Packaging: Bulk or Tray

Substitutes are grouped into three categories based on manufacturer and product status: 3M active alternatives, HARTING equivalents, and TE Connectivity options.

Parameter Comparison

Part Number	Manufacturer	Positions	Pitch	Mounting	Contact Post Length	Contact Finish - Mating	Operating Temp	Product Status	RoHS Status	Packaging
3408-53K2UG	3M	16 (2x8)	0.100"	Through Hole, R/A	0.112"	Gold	-55°C ~ 105°C	Obsolete	Non-compliant	-
D3408-5002-AR	3M	16 (2x8)	0.100"	Through Hole, R/A	0.112"	Gold	-55°C ~ 105°C	Active	Compliant	Tray
N3408-5002RB	3M	16 (2x8)	0.100"	Through Hole, R/A	0.112"	Gold	-55°C ~ 105°C	Active	Compliant	Bulk
09185165901	HARTING	16 (2x8)	0.100"	Through Hole, R/A	0.177"	Gold	-55°C ~ 125°C	Active	ROHS3 Compliant	Bulk
09185166901	HARTING	16 (2x8)	0.100"	Through Hole, R/A	0.177"	Gold	-55°C ~ 125°C	Active	ROHS3 Compliant	Bulk
09185166903	HARTING	16 (2x8)	0.100"	Through Hole, R/A	0.114"	Gold	-55°C ~ 125°C	Active	ROHS3 Compliant	Tray
09185166913	HARTING	16 (2x8)	0.100"	Through Hole, R/A	0.114"	Gold	-55°C ~ 125°C	Active	ROHS3 Compliant	Tray
09195166913	HARTING	16 (2x8)	0.100"	Through Hole, R/A	0.114"	-	-55°C ~ 125°C	Active	ROHS3 Compliant	Bulk
102322-3	TE Connectivity	16 (2x8)	0.100"	Through Hole, R/A	0.155"	Gold or Gold-Palladium	-65°C ~ 105°C	Active	Non-compliant	Tray
2-5499141-3	TE Connectivity	16 (2x8)	0.100"	Through Hole, R/A	0.110"	Gold or Gold-Palladium	-65°C ~ 105°C	Active	ROHS3 Compliant	Tray
499141-3	TE Connectivity	16 (2x8)	0.100"	Through Hole, R/A	0.110"	Gold or Gold-Palladium	-65°C ~ 105°C	Active	Not applicable	Bulk

Engineering Selection Recommendations

Primary Recommendation - 3M Active Alternatives: D3408-5002-AR and N3408-5002RB are direct 3M replacements for the obsolete 3408-53K2UG. Both maintain identical electrical and mechanical specifications while offering RoHS compliance. D3408-5002-AR is supplied in tray packaging, while N3408-5002RB is supplied in bulk. These parts are functionally equivalent with no design modifications required.

Secondary Recommendation - HARTING SEK Series: The HARTING 09185166913, 09185166903, 09185165901, 09185166901, and 09195166913 connectors provide full compatibility with extended operating temperature range (-55°C to 125°C versus -55°C to 105°C). All HARTING options are ROHS3 compliant. Contact post lengths vary between 0.114" and 0.177", which remain within acceptable mechanical envelope for standard applications. HARTING parts are available in both bulk and tray packaging.

Tertiary Recommendation - TE Connectivity AMP-Latch Series: TE Connectivity 102322-3, 2-5499141-3, and 499141-3 provide compatibility with extended lower temperature rating (-65°C versus -55°C). The 2-5499141-3 offers ROHS3 compliance. Contact post lengths range from 0.110" to 0.155". TE Connectivity parts feature brass contact material and gold or gold-palladium mating finish. These are suitable for applications requiring lower temperature performance.

Compliance Considerations: For new designs requiring RoHS compliance, select from: D3408-5002-AR, N3408-5002RB, HARTING SEK series (all variants), or TE Connectivity 2-5499141-3. The original 3408-53K2UG is RoHS non-compliant and should not be used in new production requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 3408-53K2UG with D3408-5002-AR without PCB modifications? A: Yes. D3408-5002-AR maintains identical pitch (0.100"), position count (16), mounting type (through-hole right-angle), and contact post length (0.112"). No PCB layout changes are required.

Q: What is the difference between HARTING 09185166913 and 09185165901? A: Both are HARTING SEK series 16-position headers with 0.100" pitch and gold mating finish. The primary difference is contact post length: 09185166913 has 0.114" post length, while 09185165901 has 0.177" post length. Select based on your PCB thickness and solder joint requirements.

Q: Are HARTING parts compatible with the original 3M connector housing? A: HARTING headers share the same 0.100" pitch and 16-position configuration, making them mechanically compatible with standard 0.100" pitch receptacles. However, verify shrouding geometry and keying slot alignment with your specific mating connector before production implementation.

Q: Why do some substitute parts show higher operating temperature ranges? A: HARTING and TE Connectivity parts are rated to -55°C to 125°C and -65°C to 105°C respectively, compared to the original -55°C to 105°C. Higher temperature ratings indicate enhanced material performance but do not affect compatibility in standard -55°C to 105°C applications.

Q: What packaging options are available? A: Substitutes are available in tray packaging (D3408-5002-AR, 09185166903, 09185166913, 102322-3, 2-5499141-3) or bulk packaging (N3408-5002RB, 09185165901, 09185166901, 09195166913, 499141-3). Select based on your procurement and assembly requirements.

Q: Is RoHS compliance mandatory for my application? A: RoHS compliance is required for products sold in the European Union and many other regulated markets. If your application requires RoHS compliance, avoid 3408-53K2UG, 102322-3, and 499141-3. Select from D3408-5002-AR, N3408-5002RB, HARTING SEK series, or TE Connectivity 2-5499141-3.

Q: Can I use TE Connectivity 102322-3 as a direct replacement? A: 102322-3 is mechanically and electrically compatible but is RoHS non-compliant. Use only in legacy applications or where RoHS compliance is not required. For new designs, select a RoHS-compliant alternative.

Q: What is the difference between contact post finishes (Tin versus Tin-Lead)? A: Both Tin and Tin-Lead finishes provide equivalent solder joint reliability. Tin-Lead finishes are found on legacy parts (3408-53K2UG, 102322-3, 499141-3). Tin finishes are standard on modern RoHS-compliant parts. Both are compatible with standard lead-free solder processes.

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