3M 3408-5303 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3408-5303 is a through-hole, right-angle rectangular connector header with 16 positions at 0.100" (2.54mm) pitch. This component features shrouded 4-wall construction with male pins, solder termination, and latch lock/eject hook fastening. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

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, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Solder
Operating Temperature	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters:

Connector type (Header)
Contact type (Male Pin)
Number of positions and rows (16 positions, 2 rows)
Mating pitch (0.100" / 2.54mm)
Row spacing (0.100" / 2.54mm)
Mounting configuration (Through Hole, Right Angle)
Shrouding style (Shrouded - 4 Wall)
Termination method (Solder)
Operating temperature range (-55°C ~ 105°C minimum)
Current rating (1.75A minimum)
Flammability rating (UL94 V-0)

Substitutes are grouped by fastening type variation (Latch Lock/Eject Hooks vs. Push-Pull) and contact post length, which affect mating interface compatibility. Packaging format (Bulk vs. Tray) and RoHS compliance status are secondary considerations that do not affect electrical or mechanical interchangeability.

Parameter Comparison

Part Number	Manufacturer	Series	Fastening Type	Contact Length - Post	Insulation Material	Contact Material	Operating Temperature	RoHS Status	Product Status
3408-5303	3M	3000	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	PCT, Polyester, Glass Filled	Copper Alloy	-55°C ~ 105°C	Non-compliant	Obsolete
N3408-5303RB	3M	3000	Latch Lock/Eject Hooks, Long	0.155" (3.94mm)	PCT, Polyester, Glass Filled	Copper Alloy	-55°C ~ 105°C	Compliant	Active
D3408-5002-AR	3M	D3000	Push-Pull	0.112" (2.84mm)	PCT, Polyester, Glass Filled	Brass	-55°C ~ 105°C	Compliant	Active
N3408-5002RB	3M	3000	Push-Pull	0.112" (2.84mm)	PCT, Polyester, Glass Filled	Copper Alloy	-55°C ~ 105°C	Compliant	Active
09185165911	HARTING	SEK	Latch Lock/Eject Hooks, Short	0.177" (4.50mm)	PBT, Glass Filled	Copper Alloy	-55°C ~ 125°C	ROHS3 Compliant	Active
09185165913	HARTING	SEK	Latch Lock/Eject Hooks, Short	0.114" (2.90mm)	PBT, Glass Filled	Copper Alloy	-55°C ~ 125°C	ROHS3 Compliant	Active
09185166901	HARTING	SEK	Latch Lock/Eject Hooks, Long	0.177" (4.50mm)	PBT, Glass Filled	Copper Alloy	-55°C ~ 125°C	ROHS3 Compliant	Active
09185166903	HARTING	SEK	Latch Lock/Eject Hooks, Long	0.114" (2.90mm)	PBT, Glass Filled	Copper Alloy	-55°C ~ 125°C	ROHS3 Compliant	Active
09185166911	HARTING	SEK	Latch Lock/Eject Hooks, Short	0.177" (4.50mm)	PBT, Glass Filled	Copper Alloy	-55°C ~ 125°C	ROHS3 Compliant	Active
09185166913	HARTING	SEK	Latch Lock/Eject Hooks, Short	0.114" (2.90mm)	PBT, Glass Filled	Copper Alloy	-55°C ~ 125°C	ROHS3 Compliant	Active
09185167901	HARTING	SEK	Latch Lock/Eject Hooks, Long	0.177" (4.50mm)	PBT, Glass Filled	Copper Alloy	-55°C ~ 125°C	ROHS3 Compliant	Active

Engineering Selection Recommendations

Primary Substitute (Direct Replacement): N3408-5303RB is the direct equivalent to 3408-5303. Both parts share identical electrical and mechanical specifications, including fastening type (Latch Lock/Eject Hooks, Long) and contact post length (0.155" / 3.94mm). The primary difference is RoHS compliance status and active product status. This part is suitable for direct substitution in new designs and legacy system maintenance.

Alternative Substitutes (Functional Equivalents): D3408-5002-AR, N3408-5002RB, and HARTING SEK series parts (09185165911, 09185165913, 09185166901, 09185166903, 09185166911, 09185166913, 09185167901) meet all critical electrical and mechanical parameters. These alternatives differ in fastening mechanism (Push-Pull vs. Latch Lock/Eject Hooks) and contact post length. Selection depends on mating connector compatibility and board layout constraints.

Compliance Considerations: All active substitute parts carry current RoHS compliance certifications (RoHS Compliant or ROHS3 Compliant), whereas the original 3408-5303 is RoHS non-compliant. HARTING parts provide extended operating temperature range (-55°C ~ 125°C vs. -55°C ~ 105°C), offering additional thermal margin for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can N3408-5303RB replace 3408-5303 directly on existing PCBs? A: Yes. N3408-5303RB is mechanically and electrically identical to 3408-5303. Both use Latch Lock/Eject Hooks (Long) fastening and 0.155" (3.94mm) contact post length. No PCB redesign is required.

Q: What is the difference between Latch Lock/Eject Hooks (Long) and (Short) variants? A: The fastening hook length affects mating connector engagement depth. Long hooks provide deeper engagement; Short hooks provide shallower engagement. Mating connector design determines which variant is compatible. Verify mating connector specifications before substitution.

Q: Can I use HARTING 09185166903 instead of 3M 3408-5303? A: HARTING 09185166903 meets all critical electrical and mechanical parameters (16 positions, 2.54mm pitch, shrouded 4-wall, solder termination, 1.75A current rating, UL94 V-0). However, it uses Latch Lock/Eject Hooks (Long) with 0.114" (2.90mm) contact post length, differing from the original 0.155" (3.94mm). Compatibility depends on mating connector design. Verify mating interface specifications.

Q: What is the impact of contact post length variation? A: Contact post length determines how far the pin extends into the mating connector. Variations (0.112", 0.114", 0.155", 0.177") affect mating depth and engagement force. Mismatched post length can result in incomplete mating or excessive insertion force. Always verify mating connector specifications.

Q: Are HARTING parts suitable for legacy 3M connector systems? A: HARTING SEK series parts share identical pitch (0.100" / 2.54mm), row spacing (0.100" / 2.54mm), and shrouding configuration. However, fastening mechanism differences (Latch Lock/Eject Hooks vs. Push-Pull) and contact post length variations may affect compatibility with existing mating connectors. Verify mating connector specifications before substitution.

Q: What packaging options are available? A: Substitute parts are available in Bulk and Tray packaging formats. Packaging does not affect electrical or mechanical performance. Selection is based on procurement volume and handling requirements.

Q: Do all substitutes support the same current rating? A: The original 3408-5303 and 3M substitutes (N3408-5303RB, D3408-5002-AR, N3408-5002RB) are rated for 1.75A. HARTING parts do not specify current rating in provided data. Verify current requirements against application specifications.

Q: What is the difference between PCT and PBT insulation materials? A: 3M parts use Polycyclohexylenedimethylene Terephthalate (PCT) with polyester and glass fill. HARTING parts use Polybutylene Terephthalate (PBT) with glass fill. Both materials meet UL94 V-0 flammability requirements. Material selection affects thermal and chemical resistance characteristics specific to application environment.

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