3M 3431-1003 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3431-1003 is a through-hole, right-angle rectangular connector header with 34 positions at 2.54mm pitch. This connector features shrouded 3-wall design with male pins, solder termination, and push-pull fastening. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Active alternatives from 3M and Amphenol ICC (FCI) provide direct functional replacements with enhanced specifications and current product status.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	34
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Shrouding	Shrouded
Operating Temperature	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution for the 3431-1003 is determined by the following critical parameters:

34-position, 2-row configuration at 0.100" (2.54mm) pitch
Through-hole, right-angle mounting
Solder termination with male pin contact type
Shrouded design with keying slot and mounting flange
Operating temperature range -55°C to 105°C
Current rating of 1.75A
UL94 V-0 flammability rating

Substitute parts must maintain these core electrical and mechanical specifications. Variations in contact length, shrouding wall count (3-wall to 4-wall), contact shape (square to circular), fastening mechanism (push-pull to latch lock), and contact material (copper alloy to brass or phosphor bronze) are permitted within the allowed parameter set. Compliance status differences (RoHS, REACH) represent product evolution and do not affect functional interchangeability.

Parameter Comparison

Parameter	3431-1003	D3431-5002-AR	N3431-5002RB	65823-031LF	65823-033LF	65823-079LF	65823-081LF	65823-083LF	65823-175	65823-213	65823-213LF
Manufacturer	3M	3M	3M	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Connector Type	Header	Header	Header	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	Male Pin	Male Pin	Male Pin
Number of Positions	34	34	34	34	34	34	34	34	34	34	34
Number of Rows	2	2	2	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)	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)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 3 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)
Contact Length - Post	0.155" (3.94mm)	0.112" (2.84mm)	0.112" (2.84mm)	0.105" (2.67mm)	0.150" (3.81mm)	0.105" (2.67mm)	0.150" (3.81mm)	0.675" (17.15mm)	0.105" (2.67mm)	0.150" (3.81mm)	0.150" (3.81mm)
Insulation Height	0.310" (7.87mm)	0.340" (8.64mm)	0.340" (8.64mm)	0.305" (7.75mm)	0.305" (7.75mm)	0.305" (7.75mm)	0.305" (7.75mm)	0.305" (7.75mm)	0.305" (7.75mm)	0.305" (7.75mm)	0.305" (7.75mm)
Contact Shape	Square	Square	Square	Circular	Circular	Circular	Circular	Square	Circular	Circular	Circular
Contact Finish - Mating	Gold	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™
Contact Material	Copper Alloy	Brass	Copper Alloy	Phosphor Bronze Alloy	Phosphor Bronze Alloy	Phosphor Bronze Alloy	Phosphor Bronze Alloy	Phosphor Bronze Alloy	Phosphor Bronze Alloy	Phosphor Bronze Alloy	Phosphor Bronze Alloy
Insulation Material	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled
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	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	Black	Black	Black	Blue	Blue	Blue	Blue	Blue	Blue	Blue	Blue
Current Rating	1.75A	1.75A	1.75A	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS non-compliant	RoHS non-compliant	RoHS Compliant

Engineering Selection Recommendations

For applications requiring active product status and current compliance certifications, D3431-5002-AR and N3431-5002RB from 3M provide direct 3M ecosystem continuity. Both maintain the 3M 3000/D3000 series lineage and offer ROHS3 compliance.

D3431-5002-AR is recommended for new designs requiring tray packaging and ROHS3 compliance. N3431-5002RB is suitable for bulk applications with ROHS3 compliance and REACH unaffected status.

Amphenol ICC (FCI) Quickie™ series substitutes (65823-031LF, 65823-033LF, 65823-079LF, 65823-081LF, 65823-083LF, 65823-175, 65823-213, 65823-213LF) provide alternative sourcing with active product status. The 65823-213LF variant offers RoHS compliance and REACH affected status. Fastening mechanism differences (latch lock versus push-pull) and contact post length variations must be evaluated against specific application requirements.

For legacy system maintenance where RoHS non-compliance is acceptable, 65823-175 and 65823-213 remain available with active status.

Frequently Asked Questions (FAQ)

Q: Can D3431-5002-AR directly replace 3431-1003 in existing designs?

A: D3431-5002-AR maintains the same 34-position, 2.54mm pitch, through-hole right-angle configuration. The 4-wall shrouding provides enhanced mechanical protection compared to the original 3-wall design. Contact post length differs (0.112" versus 0.155"), requiring PCB footprint verification. ROHS3 compliance represents product evolution and does not affect electrical function.

Q: What is the difference between push-pull and latch lock fastening types?

A: The 3431-1003 uses push-pull fastening. Amphenol ICC Quickie™ variants 65823-079LF, 65823-081LF, 65823-083LF, 65823-175, 65823-213, and 65823-213LF employ latch lock/eject hooks fastening. Both mechanisms provide secure mating; latch lock variants offer positive ejection capability. Application requirements determine which fastening type is appropriate.

Q: Are circular contact shapes compatible with square contact applications?

A: Contact shape (circular versus square) is a mechanical parameter that affects contact geometry and mating force characteristics. Amphenol ICC Quickie™ series primarily uses circular contacts, while 3M variants and 65823-083LF use square contacts. Compatibility depends on the mating connector design and must be verified against specific application requirements.

Q: What packaging options are available?

A: Substitute parts are available in tray packaging (D3431-5002-AR, 65823-079LF, 65823-083LF) and bulk packaging (N3431-5002RB, 65823-031LF, 65823-033LF, 65823-081LF, 65823-175, 65823-213, 65823-213LF). Packaging selection depends on production volume and handling requirements.

Q: Which substitute offers the best RoHS and REACH compliance?

A: D3431-5002-AR and N3431-5002RB offer ROHS3 compliance. 65823-213LF provides RoHS compliance with REACH affected status. 65823-031LF, 65823-033LF, 65823-079LF, 65823-081LF, and 65823-083LF offer RoHS compliance with REACH affected status. Compliance requirements vary by application and regulatory jurisdiction.

Q: What contact post length options are available?

A: Contact post lengths range from 0.105" (2.67mm) to 0.675" (17.15mm). The original 3431-1003 uses 0.155" (3.94mm). D3431-5002-AR and N3431-5002RB use 0.112" (2.84mm). Amphenol ICC variants offer 0.105", 0.150", or 0.675" options. Post length selection depends on PCB thickness and application requirements.

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