TE Connectivity AMP Connectors 643431-2 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 643431-2 is a rectangular connector header designed for through-hole mounting applications. This connector features a 4-position, single-row configuration with 0.100" (2.54mm) pitch spacing and is classified as part of the MTA-100 series. The part is currently listed as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility for board-to-cable/wire interconnection applications.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	4
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Friction Lock
Shrouding	Shrouded - 1 Wall
Contact Shape	Square
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 643431-2 is determined by the following critical parameters:

Primary Matching Criteria:

Connector type: Header
Contact type: Male Pin
Pitch spacing: 0.100" (2.54mm)
Number of positions: 4
Number of rows: 1
Mounting type: Through Hole
Termination method: Solder
Fastening type: Friction Lock
Shrouding configuration: Shrouded - 1 Wall
Contact shape: Square
Material flammability rating: UL94 V-0

Secondary Compatibility Factors:

Contact length dimensions (mating and post)
Insulation height
Operating temperature range
Contact material composition
Insulation material type
RoHS compliance status

The substitute parts listed below maintain compatibility across all primary matching criteria. Variations in secondary factors such as contact finish material, contact finish thickness, and specific post length are acceptable within the scope of functional equivalence for general-purpose applications.

Parameter Comparison

Parameter	643431-2 (TE Connectivity)	0470531000 (Molex)	LCW-104-08-G-M-300 (Samtec)	LCW-104-08-S-S-300-02 (Samtec)	LCW-104-08-T-S-300-LL (Samtec)	LCW-104-15-G-S-300 (Samtec)	LCW-104-15-T-S-300 (Samtec)
Manufacturer	TE Connectivity	Molex	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Connector Type	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
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)
Number of Positions	4	4	4	4	4	4	4
Number of Rows	1	1	1	1	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Kinked Pin, Solder	Solder	Solder
Fastening Type	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock
Shrouding	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall
Contact Shape	Square	Square	Square	Square	Square	Square	Square
Contact Length - Mating	0.295" (7.49mm)	0.295" (7.49mm)	0.300" (7.62mm)	0.300" (7.62mm)	0.300" (7.62mm)	0.300" (7.62mm)	0.300" (7.62mm)
Contact Length - Post	0.140" (3.56mm)	0.138" (3.50mm)	0.130" (3.30mm)	0.130" (3.30mm)	0.130" (3.30mm)	0.230" (5.84mm)	0.230" (5.84mm)
Overall Contact Length	0.535" (13.59mm)	0.531" (13.50mm)	0.530" (13.46mm)	0.530" (13.46mm)	0.530" (13.46mm)	0.630" (16.00mm)	0.630" (16.00mm)
Insulation Height	0.305" (7.75mm)	0.295" (7.50mm)	0.310" (7.87mm)	0.310" (7.87mm)	0.310" (7.87mm)	0.310" (7.87mm)	0.310" (7.87mm)
Contact Material	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Thermoplastic	Polyamide (PA), Nylon	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)
Contact Finish - Mating	Tin	Tin	Gold	Gold	Tin	Gold	Tin
Contact Finish - Post	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Operating Temperature	-55°C ~ 105°C	Not Specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 105°C
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 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified
Number of Positions Loaded	3	All	All	3	All	All	All

Engineering Selection Recommendations

Primary Recommendation: Molex 0470531000

The Molex 0470531000 represents the most direct functional equivalent to the TE Connectivity 643431-2. This part maintains active product status and achieves ROHS3 compliance, providing long-term supply chain stability. The connector shares identical pitch spacing, position count, mounting configuration, and fastening mechanism. Contact length dimensions are within 0.007" (0.18mm) of the original specification. The part is available in high inventory quantity (21,815 pieces), supporting immediate procurement requirements.

Secondary Recommendations: Samtec LCW Series

The Samtec LCW series connectors (LCW-104-08-G-M-300, LCW-104-08-S-S-300-02, LCW-104-08-T-S-300-LL, LCW-104-15-G-S-300, LCW-104-15-T-S-300) provide alternative solutions with active product status and ROHS3 compliance. These parts maintain all primary matching criteria and are suitable for applications where the original part is unavailable.

Samtec LCW-104-08 Series (Standard Post Length):

LCW-104-08-G-M-300: Gold-plated mating contacts, extended operating temperature range (-55°C to 125°C)
LCW-104-08-S-S-300-02: Gold-plated mating contacts, matches original 3-position loaded configuration
LCW-104-08-T-S-300-LL: Tin-plated mating contacts with kinked pin termination, operating temperature range matches original specification (-55°C to 105°C)

Samtec LCW-104-15 Series (Extended Post Length):

LCW-104-15-G-S-300: Gold-plated mating contacts, extended post length (0.230"), extended operating temperature range (-55°C to 125°C)
LCW-104-15-T-S-300: Tin-plated mating contacts, extended post length (0.230"), operating temperature range matches original specification (-55°C to 105°C)

All substitute parts satisfy UL94 V-0 flammability requirements and maintain friction lock fastening compatibility. Selection between standard and extended post length variants depends on specific PCB thickness and application requirements.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0470531000 directly replace the TE Connectivity 643431-2 in existing designs?

A: Yes. The Molex 0470531000 maintains identical pitch spacing (0.100"), position count (4), row configuration (1), mounting type (through hole), termination method (solder), and fastening mechanism (friction lock). Contact length dimensions vary by less than 0.007" (0.18mm), which is within acceptable tolerance for standard PCB applications. The connector is mechanically and electrically compatible with mating components designed for the original part.

Q: What is the difference between the Samtec LCW-104-08 and LCW-104-15 series?

A: The primary difference is contact post length. The LCW-104-08 series features a 0.130" (3.30mm) post length, comparable to the original specification. The LCW-104-15 series provides an extended 0.230" (5.84mm) post length, suitable for applications requiring deeper PCB penetration or thicker board assemblies. Both series maintain identical mating contact length and pitch spacing.

Q: Are there differences in contact finish between substitute parts?

A: Yes. The original TE Connectivity 643431-2 features tin-plated mating contacts. Samtec LCW variants offer both tin-plated and gold-plated options. Gold-plated contacts (LCW-104-08-G-M-300, LCW-104-08-S-S-300-02, LCW-104-15-G-S-300) provide enhanced corrosion resistance and are suitable for high-reliability applications. Tin-plated variants (LCW-104-08-T-S-300-LL, LCW-104-15-T-S-300) maintain cost efficiency for general-purpose applications.

Q: Does the number of positions loaded affect compatibility?

A: The original TE Connectivity 643431-2 is loaded with 3 positions. The Molex 0470531000 and most Samtec variants are fully loaded (all 4 positions). This difference does not affect mechanical or electrical compatibility. Fully loaded connectors provide additional contact availability without compromising existing circuit functionality.

Q: What is the significance of the operating temperature range differences?

A: The original part operates from -55°C to 105°C. Samtec LCW-104-08 and LCW-104-15 variants with gold-plated contacts extend the upper limit to 125°C, providing broader thermal operating margin. Samtec variants with tin-plated contacts maintain the -55°C to 105°C range, matching the original specification. Selection depends on application thermal requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original TE Connectivity 643431-2 is RoHS Compliant. All substitute parts listed (Molex 0470531000 and Samtec LCW series) achieve ROHS3 compliance, meeting current regulatory requirements for lead-free manufacturing and hazardous substance restrictions.

Q: What is the difference between kinked pin and standard solder termination?

A: The Samtec LCW-104-08-T-S-300-LL features kinked pin termination in addition to solder termination. This configuration provides mechanical retention during PCB assembly, reducing the risk of pin displacement during soldering operations. Standard solder termination relies solely on solder joint integrity. Both methods are functionally equivalent for final assembly.

Q: Can I use substitute parts with existing mating connectors designed for the TE Connectivity 643431-2?

A: Yes. All substitute parts maintain identical pitch spacing (0.100"), contact shape (square), and shrouding configuration (shrouded - 1 wall). Mating connectors designed for the original part are mechanically and electrically compatible with all listed substitutes.

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