TE Connectivity 641126-4 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 641126-4 is a rectangular connector header for through-hole mounting, featuring 4 positions at 0.100" (2.54mm) pitch. This connector is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design and procurement requirements. The part operates within the MTA-100 series and is designed for board-to-cable/wire applications with friction lock fastening and solder termination.

Key Parameters

Parameter	Specification
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	4
Number of Rows	1
Shrouding	Shrouded - 1 Wall
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Friction Lock
Contact Shape	Square
Material Flammability Rating	UL94 V-0
Operating Temperature	-55°C ~ 105°C
Voltage Rating	250VAC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 641126-4 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

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

Direct Equivalent: The part 3-641126-4 is a direct equivalent from TE Connectivity AMP Connectors, differing only in packaging (Bulk) and product status (Active vs. Obsolete). All electrical and mechanical parameters are identical.

Cross-Manufacturer Substitutes: Parts from Molex (0470531000) and Samtec Inc. (LCW series) meet the core substitution criteria of pitch, position count, connector type, and mounting configuration. These parts maintain compatibility with the original application requirements while offering active product status and alternative sourcing options.

Partial Compatibility Substitutes: Certain Samtec LCW variants (LCW-104-08-S-S-300-02) differ in number of positions loaded (3 vs. All) or contact post length, requiring application-specific validation before selection.

Parameter Comparison

Parameter	641126-4	3-641126-4	0470531000	LCW-104-08-G-M-300	LCW-104-08-S-S-300-02	LCW-104-15-G-S-300
Manufacturer	TE Connectivity	TE Connectivity	Molex	Samtec Inc.	Samtec Inc.	Samtec Inc.
Product Status	Obsolete	Active	Active	Active	Active	Active
Connector Type	Header	Header	Header	Header	Header	Header
Contact Type	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)
Number of Positions	4	4	4	4	4	4
Number of Rows	1	1	1	1	1	1
Shrouding	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock
Contact Shape	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Tin	Gold	Gold	Gold
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Thermoplastic	Thermoplastic	Polyamide (PA), Nylon	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	Not Specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Specified	Not Specified	Not Specified
Contact Length - Post	0.140" (3.56mm)	0.140" (3.56mm)	0.138" (3.50mm)	0.130" (3.30mm)	0.130" (3.30mm)	0.230" (5.84mm)
Insulation Height	0.305" (7.75mm)	0.305" (7.75mm)	0.295" (7.50mm)	0.310" (7.87mm)	0.310" (7.87mm)	0.310" (7.87mm)
Number of Positions Loaded	All	All	All	All	3	All

Engineering Selection Recommendations

Primary Recommendation: 3-641126-4

The part 3-641126-4 from TE Connectivity AMP Connectors is the direct equivalent replacement for the obsolete 641126-4. This part maintains identical electrical and mechanical specifications while offering active product status. The only difference is packaging format (Bulk). This part is suitable for direct substitution without design modification.

Secondary Recommendation: 0470531000 (Molex)

The Molex 0470531000 provides cross-manufacturer compatibility with all critical substitution parameters aligned. This part is ROHS3 compliant and maintains the required connector configuration. Minor variations exist in contact finish (Tin vs. Gold mating surface) and insulation material (Polyamide vs. Thermoplastic). This part is suitable for applications where cross-manufacturer sourcing is acceptable.

Tertiary Recommendations: Samtec LCW Series

The Samtec LCW-104-08-G-M-300 and LCW-104-15-G-S-300 offer extended operating temperature range (-55°C ~ 125°C) compared to the original specification (-55°C ~ 105°C). These parts are ROHS3 compliant and maintain all core substitution criteria. The primary distinction is contact post length, which affects board-level stack height. LCW-104-08-G-M-300 provides comparable post length (0.130" vs. 0.140"), while LCW-104-15-G-S-300 provides extended post length (0.230") for applications requiring increased standoff distance.

Not Recommended: LCW-104-08-S-S-300-02

This part differs in number of positions loaded (3 vs. All), making it unsuitable for direct substitution in applications requiring all 4 positions to be populated.

Frequently Asked Questions (FAQ)

Q: Can 3-641126-4 be used as a direct replacement for 641126-4?

A: Yes. The 3-641126-4 is a direct equivalent with identical electrical and mechanical specifications. The only difference is packaging format (Bulk vs. standard packaging). No design modification is required.

Q: What are the key differences between the TE Connectivity and Molex options?

A: The primary differences are contact finish (Gold vs. Tin on mating surface), insulation material (Thermoplastic vs. Polyamide), and contact material (Copper Alloy vs. Phosphor Bronze). All critical parameters including pitch, position count, mounting type, and fastening mechanism are identical. Operating temperature is not specified for the Molex part.

Q: Are Samtec LCW parts fully compatible with the original 641126-4?

A: Samtec LCW parts meet all core substitution criteria (pitch, position count, connector type, mounting configuration, fastening type). However, they differ in contact post length and insulation material. LCW-104-08-G-M-300 provides the closest post length match (0.130" vs. 0.140"). Extended operating temperature range (-55°C ~ 125°C) is an additional benefit. Application-specific validation is required to confirm compatibility with existing board layouts and mating connectors.

Q: What is the significance of contact post length differences?

A: Contact post length determines the board-level stack height when the connector is mounted. The original 641126-4 has a post length of 0.140" (3.56mm). Samtec LCW-104-08 variants have 0.130" (3.30mm) posts, resulting in approximately 0.010" less standoff. LCW-104-15 variants have 0.230" (5.84mm) posts, providing significantly increased standoff. These differences affect PCB layout and mating connector clearance.

Q: Why does LCW-104-08-S-S-300-02 show only 3 positions loaded?

A: This part variant is manufactured with only 3 contact positions populated instead of all 4. This configuration is not suitable for applications requiring all 4 positions to be functional. Alternative Samtec LCW variants with all positions loaded should be selected.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (3-641126-4, 0470531000, and all Samtec LCW variants) are ROHS3 compliant, matching the compliance status of the original 641126-4.

Q: What is the difference between contact finish specifications?

A: The original 641126-4 features gold-plated mating contacts (15.0µin thickness) with tin-plated posts. The Molex 0470531000 uses tin finish on mating contacts (100.0µin thickness). Samtec LCW variants use either gold (10.0µin or 30.0µin thickness) or tin on mating contacts depending on part number. Contact finish affects corrosion resistance and mating force characteristics.

Q: Can these parts be used interchangeably in existing designs?

A: Direct interchange is possible for 3-641126-4 without any design changes. For Molex and Samtec alternatives, physical validation is required to confirm compatibility with existing mating connectors, PCB layouts, and mechanical constraints. Contact post length and insulation height variations may affect board-level clearances.

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