TE Connectivity 3-644632-2 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3-644632-2 is a rectangular connector header, vertical orientation, 2-position configuration with 0.156" (3.96mm) pitch designed for through-hole mounting. This connector is part of the MTA-156 series and features shrouded design with friction lock fastening. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing production and maintenance applications. Substitute parts maintain core electrical and mechanical compatibility while offering active product status and extended availability.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.156" (3.96mm)
Number of Positions	2
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Shrouding	Shrouded - 1 Wall
Fastening Type	Friction Lock
Contact Length - Mating	0.450" (11.43mm)
Material Flammability Rating	UL94 V-0
Operating Temperature	-55°C ~ 105°C
Voltage Rating	600VAC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TE Connectivity 3-644632-2 are selected based on strict electrical and mechanical parameter alignment. The following core parameters determine substitution eligibility:

Critical Matching Parameters:

Connector Type: Header
Contact Type: Male Pin
Pitch - Mating: 0.156" (3.96mm)
Number of Positions: 2
Number of Rows: 1
Mounting Type: Through Hole
Termination: Solder
Shrouding: Shrouded - 1 Wall
Fastening Type: Friction Lock
Contact Length - Mating: 0.450" (11.43mm)
Material Flammability Rating: UL94 V-0

Variable Parameters Allowing Substitution:

Contact Finish - Mating: Gold or Tin
Contact Length - Post: 0.125" to 0.241" (3.18mm to 6.12mm)
Insulation Material: Thermoplastic Glass Filled or Polyester Glass Filled
Features: Board Guide or Board Lock
Manufacturer: TE Connectivity or Molex

All substitute parts listed maintain active product status and full RoHS3 compliance with MSL 1 rating, ensuring regulatory and environmental compatibility with the original component.

Parameter Comparison

Parameter	3-644632-2 (TE)	0026604020 (Molex)	0026604022 (Molex)	0026604023 (Molex)	0026606020 (Molex)	0026606021 (Molex)	0026606022 (Molex)	0026614020 (Molex)	0026644020 (Molex)	0026654020 (Molex)
Connector Type	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
Pitch - Mating	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)	0.156" (3.96mm)
Number of Positions	2	2	2	2	2	2	2	2	2	2
Number of Rows	1	1	1	1	1	1	1	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall	Shrouded - 1 Wall
Fastening Type	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock	Friction Lock
Contact Length - Mating	0.450" (11.43mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.449" (11.40mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.450" (11.43mm)
Contact Length - Post	0.125" (3.18mm)	0.140" (3.56mm)	0.140" (3.56mm)	0.170" (4.32mm)	0.140" (3.56mm)	0.241" (6.12mm)	0.140" (3.56mm)	0.140" (3.56mm)	0.140" (3.56mm)	0.140" (3.56mm)
Overall Contact Length	0.700" (17.78mm)	0.720" (18.29mm)	0.720" (18.29mm)	0.750" (19.05mm)	0.720" (18.29mm)	0.820" (20.83mm)	0.720" (18.29mm)	0.720" (18.29mm)	0.720" (18.29mm)	0.720" (18.29mm)
Insulation Height	0.545" (13.84mm)	0.446" (11.33mm)	0.446" (11.33mm)	0.446" (11.33mm)	0.446" (11.33mm)	0.446" (11.33mm)	0.446" (11.33mm)	0.446" (11.33mm)	0.446" (11.33mm)	0.446" (11.33mm)
Contact Shape	Circular	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Tin	Tin	Tin	Tin	Tin	Gold	Gold	Tin	Gold
Contact Finish - Post	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin
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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed Molex substitute parts maintain full compatibility with the TE Connectivity 3-644632-2 across critical electrical and mechanical parameters. Selection among substitute options is determined by specific application requirements:

For Direct Replacement with Minimal Design Changes: Molex 0026604020, 0026604022, or 0026606020 provide the closest mechanical compatibility with standard post lengths (0.140" to 0.170") and are recommended for applications where PCB layout remains unchanged.

For Applications Requiring Extended Post Length: Molex 0026606021 offers extended post length (0.241") suitable for applications with thicker PCB assemblies or additional stacking requirements.

For Contact Finish Specifications:

Gold-plated mating contacts: Molex 0026606022, 0026614020, or 0026654020
Tin-plated mating contacts: Molex 0026604020, 0026604022, 0026604023, 0026606020, 0026606021, or 0026644020

For Board Mounting Features:

Board Lock feature: Molex 0026606020, 0026606021, 0026606022, or 0026654020
Board Guide feature: Molex 0026644020 or 0026654020

All substitute parts carry active product status, ensuring long-term availability and supply chain continuity. All components maintain ROHS3 compliance and MSL 1 rating, meeting current regulatory and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can Molex rectangular connectors with 0.156" pitch directly replace the TE Connectivity 3-644632-2?

A: Yes. All listed Molex substitute parts maintain identical pitch spacing (0.156"), connector type (header), contact type (male pin), mounting method (through hole), and fastening mechanism (friction lock). These core parameters ensure mechanical and electrical compatibility for direct substitution.

Q: What is the significance of contact post length variations among substitute parts?

A: Contact post length determines the depth of solder joint penetration into the PCB. The original TE part specifies 0.125" post length, while Molex substitutes range from 0.140" to 0.241". Longer posts provide greater solder joint strength and accommodate thicker PCB assemblies. Selection depends on PCB thickness and soldering process specifications.

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

A: Yes. The original TE Connectivity 3-644632-2 features gold-plated mating contacts (30.0µin thickness). Molex substitutes offer both tin-plated and gold-plated options. Gold plating provides superior corrosion resistance and contact reliability in harsh environments. Tin plating is suitable for general industrial applications with lower cost.

Q: What is the difference between Board Guide and Board Lock features?

A: Board Guide provides mechanical alignment during assembly without positive locking. Board Lock provides positive mechanical retention of the connector to the PCB, preventing accidental disconnection. Selection depends on application requirements for connector retention and assembly handling.

Q: Do all substitute parts meet the same regulatory and environmental standards as the original?

A: Yes. All listed Molex substitute parts are ROHS3 compliant, carry UL94 V-0 flammability rating, and maintain MSL 1 moisture sensitivity level. These specifications match the original TE Connectivity component, ensuring compliance with current environmental and safety regulations.

Q: Why is the original TE Connectivity 3-644632-2 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active substitute parts from Molex provide equivalent functionality with ongoing manufacturing support, ensuring availability for new designs and maintenance applications.

Q: Can insulation material differences between thermoplastic and polyester affect performance?

A: Both thermoplastic glass-filled and polyester glass-filled materials meet UL94 V-0 flammability requirements and maintain equivalent electrical performance across the specified operating temperature range (-55°C to 105°C). Material selection does not affect connector functionality for standard industrial applications.

Q: What inventory considerations should guide substitute part selection?

A: Molex 0026644020 maintains the highest inventory level (60,760 units), followed by 0026614020 (41,914 units). For applications requiring immediate availability, these parts offer superior supply chain assurance. Other substitutes maintain adequate inventory (665 to 1,146 units) for standard procurement timelines.

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