TE Connectivity AMP Connectors 3-644763-8 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 3-644763-8 is a rectangular connector header designed for through-hole mounting applications. This connector features an 8-position, single-row configuration with a 0.156" (3.96mm) pitch and is classified as obsolete. The part operates across a temperature range of -55°C to 105°C and is rated for 600VAC applications. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure ongoing component availability for production and maintenance applications.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.156" (3.96mm)
Number of Positions	8
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Shrouding	Unshrouded
Operating Temperature	-55°C ~ 105°C
Voltage Rating	600VAC
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 3-644763-8 is determined by strict alignment of the following critical parameters:

Primary Matching Criteria:

Connector type: Header
Contact type: Male Pin
Pitch - mating: 0.156" (3.96mm)
Number of positions: 8
Number of rows: 1
Mounting type: Through Hole
Termination: Solder
Shrouding: Unshrouded

Secondary Compatibility Factors:

Operating temperature range: -55°C ~ 105°C
Material flammability rating: UL94 V-0
RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)

All three substitute parts listed meet these core electrical and mechanical parameters. Variations in contact length, contact material, contact finish, and insulation material do not preclude substitution when the primary mating interface parameters remain constant. The substitute parts are sourced from active manufacturers (Molex and Samtec Inc.), ensuring ongoing availability and support.

Parameter Comparison

Parameter	TE Connectivity 3-644763-8	Molex 0026202081	Samtec FWJ-08-01-T-S	Samtec HFWJ-08-02-TM-S
Manufacturer	TE Connectivity AMP Connectors	Molex	Samtec Inc.	Samtec Inc.
Product Status	Obsolete	Active	Active	Active
Connector Type	Header	Header	Header	Header
Contact Type	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)
Number of Positions	8	8	8	8
Number of Rows	1	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Contact Length - Mating	0.400" (10.16mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.500" (12.70mm)
Contact Length - Post	0.175" (4.45mm)	0.175" (4.45mm)	0.175" (4.45mm)	0.175" (4.45mm)
Overall Contact Length	0.700" (17.78mm)	0.750" (19.05mm)	0.750" (19.05mm)	0.800" (20.32mm)
Insulation Height	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)
Operating Temperature	-55°C ~ 105°C	Not specified	-55°C ~ 105°C	-55°C ~ 105°C
Voltage Rating	600VAC	Not specified	600VAC, 845VDC	Not specified
Material Flammability Rating	UL94 V-0	UL94 V-2	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not specified

Engineering Selection Recommendations

Molex 0026202081: This substitute part is sourced from an active manufacturer and maintains ROHS3 compliance with MSL 1 rating. The connector meets all primary mating interface parameters. The material flammability rating is UL94 V-2, which is lower than the original UL94 V-0 specification. This part is suitable for applications where the reduced flammability rating is acceptable. Current inventory status is 1574 units.

Samtec FWJ-08-01-T-S: This substitute part is sourced from an active manufacturer and maintains full compliance with ROHS3 standards and MSL 1 rating. The connector meets all primary mating interface parameters and maintains the UL94 V-0 flammability rating. Operating temperature range and voltage rating specifications match the original part. This part is suitable for direct substitution in applications requiring equivalent electrical and thermal performance. Current inventory status is 930 units.

Samtec HFWJ-08-02-TM-S: This substitute part is sourced from an active manufacturer and maintains ROHS3 compliance. The connector meets all primary mating interface parameters and maintains the UL94 V-0 flammability rating. Operating temperature range matches the original specification. This part includes a current rating specification of 6.7A per contact. The extended contact length (0.500" mating length) may require verification for mechanical clearance in existing designs. Current inventory status is 982 units.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0026202081 be used as a direct replacement for the TE Connectivity 3-644763-8?

A: The Molex 0026202081 meets all primary mating interface parameters including pitch, position count, mounting type, and termination method. However, the material flammability rating differs (UL94 V-2 versus UL94 V-0). Substitution is permissible when the application does not require UL94 V-0 compliance. Verify flammability requirements for your specific application before selection.

Q: What are the key differences between the two Samtec substitute parts?

A: Both Samtec parts (FWJ-08-01-T-S and HFWJ-08-02-TM-S) maintain UL94 V-0 flammability rating and operating temperature range matching the original part. The primary difference is contact length: FWJ-08-01-T-S has a 0.450" mating contact length, while HFWJ-08-02-TM-S has a 0.500" mating contact length. The HFWJ series includes a specified current rating of 6.7A per contact. Verify mechanical clearance requirements when selecting between these options.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all three substitute parts are ROHS3 compliant, matching the original TE Connectivity part specification.

Q: What is the significance of the contact length variations?

A: Contact length variations affect the mating depth and mechanical engagement with corresponding receptacle connectors. The original TE Connectivity part has a 0.400" mating contact length, while substitute parts range from 0.450" to 0.500". Verify that existing receptacle connectors or mating components accommodate the longer contact lengths of substitute parts to ensure proper electrical contact and mechanical stability.

Q: Which substitute part is recommended for high-temperature applications?

A: All three substitute parts support the -55°C to 105°C operating temperature range. The Samtec HFWJ-08-02-TM-S is designated as a high-temperature power terminal and includes a specified current rating, making it suitable for applications requiring sustained current delivery across the full temperature range.

Q: Are there any packaging differences between the substitute parts?

A: All substitute parts are supplied in bulk packaging. Inventory availability differs: Molex 0026202081 has 1574 units in stock, Samtec FWJ-08-01-T-S has 930 units, and Samtec HFWJ-08-02-TM-S has 982 units.

Q: Can the substitute parts be used interchangeably in the same application?

A: Interchangeability depends on specific application requirements. All parts meet core mating interface parameters. Verify flammability rating requirements (UL94 V-0 versus V-2), contact length compatibility with existing receptacles, and current rating specifications before selecting between options.

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