TE Connectivity 644759-8 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644759-8 is a vertical rectangular connector header designed for through-hole mounting in board-to-cable/wire applications. This 8-position connector operates within the MTA-156 series and features shrouded single-wall construction with friction lock fastening. The part is classified as obsolete, necessitating identification of active equivalent components for ongoing procurement and design requirements. Substitute parts maintain identical electrical and mechanical specifications while offering improved product status and compliance certifications.

Substiute Parts

644759-8

TE Connectivity AMP ConnectorsIn Stock: 865644759-8 Datasheet

Current PartRFQ

3-644759-8

TE Connectivity AMP ConnectorsIn Stock: 11253-644759-8 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for rectangular connector headers is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Parameters:

• Pitch - Mating: 0.156" (3.96mm)
• Number of Positions: 8
• Voltage Rating: 600VAC
• Operating Temperature Range: -55°C ~ 105°C

Mechanical Compatibility Parameters:

• Connector Type: Header
• Contact Type: Male Pin
• Mounting Type: Through Hole
• Shrouding Configuration: Shrouded - 1 Wall
• Termination Method: Solder
• Fastening Type: Friction Lock

Material & Construction Parameters:

• Contact Material: Copper Alloy
• Insulation Material: Thermoplastic, Glass Filled
• Material Flammability Rating: UL94 V-0
• Contact Shape: Square

The substitute part 3-644759-8 maintains complete equivalence across all electrical, mechanical, and material specifications. Differences in product status and compliance certifications do not affect functional interchangeability in applications requiring MTA-156 series 8-position headers with 0.156" pitch and through-hole mounting.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 3-644759-8 is the direct equivalent for the obsolete 644759-8 connector header. Selection of the substitute part is based on the following engineering criteria:

Product Status: The main part 644759-8 carries obsolete status, limiting long-term procurement viability. The substitute 3-644759-8 maintains active product status, ensuring continued availability and supply chain reliability.

Compliance Certifications: The substitute part 3-644759-8 is RoHS Compliant and carries REACH Unaffected status, whereas the main part is RoHS non-compliant with undefined REACH status. For applications subject to environmental regulations or customer compliance requirements, the substitute part satisfies regulatory obligations.

Functional Equivalence: All electrical and mechanical parameters are identical between the main part and substitute. The contact finish on the post differs only in composition (Tin versus Tin-Lead), which does not affect functional performance in solder termination applications.

Packaging Availability: The substitute part is available in bulk packaging, supporting production requirements and inventory management.

For new designs and ongoing procurement, the substitute part 3-644759-8 is the appropriate selection. For legacy systems currently using 644759-8, direct substitution with 3-644759-8 is functionally and mechanically compatible without design modification.

Frequently Asked Questions (FAQ)

Q: Are the 644759-8 and 3-644759-8 connectors mechanically interchangeable?

A: Yes. Both connectors share identical mechanical specifications including 8-position configuration, 0.156" (3.96mm) pitch, through-hole mounting, shrouded single-wall construction, and all contact dimensions. Direct substitution is possible without PCB or cable assembly modification.

Q: What is the difference between the Tin-Lead and Tin contact finishes on the post?

A: The main part uses Tin-Lead finish while the substitute uses Tin finish on the post contact. Both finishes are suitable for solder termination and provide equivalent electrical performance. The Tin finish in the substitute part aligns with modern lead-free manufacturing practices.

Q: Why is the main part 644759-8 listed as obsolete?

A: Obsolete status indicates the part is no longer in active production. The substitute part 3-644759-8 is the active equivalent and is the recommended selection for new procurement.

Q: Does the RoHS compliance difference affect compatibility?

A: RoHS compliance affects regulatory and environmental requirements, not functional compatibility. The substitute part 3-644759-8 is RoHS Compliant, making it suitable for applications subject to RoHS directives. Both parts are functionally equivalent in electrical and mechanical performance.

Q: Can I use the substitute part in existing designs without modification?

A: Yes. The substitute part 3-644759-8 maintains complete electrical and mechanical equivalence with 644759-8. No design changes are required for direct substitution in existing applications.

Q: What is the voltage and temperature rating for both parts?

A: Both the main part and substitute are rated for 600VAC operation across an operating temperature range of -55°C to 105°C. These specifications are identical.

Q: Are there any differences in the number of positions or pitch between the two parts?

A: No. Both connectors feature 8 positions with a 0.156" (3.96mm) mating pitch. These critical parameters are identical.

Q: What packaging options are available for the substitute part?

A: The substitute part 3-644759-8 is available in bulk packaging. The main part packaging specification was not provided.