TE Connectivity 644759-4 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644759-4 is a vertical rectangular connector header designed for through-hole mounting in board-to-cable/wire applications. This component is a 4-position connector with 0.156" (3.96mm) pitch spacing, part of the MTA-156 series. The connector features shrouded design with friction lock fastening and gold-plated mating contacts.

The 644759-4 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production and maintenance requirements for systems utilizing this connector type.

Substiute Parts

644759-4

TE Connectivity AMP ConnectorsIn Stock: 820644759-4 Datasheet

Current PartRFQ

3-644759-4

TE Connectivity AMP ConnectorsIn Stock: 11333-644759-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 644759-4 is determined by strict equivalence across the following critical parameters:

• Connector Type & Contact Configuration: Header with male pin contacts
• Position Count & Pitch: 4 positions at 0.156" (3.96mm) mating pitch
• Mounting & Termination: Through-hole solder termination
• Shrouding Design: Shrouded with 1 wall configuration
• Electrical Ratings: 600VAC voltage rating and -55°C to 105°C operating temperature range
• Material Standards: UL94 V-0 flammability rating and thermoplastic glass-filled insulation
• Contact Materials & Finishes: Copper alloy base with gold-plated mating contacts

The substitute part 3-644759-4 maintains full electrical and mechanical compatibility with the original 644759-4 across all specified parameters. The primary distinction is product status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The 3-644759-4 is the direct substitute for the obsolete 644759-4. Both components share identical electrical and mechanical specifications across all critical parameters, including connector geometry, contact configuration, voltage and temperature ratings, and material standards.

The primary distinction between these parts is product status and regulatory compliance. The 644759-4 is classified as obsolete and carries RoHS non-compliant status. The 3-644759-4 is an active product with RoHS compliant certification, indicating compliance with the Restriction of Hazardous Substances Directive. Additionally, the 3-644759-4 carries REACH Unaffected status, whereas the 644759-4 shows Vendor Undefined REACH status.

A secondary difference exists in the contact finish of the post termination: the 644759-4 uses Tin-Lead finish, while the 3-644759-4 uses Tin finish. This distinction reflects the RoHS compliance transition, as lead-free soldering is a requirement of RoHS regulations.

For new designs, production continuity, and systems requiring regulatory compliance documentation, the 3-644759-4 is the appropriate selection. The 3-644759-4 maintains full functional and mechanical interchangeability with the 644759-4 in all board-to-cable/wire applications within the specified electrical and temperature operating ranges.

Frequently Asked Questions (FAQ)

Q: Are the 644759-4 and 3-644759-4 mechanically interchangeable?

A: Yes. Both connectors share identical mechanical dimensions, including mating pitch (0.156"), contact lengths, insulation height, and shrouding configuration. They are directly interchangeable in through-hole mounting applications.

Q: What is the significance of the RoHS compliance difference?

A: The 644759-4 is RoHS non-compliant, while the 3-644759-4 is RoHS compliant. RoHS compliance indicates the absence of restricted hazardous substances including lead, cadmium, mercury, and certain brominated flame retardants. For applications subject to RoHS regulations or customer requirements, the 3-644759-4 is the appropriate selection.

Q: Why does the contact finish differ between these parts?

A: The 644759-4 uses Tin-Lead finish on the post termination, while the 3-644759-4 uses Tin finish. This reflects the transition to lead-free manufacturing required by RoHS compliance. Both finishes provide equivalent solderability and electrical performance in standard PCB assembly processes.

Q: Can the 644759-4 be used in new designs?

A: The 644759-4 is classified as obsolete. For new designs, the 3-644759-4 is the recommended selection, as it is an active product with current manufacturing support and regulatory compliance documentation.

Q: Are there packaging differences between these parts?

A: The 644759-4 packaging specification is not provided in the available data. The 3-644759-4 is supplied in bulk packaging. Confirm packaging requirements with the supplier for specific application needs.

Q: What is the electrical rating for these connectors?

A: Both connectors are rated for 600VAC operation and support current ratings that vary by wire gauge. Operating temperature range is -55°C to 105°C for both parts. Consult wire gauge specifications and application requirements to determine maximum current capacity.

Q: Are these connectors suitable for industrial applications?

A: Yes. Both the 644759-4 and 3-644759-4 are specified for general purpose and industrial applications. The UL94 V-0 flammability rating and thermoplastic glass-filled insulation material support industrial environmental requirements.