TE Connectivity 644371-3 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644371-3 is a 3-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 22 AWG discrete or ribbon cable. This connector features tin-lead contact finish and is classified as free-hanging, in-line mounting with locking ramp fastening. The part is currently active in production with 993 pieces in stock inventory.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across connector specifications. Alternative part numbers may be required due to packaging availability, compliance status differences, or inventory considerations while preserving functional compatibility in the application circuit.

Substiute Parts

644371-3

TE Connectivity AMP ConnectorsIn Stock: 1005644371-3 Datasheet

Current PartRFQ

3-644371-3

TE Connectivity AMP ConnectorsIn Stock: 14613-644371-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 644371-3 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Parameters:

• Connector type (Receptacle)
• Number of positions (3)
• Contact type (Female Socket)
• Pitch specification (0.156" / 3.96mm)
• Cable termination method (IDC)
• Wire gauge rating (22 AWG)
• Contact finish thickness (80.0µin / 2.03µm)

Mechanical Compatibility Parameters:

• Mounting type (Free Hanging, In-Line)
• Fastening type (Locking Ramp)
• Number of rows (1)
• Features (Closed End)
• Color (Black)

Series Designation:

• MTA-156 series classification

The substitute part 3-644371-3 maintains all electrical and mechanical parameters identical to the main part. Differences exist only in contact finish material composition (tin versus tin-lead) and compliance certifications, with no impact on connector form, fit, or functional interface.

Parameter Comparison

Engineering Selection Recommendations

Part 644371-3 Selection Criteria: The original part number 644371-3 is appropriate for applications where tin-lead contact finish is specified or required by design documentation. This part maintains RoHS non-compliant status and is suitable for legacy systems or applications without RoHS compliance mandates. Current inventory of 993 pieces supports immediate availability for production requirements.

Part 3-644371-3 Selection Criteria: The substitute part 3-644371-3 is appropriate for applications requiring RoHS compliance certification. This part maintains identical electrical and mechanical interface specifications while providing tin contact finish instead of tin-lead. The higher inventory level of 1400 pieces provides extended availability. Selection of this part is driven by regulatory compliance requirements rather than functional differences.

Compliance Considerations: Both parts are classified as Active products from TE Connectivity. The primary distinction between parts is RoHS compliance status and contact finish material. Applications subject to RoHS directives or customer compliance requirements must specify part 3-644371-3. Applications without such requirements may use either part based on inventory and delivery considerations.

Frequently Asked Questions (FAQ)

Q: Are these connectors mechanically interchangeable?

A: Yes. Both the 644371-3 and 3-644371-3 maintain identical mechanical specifications including pitch (0.156"), mounting type (free-hanging in-line), fastening type (locking ramp), and connector body dimensions. Physical installation and mating with corresponding plug connectors is identical between parts.

Q: What is the functional difference between tin-lead and tin contact finishes?

A: Contact finish material does not alter the electrical interface or mechanical fit of the connector. Both tin-lead and tin finishes provide equivalent contact resistance and signal integrity at the specified 22 AWG wire gauge. Selection between finishes is determined by compliance requirements and design specifications rather than performance differences.

Q: Which part should be selected for RoHS-compliant applications?

A: Part 3-644371-3 carries RoHS Compliant certification and is the required selection for applications subject to RoHS directives. Part 644371-3 is RoHS non-compliant and is not suitable for RoHS-regulated applications.

Q: Can these connectors be used with both discrete and ribbon cable?

A: Yes. Both parts support discrete or ribbon cable termination via IDC (Insulation Displacement Contact) method at 22 AWG wire gauge. The connector design accommodates both cable types without modification.

Q: What is the significance of the "Closed End" feature?

A: The closed end feature indicates that the connector body includes end caps or sealing elements that close the connector cavity. This design prevents accidental contact with internal terminals and provides strain relief for the cable entry point.

Q: Are there packaging differences between these parts?

A: Yes. Part 644371-3 packaging is not specified in available documentation. Part 3-644371-3 is supplied in bulk packaging. Packaging selection may affect order quantities and handling procedures but does not impact connector functionality or performance.

Q: What is the Moisture Sensitivity Level (MSL) rating?

A: Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions. These connectors do not require special storage, handling, or baking procedures prior to assembly.