TE Connectivity 640426-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 640426-2 is a 2-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 18 AWG discrete wire. This connector features a tin contact finish, closed-end design, and free-hanging in-line mounting configuration with locking ramp fastening.

The 640426-2 is classified as obsolete. Locating equivalent or substitute components is necessary to support legacy system maintenance, repair, and continued field deployment where this connector type is integrated into existing assemblies.

Substiute Parts

640426-2

TE Connectivity AMP ConnectorsIn Stock: 799640426-2 Datasheet

Current PartRFQ

3-640426-2

TE Connectivity AMP ConnectorsIn Stock: 37623-640426-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 640426-2 is determined by strict equivalence across the following critical parameters:

• Connector Type & Contact Configuration: Receptacle with female socket contacts
• Position Count & Pitch: 2 positions at 0.156" (3.96mm) pitch
• Termination Technology: IDC cable termination for 18 AWG discrete wire
• Mechanical Interface: Free-hanging in-line mounting with locking ramp fastening
• Contact Material & Finish: Tin plating at 80.0µin (2.03µm) thickness
• Series Designation: MTA-156 series compatibility

Substitute parts must maintain identical electrical and mechanical specifications across all parameters listed above. Packaging format and product status may differ between the main part and substitutes, provided all functional parameters remain unchanged.

Parameter Comparison

Engineering Selection Recommendations

The 640426-2 is an obsolete component. The direct substitute part 3-640426-2 is functionally equivalent across all electrical and mechanical parameters and is currently in active production status with 3749 units in stock.

Key Compliance Differences:

The 3-640426-2 substitute achieves RoHS compliance, whereas the original 640426-2 is RoHS non-compliant. For applications subject to RoHS regulatory requirements or procurement policies mandating RoHS-compliant components, the 3-640426-2 is the appropriate selection.

Both parts share identical connector specifications, contact configuration, termination method, and wire gauge compatibility. The substitute maintains the same MSL rating and export classification (EAR99).

For legacy system support where RoHS compliance is not a requirement, either part provides functional equivalence. The active production status and higher inventory availability of the 3-640426-2 make it the preferred choice for new procurement and ongoing supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 3-640426-2 be used as a direct replacement for the 640426-2?

A: Yes. The 3-640426-2 is functionally equivalent to the 640426-2 across all electrical and mechanical parameters, including connector type, position count, pitch, termination method, wire gauge, and contact finish specifications. Both parts are from the MTA-156 series and are mechanically and electrically interchangeable.

Q: What is the difference between 640426-2 and 3-640426-2?

A: The primary differences are product status and RoHS compliance. The 640426-2 is obsolete and RoHS non-compliant, while the 3-640426-2 is in active production and RoHS compliant. All functional connector specifications are identical.

Q: Does the packaging format affect compatibility?

A: No. The 640426-2 is supplied in standard packaging, while the 3-640426-2 is supplied in bulk packaging. Packaging format does not affect the electrical or mechanical performance of the connector itself.

Q: Are there any wire gauge or termination method restrictions?

A: Both parts are specified for 18 AWG discrete wire with IDC termination. Wire gauge and termination method are fixed specifications and cannot be altered. These parameters must match the application requirements.

Q: What is the pitch specification, and why is it important?

A: The pitch is 0.156" (3.96mm), representing the center-to-center distance between adjacent contact positions. Pitch is a critical parameter that determines mechanical and electrical compatibility with mating connectors and PCB layouts. Substitutes must maintain identical pitch.

Q: Can this connector be used with different wire gauges?

A: No. The 640426-2 and 3-640426-2 are specified exclusively for 18 AWG wire. The IDC termination mechanism and contact geometry are designed for this wire gauge only.

Q: What does "Closed End" mean?

A: Closed end indicates that the connector housing has a sealed end, preventing access to the internal contact cavity from one direction. This design feature provides strain relief and environmental protection for the terminated wire.

Q: Is the locking ramp fastening type compatible with standard IDC tooling?

A: The locking ramp fastening type is an integral feature of the MTA-156 series connector design. IDC termination is performed using standard IDC tooling compatible with this series. The locking ramp provides mechanical retention of the terminated wire.