TE Connectivity 644329-9 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644329-9 is a 9-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 18 AWG discrete or ribbon cable. This connector features tin-lead contact finish and is rated for free-hanging in-line mounting applications with locking ramp fastening.

The 644329-9 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and field service requirements for systems utilizing this connector type.

Substiute Parts

644329-9

TE Connectivity AMP ConnectorsIn Stock: 649644329-9 Datasheet

Current PartRFQ

3-644329-9

TE Connectivity AMP ConnectorsIn Stock: 11863-644329-9 Datasheet

DirectRFQ

3-640426-9

TE Connectivity AMP ConnectorsIn Stock: 19213-640426-9 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 644329-9 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Connector type (Receptacle)
• Number of positions (9)
• Pitch specification (0.156" / 3.96mm)
• Series designation (MTA-156)
• Cable termination method (IDC)
• Wire gauge (18 AWG)
• Contact type (Female Socket)
• Mounting type (Free Hanging In-Line)
• Fastening type (Locking Ramp)
• Number of rows (1)
• Closed end feature

Allowable Variations:

• Contact finish material (Tin-Lead to Tin)
• Contact finish thickness (within specified tolerance)
• Connector body color
• Wire type compatibility (Discrete or Ribbon Cable to Discrete only)
• RoHS compliance status
• Product status (Obsolete to Active)

The substitute parts identified below maintain full mechanical and electrical compatibility with the original 644329-9 while offering improved availability and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

3-644329-9 (Direct Substitute - Recommended Primary Choice)

The 3-644329-9 is the direct successor to the obsolete 644329-9. This part maintains identical mechanical and electrical specifications while offering the following advantages:

• Active product status ensures ongoing availability and manufacturer support
• RoHS Compliant certification meets current environmental and regulatory requirements
• Identical connector geometry, pitch, and termination method guarantee mechanical interchangeability
• Contact finish change from Tin-Lead to Tin eliminates lead content while maintaining electrical performance
• Identical contact finish thickness (80.0µin) preserves electrical and mechanical characteristics
• Black color matches original connector appearance
• Supports both discrete and ribbon cable termination

3-640426-9 (Similar Substitute - Alternative Option)

The 3-640426-9 provides functional equivalence with the following considerations:

• Active product status and ROHS3 Compliant certification
• Identical electrical and mechanical specifications across all critical parameters
• Wire type specification limited to discrete cable only (does not support ribbon cable)
• Orange body color differs from original black connector
• Bulk packaging designation
• Suitable for applications using discrete 18 AWG cable exclusively

Frequently Asked Questions (FAQ)

Q: Can the 3-644329-9 be used as a direct replacement for the 644329-9 in existing designs?

A: Yes. The 3-644329-9 maintains identical pitch (0.156"), position count (9), series designation (MTA-156), mounting type, and fastening mechanism. The contact finish change from Tin-Lead to Tin does not affect electrical or mechanical compatibility. The connector is mechanically and electrically interchangeable.

Q: What is the difference between the 3-644329-9 and 3-640426-9?

A: Both parts are electrically and mechanically equivalent 9-position MTA-156 receptacles with IDC termination for 18 AWG wire. The primary difference is wire type compatibility: the 3-644329-9 supports both discrete and ribbon cable, while the 3-640426-9 is specified for discrete cable only. The 3-640426-9 also features orange body color versus black and is supplied in bulk packaging.

Q: Why is the original 644329-9 marked as obsolete?

A: The 644329-9 is obsolete due to its Tin-Lead contact finish, which is no longer compliant with current RoHS regulations. The 3-644329-9 replaces this part with an RoHS-compliant Tin finish while maintaining all functional specifications.

Q: Are there any electrical performance differences between Tin-Lead and Tin contact finishes?

A: No. Both contact finishes provide equivalent electrical performance for IDC termination applications. The contact finish thickness (80.0µin) is identical across all three parts, ensuring consistent contact resistance and signal integrity.

Q: Can I use the 3-640426-9 if my application uses ribbon cable?

A: No. The 3-640426-9 is specified for discrete wire only. For ribbon cable applications, use the 3-644329-9, which explicitly supports both discrete and ribbon cable termination.

Q: What is the significance of the MSL rating?

A: All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity limitations. These connectors can be stored and handled under standard conditions without special moisture control requirements.

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

A: The 3-644329-9 is RoHS Compliant, while the 3-640426-9 is ROHS3 Compliant. Both meet current environmental regulations. The original 644329-9 is RoHS non-compliant due to its Tin-Lead finish.