TE Connectivity 644540-3 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 644540-3 is a 3-position rectangular receptacle connector designed for IDC (Insulation Displacement Contact) termination with 22 AWG wire. This connector features a tin-lead contact finish and operates in a free-hanging, in-line or right-angle mounting configuration with locking ramp fastening. The part is classified as obsolete, necessitating identification of active equivalent components that maintain electrical and mechanical compatibility for ongoing applications and new designs.

Substiute Parts

644540-3

TE Connectivity AMP ConnectorsIn Stock: 893644540-3 Datasheet

Current PartRFQ

3-644540-3

TE Connectivity AMP ConnectorsIn Stock: 98443-644540-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 644540-3 connector is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Parameters:

• Series designation (MTA-100)
• Number of positions (3)
• Contact pitch (0.100" / 2.54mm)
• Contact type (Female Socket)
• Wire gauge rating (22 AWG)
• Cable termination method (IDC)

Mechanical Compatibility Parameters:

• Connector type (Receptacle)
• Mounting configuration (Free Hanging, In-Line, Right Angle)
• Fastening mechanism (Locking Ramp)
• Feed-through feature presence

Environmental & Regulatory Parameters:

• Moisture Sensitivity Level (MSL 1)
• ECCN classification (EAR99)
• HTSUS code (8536.69.8000)

The substitute part 3-644540-3 maintains full equivalence across all critical parameters while transitioning from obsolete to active product status. The primary distinction is the contact finish specification: the original part specifies tin-lead, while the substitute specifies tin only. Both finishes meet the same contact finish thickness requirement of 80.0µin (2.03µm).

Parameter Comparison

Engineering Selection Recommendations

The substitute part 3-644540-3 is the direct equivalent for the obsolete 644540-3 connector. Selection of the substitute is based on the following engineering factors:

Product Status Transition: The original 644540-3 is classified as obsolete, while the substitute 3-644540-3 maintains active product status with confirmed inventory availability (9825 pieces in stock versus 875 pieces for the original).

Regulatory Compliance: The substitute part achieves RoHS compliance, whereas the original is RoHS non-compliant. This distinction is significant for applications subject to RoHS directives and environmental regulations.

Electrical and Mechanical Equivalence: Both parts maintain identical specifications across all critical connector parameters including pitch, position count, mounting configuration, fastening mechanism, and wire gauge rating. The connectors are fully interchangeable in applications designed for the MTA-100 series 3-position receptacle.

Contact Finish Specification: The transition from tin-lead to tin contact finish does not affect electrical performance or mechanical compatibility. Both finishes meet the specified contact finish thickness of 80.0µin (2.03µm) and are suitable for IDC termination with 22 AWG wire.

For new designs and ongoing production, the 3-644540-3 substitute part is the appropriate selection. For legacy systems currently utilizing the 644540-3, direct substitution with 3-644540-3 is electrically and mechanically valid.

Frequently Asked Questions (FAQ)

Q: Are the 644540-3 and 3-644540-3 connectors physically interchangeable?

A: Yes. Both connectors share identical mechanical dimensions, pitch spacing (0.100"), mounting configuration, and fastening mechanisms. They are direct physical substitutes within the MTA-100 series.

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

A: The original 644540-3 specifies a tin-lead contact finish, while the substitute 3-644540-3 specifies tin only. Both finishes meet the same contact finish thickness requirement of 80.0µin (2.03µm). The tin finish in the substitute part is suitable for IDC termination and provides equivalent electrical performance.

Q: Why is the substitute part RoHS compliant while the original is not?

A: The RoHS compliance difference reflects the product development timeline and regulatory requirements at the time of manufacture. The substitute 3-644540-3 was designed to meet current RoHS directives, eliminating lead from the contact finish composition.

Q: Can the 3-644540-3 be used in applications originally designed for the 644540-3?

A: Yes. The substitute part maintains full electrical and mechanical compatibility. All critical parameters including connector type, position count, pitch, mounting type, fastening mechanism, wire gauge rating, and cable termination method are identical.

Q: What is the significance of the packaging difference between the two parts?

A: The original 644540-3 does not specify packaging information, while the substitute 3-644540-3 is supplied in bulk packaging. This distinction affects procurement and inventory management but does not impact connector performance or compatibility.

Q: Are there any wire gauge or cable type restrictions when using the 3-644540-3?

A: No. The substitute part is rated for 22 AWG wire and accepts both discrete and ribbon cable types, identical to the original specification. IDC termination is the specified cable termination method for both parts.

Q: What is the moisture sensitivity level for the 3-644540-3?

A: Both the original and substitute parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.