TE Connectivity 644540-4 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644540-4 is a 4-position rectangular receptacle connector from the MTA-100 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 obsolete. Due to its obsolete product status, identification of equivalent substitute parts is necessary to support ongoing maintenance, repair, and legacy system requirements. The substitute part maintains functional compatibility while offering improved compliance status.

Substiute Parts

644540-4

TE Connectivity AMP ConnectorsIn Stock: 1017644540-4 Datasheet

Current PartRFQ

3-644540-4

TE Connectivity AMP ConnectorsIn Stock: 10063-644540-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 644540-4 is based on strict equivalence across the following critical parameters:

Mechanical Compatibility Parameters:

• Connector type (Receptacle)
• Number of positions (4)
• Pitch spacing (0.100" / 2.54mm)
• Number of rows (1)
• Contact type (Female Socket)
• Mounting configuration (Free Hanging, In-Line, Right Angle)
• Fastening mechanism (Locking Ramp)

Electrical & Termination Parameters:

• Cable termination method (IDC)
• Wire gauge compatibility (22 AWG)
• Wire type support (Discrete or Ribbon Cable)
• Feed-through feature presence

Environmental & Compliance Parameters:

• Moisture Sensitivity Level (MSL 1)
• Series designation (MTA-100)
• Contact finish thickness (80.0µin / 2.03µm)

The substitute part 3-644540-4 maintains identical specifications across all mechanical, electrical, and environmental parameters while offering improved regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 3-644540-4

The part 3-644540-4 is the direct equivalent substitute for 644540-4. Both connectors are manufactured by TE Connectivity within the MTA-100 series and maintain identical mechanical, electrical, and environmental specifications. The substitute part is functionally interchangeable for all applications requiring a 4-position, 0.100" pitch IDC receptacle connector with 22 AWG wire compatibility.

Compliance Advantages:

The substitute part 3-644540-4 offers improved regulatory compliance status. It is ROHS3 compliant, whereas the original 644540-4 is RoHS non-compliant. This distinction is significant for applications subject to RoHS directives and environmental regulations.

Product Status Consideration:

The original part 644540-4 carries an obsolete product status, indicating discontinued manufacturing and limited availability. The substitute part 3-644540-4 maintains active product status, ensuring ongoing availability and supply chain reliability for new procurements and system maintenance.

Contact Finish Specification:

The original part features tin-lead contact finish, while the substitute features tin contact finish. Both maintain identical contact finish thickness of 80.0µin (2.03µm). This difference reflects the transition from lead-containing to lead-free manufacturing standards aligned with RoHS compliance requirements.

Frequently Asked Questions (FAQ)

Q: Are 644540-4 and 3-644540-4 mechanically interchangeable?

A: Yes. Both connectors share identical mechanical specifications including 4-position configuration, 0.100" pitch, female socket contact type, free hanging in-line and right angle mounting options, and locking ramp fastening. They are mechanically interchangeable in all applications.

Q: Can 3-644540-4 terminate the same wire gauges as 644540-4?

A: Yes. Both connectors support 22 AWG wire gauge for discrete or ribbon cable termination using IDC (Insulation Displacement Contact) technology. Wire termination compatibility is identical.

Q: What is the difference in contact finish between these parts?

A: The original 644540-4 uses tin-lead contact finish, while the substitute 3-644540-4 uses tin contact finish. Both maintain the same contact finish thickness of 80.0µin (2.03µm). The tin finish in the substitute reflects lead-free manufacturing standards.

Q: Why is 644540-4 listed as obsolete?

A: The 644540-4 carries an obsolete product status, indicating that TE Connectivity has discontinued manufacturing this part. The substitute 3-644540-4 maintains active product status and is the current production equivalent.

Q: Does the substitute part meet RoHS requirements?

A: Yes. The substitute part 3-644540-4 is ROHS3 compliant. The original 644540-4 is RoHS non-compliant. For applications requiring RoHS compliance, the substitute part is the appropriate selection.

Q: Are there packaging differences between these parts?

A: The original 644540-4 packaging information is not specified. The substitute 3-644540-4 is supplied in bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: What is the Moisture Sensitivity Level for both parts?

A: Both connectors carry Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements.

Q: Can I use 3-644540-4 as a direct replacement in existing designs?

A: Yes. The substitute part 3-644540-4 is a direct functional equivalent with identical electrical, mechanical, and environmental specifications. It is suitable for direct replacement in existing designs and new applications.