TE Connectivity 644540-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644540-2 is a 2-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 a feed-through receptacle with right-angle mounting capability. The part is currently active in production with 806 units in stock.

Substitute parts are identified to address specific application requirements, including RoHS compliance status and contact finish variations, while maintaining electrical and mechanical compatibility within the MTA-100 connector family.

Substiute Parts

644540-2

TE Connectivity AMP ConnectorsIn Stock: 837644540-2 Datasheet

Current PartRFQ

3-644540-2

TE Connectivity AMP ConnectorsIn Stock: 561753-644540-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the main part (644540-2) and the identified equivalent (3-644540-2) is based on the following criteria:

Electrical Compatibility Parameters:

• Identical connector type (rectangular receptacle)
• Identical number of positions (2)
• Identical pitch (0.100" / 2.54mm)
• Identical cable termination method (IDC)
• Identical wire gauge (22 AWG)
• Identical contact finish thickness (80.0µin / 2.03µm)

Mechanical Compatibility Parameters:

• Identical mounting type (free hanging in-line, right angle)
• Identical fastening type (locking ramp)
• Identical series designation (MTA-100)
• Identical color (red)

Regulatory Variation:

• Main part: RoHS non-compliant, tin-lead contact finish
• Substitute part: RoHS3 compliant, tin contact finish

The substitute part 3-644540-2 maintains full electrical and mechanical compatibility while offering RoHS3 compliance through contact finish modification from tin-lead to tin. Both parts share identical contact finish thickness and all critical dimensional parameters.

Parameter Comparison

Engineering Selection Recommendations

Selection Criteria Based on Regulatory Requirements:

The 644540-2 (tin-lead contact finish) is suitable for applications where RoHS compliance is not mandated or where legacy system compatibility requires tin-lead termination.

The 3-644540-2 (tin contact finish) is the appropriate selection for applications subject to RoHS3 compliance requirements, including EU market applications and regulated industries requiring lead-free component specifications.

Availability Consideration:

The substitute part 3-644540-2 maintains significantly higher inventory availability (56,161 units) compared to the main part (806 units), supporting supply chain continuity for high-volume production requirements.

Compliance Status:

Both parts maintain identical ECCN (EAR99) and HTSUS (8536.69.8000) classifications, ensuring consistent export and tariff treatment. The MSL rating of 1 (unlimited) applies to both parts, indicating no moisture sensitivity constraints for storage or handling.

Frequently Asked Questions (FAQ)

Q: Are the 644540-2 and 3-644540-2 connectors mechanically interchangeable?

A: Yes. Both connectors share identical pitch (0.100" / 2.54mm), mounting type (free hanging in-line, right angle), fastening mechanism (locking ramp), and physical dimensions. They are fully mechanically interchangeable within MTA-100 series applications.

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

A: Both contact finishes are applied at identical thickness (80.0µin / 2.03µm) and provide equivalent electrical performance and environmental resistance. The primary difference is regulatory: tin-lead does not comply with RoHS3 requirements, while tin does. The contact finish material does not affect electrical conductivity or mating force characteristics.

Q: Can I use the 3-644540-2 as a direct replacement for the 644540-2 in existing designs?

A: Yes, the 3-644540-2 is a direct substitute for the 644540-2. All electrical parameters, mechanical dimensions, and performance characteristics are identical. The substitution is appropriate for new designs and retrofit applications where RoHS3 compliance is required or preferred.

Q: What does IDC termination mean for these connectors?

A: IDC (Insulation Displacement Contact) termination allows direct connection of 22 AWG discrete or ribbon cable without stripping insulation. The connector contacts pierce the cable insulation during insertion, establishing electrical connection while maintaining insulation integrity around the contact point.

Q: Are there any packaging differences between these two parts?

A: The 644540-2 is supplied in standard packaging, while the 3-644540-2 is supplied in bulk packaging. This packaging difference does not affect connector performance or compatibility; it reflects different distribution and inventory management approaches.

Q: What is the MSL rating and why does it matter?

A: Both connectors carry an MSL (Moisture Sensitivity Level) rating of 1, which indicates unlimited shelf life with no moisture sensitivity constraints. These connectors do not require special desiccant storage or baking procedures prior to assembly.

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

A: Yes. Both the 644540-2 and 3-644540-2 are specified for use with discrete or ribbon cable at 22 AWG wire gauge. The IDC termination method accommodates both cable types without modification.