TE Connectivity 644470-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644470-2 is a 2-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 20 AWG discrete or ribbon cable. This connector features a tin-lead contact finish, feed-through design, and polarizing key for secure mating. The part is currently in active product status with 1050 units in stock.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the connector interface, allowing direct replacement in applications where the primary part becomes unavailable or when alternative compliance certifications are required.

Substiute Parts

644470-2

TE Connectivity AMP ConnectorsIn Stock: 1153644470-2 Datasheet

Current PartRFQ

3-644470-2

TE Connectivity AMP ConnectorsIn Stock: 8083-644470-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 644470-2 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Connector Type: Receptacle
• Number of Positions: 2
• Pitch: 0.156" (3.96mm)
• Wire Gauge: 20 AWG
• Cable Termination: IDC
• Number of Rows: 1
• Mounting Type: Free Hanging (In-Line)
• Features: Feed Through, Polarizing Key
• Series: MTA-156

Allowable Variations:

• Contact Finish: Tin-Lead or Tin (both acceptable for IDC receptacle applications)
• Product Status: Active or Obsolete (functional equivalence maintained)
• RoHS Compliance: Non-compliant or ROHS3 Compliant (compliance certification difference)
• Packaging: Standard or Bulk (inventory format variation)

The substitute part 3-644470-2 maintains all mandatory parameters while differing only in contact finish material (Tin versus Tin-Lead) and regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: TE Connectivity 644470-2

The 644470-2 is the recommended primary choice for new designs and applications. This part maintains active product status with established supply availability (1050 units in stock). The tin-lead contact finish provides established performance characteristics in IDC receptacle applications. This part is suitable for applications where RoHS non-compliance is acceptable or where legacy system compatibility is required.

Alternative Selection: TE Connectivity 3-644470-2

The 3-644470-2 serves as a functional equivalent when ROHS3 compliance is a design requirement. This part maintains identical electrical and mechanical parameters, with the primary difference being the contact finish material (tin instead of tin-lead) and regulatory certification status. The substitute part is classified as obsolete, indicating limited future availability (753 units currently in stock). Selection of this part should be based on specific compliance mandates rather than performance considerations, as both parts deliver equivalent functional performance in IDC receptacle applications.

Compliance Considerations:

Applications subject to RoHS3 regulations should specify the 3-644470-2. Applications without RoHS compliance requirements should utilize the 644470-2 to ensure continued supply chain access and active product support.

Frequently Asked Questions (FAQ)

Q: Can the 3-644470-2 be used as a direct replacement for the 644470-2 in existing assemblies?

A: Yes. Both parts maintain identical connector type, position count, pitch, wire gauge, termination method, and mounting configuration. The contact finish difference (tin versus tin-lead) does not affect mechanical or electrical compatibility in IDC receptacle applications. Physical form factor and mating interface are identical.

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

A: Both contact finishes are specified at 80.0µin (2.03µm) thickness and deliver equivalent performance in IDC termination applications. The tin-lead finish in the 644470-2 represents the original specification. The tin finish in the 3-644470-2 reflects ROHS3 compliance requirements. Selection between these finishes is driven by regulatory compliance needs rather than performance differentiation.

Q: Why is the 3-644470-2 listed as obsolete if it is functionally equivalent?

A: Product status reflects manufacturing and supply chain decisions independent of functional capability. The 3-644470-2 remains electrically and mechanically compatible with the 644470-2 despite its obsolete classification. Obsolete status indicates that TE Connectivity has transitioned production focus to the active 644470-2 part number. Current inventory of the 3-644470-2 (753 units) remains available for immediate use.

Q: Are there packaging differences between these parts?

A: The 644470-2 is supplied in standard packaging, while the 3-644470-2 is supplied in bulk packaging. Packaging format does not affect connector performance or compatibility. Selection between packaging options depends on inventory management and procurement requirements rather than technical specifications.

Q: What is the significance of the base product number 644470?

A: The base product number 644470 identifies the core connector design within the MTA-156 series. Both the 644470-2 and 3-644470-2 share this base number, indicating they are variants of the same fundamental 2-position receptacle design. The suffix "-2" designates the 2-position configuration.

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

A: Yes. Both parts specify compatibility with discrete or ribbon cable at 20 AWG. The IDC termination method accommodates both cable types without modification to the connector interface.

Q: What does the polarizing key feature provide?

A: The polarizing key ensures correct mating orientation between receptacle and plug connectors. This feature prevents reversed insertion and protects circuits from polarity-related damage. Both the 644470-2 and 3-644470-2 include this polarizing key feature.