TE Connectivity 1-644375-2 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 1-644375-2 is a 12 Position Rectangular Receptacle Connector with IDC termination, designed for discrete or ribbon cable applications at 18 AWG wire gauge. This connector is part of the MTA-156 series and features tin-lead contact finish with feed-through capability.

The 1-644375-2 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this connector type.

Substiute Parts

1-644375-2

TE Connectivity AMP ConnectorsIn Stock: 9651-644375-2 Datasheet

Current PartRFQ

4-644375-2

TE Connectivity AMP ConnectorsIn Stock: 11064-644375-2 Datasheet

DirectRFQ

4-640599-2

TE Connectivity AMP ConnectorsIn Stock: 14964-640599-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for rectangular connectors in the MTA-156 series is determined by strict alignment of the following parameters:

Critical Matching Parameters:

• Connector type (Receptacle)
• Number of positions (12)
• Pitch specification (0.156" / 3.96mm)
• Wire gauge (18 AWG)
• Cable termination method (IDC)
• Mounting configuration (Free Hanging In-Line)
• Contact type (Female Socket)
• Fastening type (Locking Ramp)
• Feed-through feature availability

Allowable Variations:

• Contact finish material (tin-lead to tin conversion acceptable)
• Contact finish thickness (maintained at 80.0µin)
• Color designation
• Product status (obsolete to active transition)
• RoHS compliance level
• Packaging configuration

The substitute parts 4-644375-2 and 4-640599-2 maintain all critical parameters while offering improved compliance and active product status.

Parameter Comparison

Engineering Selection Recommendations

4-644375-2 (Direct Substitute - Recommended Primary Choice)

The 4-644375-2 represents the direct evolution of the 1-644375-2. This part maintains identical mechanical and electrical specifications while transitioning from tin-lead to tin contact finish. The shift from tin-lead to tin contact material aligns with modern RoHS compliance requirements. The 4-644375-2 carries active product status, ensuring long-term availability and supply chain stability. This part is the preferred substitute for new designs and ongoing production applications.

4-640599-2 (Similar Substitute - Alternative Option)

The 4-640599-2 provides functional equivalence with all critical electrical and mechanical parameters matching the main part. This connector differs in color designation (orange versus black) and packaging configuration (bulk). The 4-640599-2 achieves ROHS3 compliance and maintains active product status. This part serves as a viable alternative when the direct substitute is unavailable or when bulk packaging is operationally advantageous.

Compliance Transition Consideration

Both substitute parts transition from RoHS non-compliant to RoHS compliant status. This compliance upgrade reflects current regulatory requirements and does not impact electrical or mechanical performance within the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can the 4-644375-2 directly replace the 1-644375-2 in existing assemblies?

A: Yes. The 4-644375-2 maintains all critical parameters including connector type, position count, pitch, wire gauge, IDC termination, and mounting configuration. The transition from tin-lead to tin contact finish does not affect mechanical or electrical compatibility.

Q: What is the significance of the contact finish change from tin-lead to tin?

A: The contact finish material change reflects RoHS compliance evolution. Tin contact finish provides equivalent electrical performance and contact reliability at the specified 80.0µin thickness. This change does not impact connector function or compatibility with mating components.

Q: Are the 4-644375-2 and 4-640599-2 interchangeable?

A: Both parts are functionally equivalent across all critical electrical and mechanical parameters. The primary differences are color designation and packaging. Selection between these two depends on specific application requirements and packaging preferences.

Q: Why is the 1-644375-2 marked as obsolete?

A: Obsolete status reflects the manufacturer's discontinuation of this part number. The transition to active alternatives (4-644375-2 and 4-640599-2) ensures continued availability and compliance with current regulatory standards.

Q: Does the color difference between the 4-644375-2 (black) and 4-640599-2 (orange) affect performance?

A: No. Color designation is a visual identifier only and does not affect electrical or mechanical performance. Selection based on color should align with application-specific identification or assembly requirements.

Q: What is the Moisture Sensitivity Level (MSL) significance for these connectors?

A: All three parts carry MSL 1 (Unlimited), indicating no moisture sensitivity constraints. These connectors can be stored and handled without special moisture control measures.

Q: Are there any restrictions on using these connectors in new designs?

A: The 4-644375-2 and 4-640599-2 are both active products suitable for new designs. The 1-644375-2 should not be specified for new designs due to obsolete status and RoHS non-compliance.