TE Connectivity AMP Connectors 644381-5 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 644381-5 is a 5 Position Rectangular Receptacle Connector designed for IDC (Insulation Displacement Contact) termination with 18 AWG wire. This connector belongs to the MTA-156 series and features a tin-lead contact finish with closed-end design and polarizing key. The part is classified as obsolete, making identification of suitable substitute components necessary for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

644381-5

TE Connectivity AMP ConnectorsIn Stock: 1084644381-5 Datasheet

Current PartRFQ

3-643817-5

TE Connectivity AMP ConnectorsIn Stock: 26083-643817-5 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 644381-5 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Series designation (MTA-156)
• Connector type (Receptacle)
• Number of positions (5)
• Pitch specification (0.156" / 3.96mm)
• Cable termination method (IDC)
• Wire gauge compatibility (18 AWG)
• Mounting configuration (Free Hanging In-Line)
• Contact type (Female Socket)
• Fastening type (Locking Ramp)
• Features (Closed End, Polarizing Key)

The substitute part 3-643817-5 maintains full equivalence across all mandatory parameters. Variations in contact finish material (tin versus tin-lead), color designation, packaging format, and product status do not affect functional interchangeability within the specified electrical and mechanical constraints of the MTA-156 series.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 3-643817-5 provides full functional equivalence to the obsolete 644381-5 across all critical electrical and mechanical parameters. Selection of the substitute is supported by the following engineering considerations:

Product Status: The 644381-5 is classified as obsolete, whereas 3-643817-5 maintains active product status with confirmed inventory availability (2525 pieces in stock versus 1020 pieces for the main part). This status differential ensures long-term supply chain continuity.

Regulatory Compliance: The substitute part 3-643817-5 achieves ROHS3 compliance, whereas the main part 644381-5 is RoHS non-compliant. For applications subject to RoHS directives or customer compliance requirements, the substitute part satisfies regulatory obligations.

Contact Finish Specification: The main part specifies tin-lead contact finish, while the substitute provides tin contact finish. Both finishes maintain the specified contact finish thickness of 80.0µin (2.03µm) and are functionally equivalent for IDC termination applications within the MTA-156 series electrical parameters.

Physical and Electrical Interchangeability: Both parts maintain identical pitch (0.156"), position count (5), wire gauge (18 AWG), mounting configuration, and fastening mechanism. Mechanical and electrical interchangeability is assured for direct substitution in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 3-643817-5 be used as a direct replacement for the 644381-5 in existing assemblies?

A: Yes. The 3-643817-5 maintains identical electrical and mechanical specifications across all critical parameters including pitch, position count, wire gauge, IDC termination method, and mounting configuration. Direct substitution is supported without design modification.

Q: What is the significance of the contact finish difference between tin-lead and tin?

A: Both contact finishes are specified at 80.0µin (2.03µm) thickness and provide equivalent performance for IDC termination applications. The tin finish in the substitute part represents a material composition change rather than a performance degradation. Both finishes are functionally equivalent within the MTA-156 series electrical and mechanical constraints.

Q: Why is the 644381-5 classified as obsolete?

A: The 644381-5 is designated as obsolete by the manufacturer. The active substitute 3-643817-5 provides equivalent functionality and is recommended for new designs and ongoing procurement requirements.

Q: Does the color difference between black (644381-5) and orange (3-643817-5) affect functionality?

A: No. Color designation is a cosmetic parameter that does not affect electrical performance, mechanical compatibility, or termination characteristics. Both connectors function identically within the MTA-156 series specifications.

Q: What is the RoHS compliance status difference, and does it matter for my application?

A: The 644381-5 is RoHS non-compliant, while the 3-643817-5 is ROHS3 compliant. If your application, customer requirements, or regional regulations mandate RoHS compliance, the substitute part 3-643817-5 satisfies these requirements. For applications without RoHS mandates, both parts are functionally equivalent.

Q: Are both parts compatible with discrete and ribbon cable termination?

A: Yes. Both the 644381-5 and 3-643817-5 support IDC termination for discrete or ribbon cable configurations at 18 AWG wire gauge. Termination compatibility is identical between both parts.

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

A: Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These connectors can be stored and handled without special moisture control measures.