Equivalent & Substitute Parts for TE Connectivity 644375-6

Part Overview

The TE Connectivity 644375-6 is a 6-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 18 AWG wire. This connector features tin-lead contact finish and is classified as obsolete. Due to its obsolete status and RoHS non-compliant classification, equivalent substitute parts are necessary for new designs and ongoing production requirements. Active alternatives with improved compliance standards are available within the same connector family.

Substiute Parts

644375-6

TE Connectivity AMP ConnectorsIn Stock: 747644375-6 Datasheet

Current PartRFQ

3-644375-6

TE Connectivity AMP ConnectorsIn Stock: 7153-644375-6 Datasheet

DirectRFQ

3-640599-6

TE Connectivity AMP ConnectorsIn Stock: 11423-640599-6 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 644375-6 rectangular connector is determined by strict equivalence across the following critical parameters: connector type (receptacle), number of positions (6), pitch spacing (0.156"), contact type (female socket), cable termination method (IDC), wire gauge compatibility (18 AWG), mounting configuration (free hanging in-line), fastening mechanism (locking ramp), and contact finish thickness (80.0µin). All substitute parts must maintain identical mechanical and electrical characteristics within these parameters.

The primary distinction between the main part and substitutes is the contact finish material and product status. The original 644375-6 uses tin-lead finish and is obsolete with RoHS non-compliance. Direct substitutes employ tin finish with active product status and RoHS compliance, providing functional equivalence with improved regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

3-644375-6 (Direct Substitute): This part provides direct functional equivalence to the 644375-6 with improved compliance status. It maintains identical mechanical and electrical specifications while transitioning from tin-lead to tin contact finish. The part is active in production with RoHS compliance certification, making it the primary choice for applications requiring regulatory alignment with the original connector specifications.

3-640599-6 (Similar Substitute): This alternative maintains all critical electrical and mechanical parameters identical to the main part and direct substitute. The distinction is packaging format (bulk) and connector color (orange versus black). This part carries ROHS3 compliance certification and is actively produced. Selection of this part is appropriate when bulk packaging is preferred and color differentiation is acceptable for application requirements.

Both substitute parts are manufactured by TE Connectivity AMP Connectors within the MTA-156 series and provide full compatibility with 18 AWG IDC termination applications. The transition from tin-lead to tin contact finish does not affect functional performance within the specified contact finish thickness of 80.0µin (2.03µm).

Frequently Asked Questions (FAQ)

Q: Can the 3-644375-6 be used as a direct replacement for the 644375-6?

A: Yes. The 3-644375-6 maintains identical specifications across all critical parameters: 6-position receptacle configuration, 0.156" pitch, IDC termination for 18 AWG wire, free hanging in-line mounting, locking ramp fastening, and 80.0µin contact finish thickness. The primary difference is the contact finish material (tin versus tin-lead) and active product status with RoHS compliance.

Q: What is the difference between the 3-644375-6 and 3-640599-6?

A: Both parts are functionally equivalent with identical electrical and mechanical specifications. The differences are: connector color (black for 3-644375-6, orange for 3-640599-6), packaging format (standard for 3-644375-6, bulk for 3-640599-6), and RoHS certification level (RoHS Compliant versus ROHS3 Compliant). All other parameters, including pitch, termination method, wire gauge, and contact finish thickness, are identical.

Q: Why is the original 644375-6 marked as obsolete?

A: The 644375-6 is classified as obsolete due to its RoHS non-compliant status and tin-lead contact finish. Active alternatives with improved regulatory compliance are available within the same MTA-156 connector series.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist when substituting either the 3-644375-6 or 3-640599-6 for the 644375-6. All substitute parts maintain identical connector type, position count, pitch spacing, contact type, termination method, wire gauge, mounting configuration, and fastening mechanism. The contact finish transition from tin-lead to tin does not affect electrical or mechanical performance within the specified contact finish thickness.

Q: Does the color difference between black and orange connectors affect functionality?

A: No. Color is a visual identifier only and does not affect electrical or mechanical performance. The orange color of the 3-640599-6 may be used for application-specific identification or organization purposes but provides identical functional characteristics to the black 3-644375-6.

Q: What is the significance of the bulk packaging for the 3-640599-6?

A: Bulk packaging indicates the connector is supplied in larger quantities without individual packaging. This format is suitable for high-volume production environments and may offer cost advantages for large-scale applications. Functional specifications remain identical to standard packaging formats.