TE Connectivity 3-640595-3 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3-640595-3 is a 3-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 26 AWG wire. This connector features a tin contact finish, free-hanging in-line mounting, and locking ramp fastening. The part is classified as obsolete, making identification of active equivalent components necessary for ongoing procurement and system maintenance. Substitute parts must maintain identical electrical and mechanical specifications to ensure direct compatibility in existing applications.

Substiute Parts

3-640595-3

TE Connectivity AMP ConnectorsIn Stock: 10003-640595-3 Datasheet

Current PartRFQ

3-643821-3

TE Connectivity AMP ConnectorsIn Stock: 12673-643821-3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3-640595-3 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Parameters:

• Connector type (Receptacle)
• Number of positions (3)
• Contact type (Female Socket)
• Pitch specification (0.156" / 3.96mm)
• Wire gauge rating (26 AWG)
• Cable termination method (IDC)
• Contact finish material (Tin)

Mechanical Compatibility Parameters:

• Mounting type (Free Hanging In-Line)
• Fastening type (Locking Ramp)
• Series designation (MTA-156)

Compliance Parameters:

• RoHS compliance status
• Moisture Sensitivity Level (MSL 1)

The substitute part 3-643821-3 maintains equivalence across all critical parameters while offering active product status and enhanced feature set (closed end design with polarizing key).

Parameter Comparison

Engineering Selection Recommendations

The 3-643821-3 serves as the direct functional equivalent to the obsolete 3-640595-3. Both components share identical electrical and mechanical specifications across all critical parameters including connector type, position count, pitch, contact configuration, termination method, and wire gauge rating.

Primary Selection Basis:

The 3-643821-3 is recommended for new procurement and replacement applications due to its active product status. The obsolete designation of the 3-640595-3 indicates discontinued manufacturing and limited long-term availability. Both parts maintain equivalent RoHS compliance and MSL ratings, ensuring regulatory and environmental compatibility.

Feature Differentiation:

The 3-643821-3 incorporates a closed-end design with polarizing key features, providing enhanced mechanical protection and keying capability compared to the feed-through design of the 3-640595-3. These additions do not compromise electrical compatibility and provide improved connector reliability in field applications.

Compliance Alignment:

Both parts are RoHS compliant with MSL 1 rating, supporting deployment in standard industrial and commercial environments without moisture sensitivity constraints.

Frequently Asked Questions (FAQ)

Q: Can the 3-643821-3 directly replace the 3-640595-3 in existing applications?

A: Yes. The 3-643821-3 maintains identical specifications across all critical electrical and mechanical parameters including connector type, position count, pitch, contact type, wire gauge, termination method, and contact finish. Direct substitution is supported without circuit or mechanical redesign.

Q: What is the significance of the product status difference between these parts?

A: The 3-640595-3 is classified as obsolete, indicating discontinued manufacturing. The 3-643821-3 maintains active product status with current manufacturing and availability. For new designs and ongoing procurement, the active part is the appropriate selection.

Q: How do the feature differences affect compatibility?

A: The 3-643821-3 includes closed-end design and polarizing key features, while the 3-640595-3 features feed-through design. These differences enhance mechanical protection and keying in the substitute part without affecting electrical performance or pin-to-pin compatibility.

Q: Are both parts RoHS compliant?

A: Yes. Both the 3-640595-3 and 3-643821-3 are RoHS compliant with identical MSL 1 ratings, supporting equivalent environmental and regulatory requirements.

Q: What packaging differences exist between these parts?

A: The 3-640595-3 is supplied with unspecified packaging, while the 3-643821-3 is supplied in bulk packaging. Both configurations support standard component handling and integration into manufacturing processes.

Q: Are the contact finish specifications identical?

A: Yes. Both parts feature tin contact finish with 80.0µin (2.03µm) thickness, ensuring equivalent electrical conductivity and corrosion resistance characteristics.

Q: Can either part accommodate both discrete and ribbon cable?

A: Yes. Both the 3-640595-3 and 3-643821-3 support discrete or ribbon cable termination through IDC methodology, providing flexibility in cable assembly configurations.