TE Connectivity 3-644329-3 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3-644329-3 is a 3-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 18 AWG discrete or ribbon cable. This connector features a tin contact finish, closed-end design, and free-hanging in-line mounting configuration with locking ramp fastening.

The 3-644329-3 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure continued availability for maintenance, repair, and new production applications where this connector type is specified.

Substiute Parts

3-644329-3

TE Connectivity AMP ConnectorsIn Stock: 6873-644329-3 Datasheet

Current PartRFQ

3-644860-3

TE Connectivity AMP ConnectorsIn Stock: 7413-644860-3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3-644329-3 is determined by strict equivalence across the following critical parameters:

• Connector Series: MTA-156 (maintains mechanical and electrical compatibility)
• Number of Positions: 3 (exact position count match required)
• Pitch: 0.156" (3.96mm) (ensures proper mating with corresponding plug connectors)
• Contact Type: Female Socket (receptacle configuration)
• Cable Termination: IDC (insulation displacement contact method)
• Wire Gauge: 18 AWG (conductor size compatibility)
• Contact Finish: Tin (electrical and corrosion resistance properties)
• Mounting Type: Free Hanging (In-Line) (installation method compatibility)

The substitute part 3-644860-3 matches all critical parameters and belongs to the same MTA-156 series, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 3-644860-3 is the direct substitute for the obsolete 3-644329-3. Both parts are manufactured by TE Connectivity and belong to the MTA-156 series with identical electrical and mechanical specifications.

Product Status Consideration: The 3-644329-3 is classified as obsolete, while the 3-644860-3 maintains active product status. For new designs and ongoing production requirements, the 3-644860-3 is the appropriate selection to ensure long-term component availability and supply chain continuity.

Compliance Status: Both parts meet RoHS compliance requirements and carry identical ECCN and HTSUS classifications, confirming regulatory equivalence. The MSL rating of 1 (Unlimited) for both parts indicates no moisture sensitivity restrictions during storage or handling.

Packaging Difference: The 3-644329-3 is supplied in standard packaging, while the 3-644860-3 is available in bulk packaging. This distinction affects order quantities and logistics but does not impact functional or electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the 3-644860-3 be used as a direct replacement for the 3-644329-3 in existing applications?

A: Yes. The 3-644860-3 is a direct functional equivalent with identical electrical and mechanical specifications, including connector type, position count, pitch, contact configuration, termination method, wire gauge, and contact finish. Both parts are compatible with the same mating connectors and cable assemblies.

Q: What is the primary reason for substituting the 3-644329-3?

A: The 3-644329-3 is classified as obsolete. The 3-644860-3 is the active equivalent part, ensuring continued availability for maintenance, repair, and new production applications.

Q: Are there any differences in RoHS compliance between these parts?

A: Both parts are RoHS compliant. The 3-644329-3 is ROHS3 compliant, and the 3-644860-3 is RoHS compliant. Both meet current regulatory requirements for restricted substances.

Q: Does the packaging difference between these parts affect compatibility?

A: No. The packaging difference (standard versus bulk) is a logistics consideration only. It does not affect the electrical performance, mechanical fit, or functional compatibility of the connector itself.

Q: Are the contact finish specifications identical?

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

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

A: Yes. Both the 3-644329-3 and 3-644860-3 support IDC termination with discrete or ribbon cable at 18 AWG wire gauge.

Q: What is the MSL rating for these connectors?

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