TE Connectivity 644312-4 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644312-4 is a 4-position rectangular receptacle connector from the MTA-100 series, designed for IDC (Insulation Displacement Contact) termination with 24 AWG discrete or ribbon cable. This connector features tin-lead contact finish, closed-end housing, and locking ramp fastening. The part is Active in product status with RoHS compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical and mechanical specifications are maintained across connector geometry, contact configuration, termination method, and compliance standards. Alternative part numbers may differ in packaging format or contact finish composition while preserving functional compatibility.

Substiute Parts

644312-4

TE Connectivity AMP ConnectorsIn Stock: 853644312-4 Datasheet

Current PartRFQ

3-644312-4

TE Connectivity AMP ConnectorsIn Stock: 20743-644312-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 644312-4 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Parameters:

• 4-position configuration with 0.100" (2.54mm) pitch spacing
• Female socket contact type
• IDC termination method for 24 AWG wire
• Support for discrete or ribbon cable

Mechanical Compatibility Parameters:

• Single-row rectangular receptacle housing
• Free hanging (in-line) and right-angle mounting capability
• Locking ramp fastening mechanism
• Closed-end housing design
• Black color

Compliance Parameters:

• MTA-100 series designation
• RoHS compliance status
• MSL 1 rating (unlimited moisture sensitivity)

The substitute part 3-644312-4 maintains all electrical and mechanical parameters while differing in contact finish composition (tin versus tin-lead) and packaging format (bulk versus standard). These variations do not affect functional compatibility or performance in equivalent applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 644312-4 and 3-644312-4 are Active products from TE Connectivity with equivalent electrical and mechanical specifications. Selection between these parts is based on the following criteria:

644312-4 (Tin-Lead Contact Finish):

• RoHS Compliant status
• Standard packaging format
• Tin-lead contact composition provides established performance characteristics in legacy applications

3-644312-4 (Tin Contact Finish):

• ROHS3 Compliant status, indicating enhanced environmental compliance
• Bulk packaging format, suitable for high-volume procurement
• Tin contact finish aligns with modern lead-free manufacturing standards
• Higher inventory availability (2035 pcs vs. 773 pcs)

Both parts maintain identical contact finish thickness (80.0µin / 2.03µm), MSL 1 rating, and all mechanical and electrical parameters. Selection should be based on application compliance requirements, packaging needs, and inventory availability.

Frequently Asked Questions (FAQ)

Q: Are the 644312-4 and 3-644312-4 electrically interchangeable?

A: Yes. Both connectors maintain identical electrical specifications including 4-position configuration, 0.100" pitch, female socket contacts, IDC termination for 24 AWG wire, and locking ramp fastening. The contact finish difference (tin-lead versus tin) does not affect electrical compatibility.

Q: What is the difference between tin-lead and tin contact finishes?

A: The 644312-4 features tin-lead contact finish while the 3-644312-4 features tin contact finish. Both maintain the same contact finish thickness of 80.0µin (2.03µm). The contact finish composition affects material compliance standards and environmental considerations but does not alter electrical performance or mechanical compatibility.

Q: Can I use 3-644312-4 as a direct replacement for 644312-4?

A: Yes. The 3-644312-4 is a direct substitute for the 644312-4. All electrical, mechanical, and dimensional parameters are equivalent. The primary differences are contact finish composition (tin versus tin-lead) and packaging format (bulk versus standard).

Q: What does the packaging difference mean?

A: The 644312-4 is supplied in standard packaging while the 3-644312-4 is supplied in bulk packaging. This affects order quantities and handling but does not impact connector performance or compatibility.

Q: Are both parts RoHS compliant?

A: Yes. The 644312-4 is RoHS Compliant and the 3-644312-4 is ROHS3 Compliant. Both meet RoHS requirements. ROHS3 represents an updated compliance designation reflecting current environmental standards.

Q: What wire gauges and cable types are supported?

A: Both connectors support 24 AWG wire with IDC termination. Wire type can be discrete individual conductors or ribbon cable, providing flexibility in cable assembly configurations.

Q: Is the MSL rating the same for both parts?

A: Yes. Both the 644312-4 and 3-644312-4 have MSL 1 rating, indicating unlimited moisture sensitivity level with no special storage or handling requirements.

Q: Can these connectors be used in both in-line and right-angle orientations?

A: Yes. Both connectors support free hanging mounting in both in-line and right-angle configurations, providing design flexibility for various PCB and cable routing requirements.