TE Connectivity 643819-4 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 643819-4 is a 4-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 22 AWG discrete or ribbon cable. This connector features a tin-lead contact finish, closed-end design with polarizing key, and free-hanging in-line mounting configuration. The part is currently active in production with 1144 units in stock. Substitute parts are identified to address inventory availability, compliance requirements, or packaging preferences while maintaining functional equivalence.

Substiute Parts

643819-4

TE Connectivity AMP ConnectorsIn Stock: 1183643819-4 Datasheet

Current PartRFQ

3-643819-4

TE Connectivity AMP ConnectorsIn Stock: 32073-643819-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 643819-4 is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must remain identical for functional interchangeability:

Critical Parameters (Must Match Exactly):

• Connector type: Receptacle
• Number of positions: 4
• Pitch: 0.156" (3.96mm)
• Series designation: MTA-156
• Cable termination method: IDC
• Wire gauge: 22 AWG
• Contact type: Female Socket
• Mounting configuration: Free Hanging (In-Line)
• Fastening mechanism: Locking Ramp
• Design features: Closed End with Polarizing Key

Non-Critical Parameters (May Vary):

• Contact finish material (Tin-Lead vs. Tin)
• Packaging configuration (Bulk vs. standard)
• RoHS compliance status
• Inventory levels

The substitute part 3-643819-4 maintains complete equivalence across all critical parameters while differing only in contact finish composition (Tin vs. Tin-Lead) and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection Criteria:

The 643819-4 and 3-643819-4 are functionally equivalent across all critical electrical and mechanical parameters. Selection between these parts should be based on the following factors:

RoHS Compliance Requirement:

• If the application requires ROHS3 compliance, the 3-643819-4 substitute part is the appropriate selection.
• If RoHS non-compliance is acceptable or required for legacy systems, the 643819-4 main part remains suitable.

Contact Finish Consideration:

• The 643819-4 features a tin-lead contact finish (80.0µin thickness).
• The 3-643819-4 features a tin contact finish (80.0µin thickness).
• Both finishes provide equivalent contact resistance and durability characteristics within the MTA-156 series specifications.

Inventory and Packaging:

• The 3-643819-4 is available in bulk packaging with higher inventory (3113 units) compared to the 643819-4 (1144 units).
• Packaging preference or supply chain requirements may influence part selection.

Regulatory and Compliance Status:

• Both parts carry identical ECCN (EAR99) and HTSUS (8536.69.8000) classifications.
• The 3-643819-4 carries undefined REACH status from the vendor, while the 643819-4 is REACH Affected.
• Applications subject to REACH regulations should evaluate the compliance documentation for the 3-643819-4 directly with TE Connectivity.

Frequently Asked Questions (FAQ)

Q: Can the 3-643819-4 be used as a direct replacement for the 643819-4 in existing designs?

A: Yes. The 3-643819-4 is functionally equivalent to the 643819-4 across all critical parameters including connector type, position count, pitch, termination method, wire gauge, and mounting configuration. The parts are mechanically and electrically interchangeable.

Q: What is the difference between the tin-lead finish on the 643819-4 and the tin finish on the 3-643819-4?

A: The 643819-4 uses a tin-lead contact finish while the 3-643819-4 uses a tin contact finish. Both finishes are applied at 80.0µin (2.03µm) thickness. The tin finish on the 3-643819-4 aligns with ROHS3 compliance requirements, eliminating lead content. Contact resistance and durability characteristics remain equivalent within MTA-156 series specifications.

Q: Which part should I select if my application requires RoHS compliance?

A: The 3-643819-4 is ROHS3 compliant and is the appropriate selection for applications with RoHS compliance requirements. The 643819-4 is RoHS non-compliant due to its tin-lead contact finish.

Q: Are there any differences in the IDC termination process between these two parts?

A: No. Both the 643819-4 and 3-643819-4 use identical IDC (Insulation Displacement Contact) termination methods for 22 AWG discrete or ribbon cable. The termination process, tooling, and cable preparation requirements are identical.

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

A: Yes. Both the 643819-4 and 3-643819-4 are designed to accept discrete or ribbon cable at 22 AWG wire gauge. The IDC termination method accommodates both cable types without modification.

Q: What is the pitch specification for these connectors?

A: Both connectors feature a 0.156" (3.96mm) pitch, which is the standard spacing for the MTA-156 series. This pitch is critical for mating with corresponding plug connectors and PCB layouts.

Q: Are these connectors polarized?

A: Yes. Both the 643819-4 and 3-643819-4 feature a polarizing key that prevents incorrect mating orientation. This design feature ensures proper connector alignment during assembly.

Q: What is the moisture sensitivity level (MSL) for these parts?

A: Both connectors carry an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts do not require special handling or storage conditions related to moisture exposure.

Q: Can I mix 643819-4 and 3-643819-4 parts in the same application or assembly?

A: Yes. Since both parts are functionally equivalent across all critical parameters, they can be used interchangeably within the same application or assembly without performance degradation or compatibility issues.

Q: What is the locking ramp fastening mechanism?

A: The locking ramp is the fastening mechanism that secures the connector to its mating plug. Both the 643819-4 and 3-643819-4 use identical locking ramp designs for the MTA-156 series, ensuring consistent mating force and retention.