TE Connectivity 643819-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 643819-2 is a 2-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 22 AWG discrete or ribbon cable. The connector features tin-lead contact finish, a polarizing key, and closed-end design for secure mating. This part is currently active in production with 661 pieces in stock.

Substitute parts are identified to provide alternatives based on matching electrical and mechanical specifications, particularly when inventory availability, packaging requirements, or compliance status necessitate component selection from equivalent options within the same connector family.

Substiute Parts

643819-2

TE Connectivity AMP ConnectorsIn Stock: 731643819-2 Datasheet

Current PartRFQ

3-643819-2

TE Connectivity AMP ConnectorsIn Stock: 50693-643819-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 643819-2 are identified based on strict equivalence across the following critical parameters:

Electrical Compatibility Parameters:

• Connector type (Rectangular Receptacle)
• Number of positions (2)
• Contact type (Female Socket)
• Pitch (0.156" / 3.96mm)
• Cable termination method (IDC)
• Wire gauge (22 AWG)
• Wire type (Discrete or Ribbon Cable)

Mechanical Compatibility Parameters:

• Mounting type (Free Hanging In-Line)
• Fastening type (Locking Ramp)
• Number of rows (1)
• Features (Closed End, Polarizing Key)
• Series designation (MTA-156)

Contact Finish Specifications:

• Contact finish thickness (80.0µin / 2.03µm)

Parts matching all these parameters are classified as direct substitutes. Variations in contact finish material (tin-lead versus tin), packaging format, or compliance status do not affect mechanical or electrical interchangeability when all core parameters remain identical.

Parameter Comparison

Engineering Selection Recommendations

643819-2 Selection Criteria: The 643819-2 is appropriate for applications where tin-lead contact finish is specified or required by design documentation. This part maintains active production status and is RoHS non-compliant, making it suitable for legacy systems or applications where RoHS compliance is not mandated. Current inventory of 661 pieces supports immediate availability for standard production volumes.

3-643819-2 Selection Criteria: The 3-643819-2 substitute part is ROHS3 compliant and features tin contact finish instead of tin-lead. This part is appropriate for applications requiring RoHS compliance or where tin finish is acceptable. The substitute offers significantly higher inventory availability at 5027 pieces and is supplied in bulk packaging format. Both parts share identical electrical and mechanical specifications, ensuring direct interchangeability in applications where contact finish material and compliance status do not impose design constraints.

Compliance Considerations: Selection between these parts should be based on project-level RoHS compliance requirements. The 643819-2 is suitable for non-RoHS applications, while the 3-643819-2 is required for designs mandating ROHS3 compliance. Contact finish material (tin-lead versus tin) does not affect connector performance when both parts meet the specified contact finish thickness of 80.0µin (2.03µm).

Frequently Asked Questions (FAQ)

Q: Are the 643819-2 and 3-643819-2 electrically interchangeable?

A: Yes. Both parts are electrically interchangeable. They share identical specifications for connector type, number of positions, pitch, contact type, wire gauge, and termination method. The difference in contact finish material (tin-lead versus tin) does not affect electrical performance when both meet the specified contact finish thickness of 80.0µin (2.03µm).

Q: What is the primary difference between these two parts?

A: The primary differences are contact finish material and RoHS compliance status. The 643819-2 features tin-lead finish and is RoHS non-compliant. The 3-643819-2 features tin finish and is ROHS3 compliant. Both parts are mechanically and electrically equivalent.

Q: Can I use the 3-643819-2 as a direct replacement for the 643819-2 in my design?

A: Direct replacement is possible if your application does not require tin-lead contact finish specifically and if RoHS compliance is acceptable or required. Verify that your design documentation does not mandate tin-lead finish or non-compliant status before substituting.

Q: What does IDC termination mean?

A: IDC (Insulation Displacement Contact) termination is a cable connection method where the connector contacts pierce the insulation of the wire without requiring prior stripping. Both parts support IDC termination for 22 AWG discrete or ribbon cable.

Q: Are these connectors suitable for ribbon cable applications?

A: Yes. Both parts support discrete or ribbon cable with 22 AWG wire gauge. The IDC termination method is compatible with standard ribbon cable configurations.

Q: What is the significance of the 0.156" pitch specification?

A: The 0.156" (3.96mm) pitch defines the center-to-center spacing between the two contact positions. This pitch is standardized within the MTA-156 series and ensures compatibility with mating connectors and PCB layouts designed for this spacing.

Q: Does packaging format affect connector performance?

A: No. Packaging format (bulk versus other formats) does not affect connector electrical or mechanical performance. Packaging selection is based on inventory management, handling, and supply chain requirements.

Q: What is the Moisture Sensitivity Level (MSL) rating?

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