TE Connectivity 643820-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 643820-2 is a 2-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 24 AWG discrete or ribbon cable. This connector features tin-lead contact finish, closed-end design with polarizing key, and free-hanging in-line mounting configuration.

The 643820-2 is classified as obsolete. Identification of equivalent and substitute parts is necessary to support ongoing maintenance, repair, and production requirements for systems utilizing this connector type.

Substiute Parts

643820-2

TE Connectivity AMP ConnectorsIn Stock: 1080643820-2 Datasheet

Current PartRFQ

3-643820-2

TE Connectivity AMP ConnectorsIn Stock: 9063-643820-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 643820-2 is determined by strict equivalence across the following critical parameters:

Electrical and Mechanical Compatibility Requirements:

• Connector type (Receptacle)
• Number of positions (2)
• Pitch specification (0.156" / 3.96mm)
• Number of rows (1)
• Contact type (Female Socket)
• Cable termination method (IDC)
• Wire gauge compatibility (24 AWG)
• Wire type support (Discrete or Ribbon Cable)
• Mounting configuration (Free Hanging In-Line)
• Fastening mechanism (Locking Ramp)
• Physical features (Closed End, Polarizing Key)
• Contact finish thickness (80.0µin / 2.03µm)

The substitute part 3-643820-2 maintains full equivalence across all mechanical and electrical parameters. The primary distinction between the main part and its substitute is the contact finish material and product status classification.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Active Production:

The substitute part 3-643820-2 is the appropriate selection for new applications and ongoing production. This part maintains active product status with TE Connectivity and carries ROHS3 compliance certification, meeting current regulatory requirements for electronic component manufacturing and distribution.

For Legacy System Support:

The original 643820-2 remains available in inventory (975 units) for direct replacement in existing systems where tin-lead contact finish is specified or required. The obsolete status of the 643820-2 indicates that TE Connectivity no longer manufactures this variant; however, existing stock supports continued maintenance and repair operations.

Compliance Considerations:

The 643820-2 is RoHS non-compliant due to its tin-lead contact finish. The 3-643820-2 substitute achieves ROHS3 compliance through tin contact finish while maintaining identical mechanical and electrical specifications. Both parts carry EAR99 export classification and are subject to REACH regulations.

Interchangeability:

The 3-643820-2 is mechanically and electrically interchangeable with the 643820-2 across all specified parameters. Contact finish material difference (tin-lead versus tin) does not affect connector function, mating characteristics, or performance in standard applications.

Frequently Asked Questions (FAQ)

Q: Can the 3-643820-2 directly replace the 643820-2 in existing assemblies?

A: Yes. The 3-643820-2 is mechanically and electrically equivalent to the 643820-2. Both connectors share identical pitch (0.156"), position count (2), contact type (female socket), termination method (IDC), wire gauge (24 AWG), and mounting configuration (free-hanging in-line). The contact finish difference (tin versus tin-lead) does not affect connector mating or electrical performance.

Q: What is the significance of the contact finish difference between these parts?

A: The 643820-2 features tin-lead contact finish and is RoHS non-compliant. The 3-643820-2 features tin contact finish and is ROHS3 compliant. Both finishes provide equivalent electrical conductivity and contact reliability at the specified contact finish thickness of 80.0µin (2.03µm). The tin finish in the 3-643820-2 meets current environmental and regulatory standards for component manufacturing.

Q: Why is the 643820-2 classified as obsolete?

A: The 643820-2 is obsolete because TE Connectivity has discontinued manufacturing this specific variant. The 3-643820-2 represents the current active production equivalent, incorporating modern compliance standards while maintaining full mechanical and electrical compatibility.

Q: Are there packaging differences between these parts?

A: The 643820-2 packaging specification is not provided in the technical data. The 3-643820-2 is supplied in bulk packaging. For specific packaging requirements, consult the respective product datasheets or contact the component supplier.

Q: What is the Moisture Sensitivity Level for these connectors?

A: Both the 643820-2 and 3-643820-2 carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions. These connectors do not require special moisture control during storage, handling, or assembly.

Q: Can these connectors accommodate both discrete and ribbon cable?

A: Yes. Both the 643820-2 and 3-643820-2 support discrete or ribbon cable termination via IDC (Insulation Displacement Contact) method at 24 AWG wire gauge.