TE Connectivity 643819-7 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 643819-7 is a 7-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 805 units in stock. Substitute parts are identified to address inventory availability, compliance requirements, or packaging preferences while maintaining functional equivalence.

Substiute Parts

643819-7

TE Connectivity AMP ConnectorsIn Stock: 878643819-7 Datasheet

Current PartRFQ

3-643819-7

TE Connectivity AMP ConnectorsIn Stock: 19143-643819-7 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the main part 643819-7 and the identified equivalent 3-643819-7 is based on strict electrical and mechanical parameter matching within the MTA-156 rectangular connector family. Both parts maintain identical specifications across all critical parameters: 7-position receptacle configuration, 0.156" pitch, IDC termination for 22 AWG cable, female socket contacts, free-hanging in-line mounting, locking ramp fastening, and closed-end design with polarizing key.

The primary difference between these parts is the contact finish specification: the main part uses tin-lead plating while the substitute uses tin plating. Both finishes are applied at 80.0µin (2.03µm) thickness and provide equivalent electrical performance and reliability for IDC applications. The substitute part 3-643819-7 achieves RoHS3 compliance, whereas the main part 643819-7 is RoHS non-compliant. This distinction is significant for applications subject to RoHS regulatory requirements.

Substitution is valid when the following parameters are matched:

• Connector type, position count, and pitch
• IDC termination method and 22 AWG wire gauge compatibility
• Mounting configuration and fastening mechanism
• Closed-end design with polarizing key features
• Contact finish thickness and electrical performance

Parameter Comparison

Engineering Selection Recommendations

Selection between the main part 643819-7 and substitute 3-643819-7 is determined by regulatory compliance and application requirements.

Use 643819-7 (Main Part) when:

• RoHS compliance is not a requirement for the application
• Tin-lead contact finish is specified in design documentation
• Existing inventory or supply chain preference favors this part number

Use 3-643819-7 (Substitute) when:

• RoHS3 compliance is required by regulatory standards or customer specifications
• Tin contact finish meets application electrical and environmental requirements
• Higher inventory availability (1887 units) supports production scheduling
• Bulk packaging format aligns with procurement and assembly processes

Both parts are active products from TE Connectivity AMP Connectors and maintain identical mechanical and electrical performance across all critical connector parameters. The contact finish difference (tin-lead versus tin) does not affect functional compatibility in IDC termination applications. Selection should be based on compliance obligations and supply chain considerations rather than technical performance factors.

Frequently Asked Questions (FAQ)

Q: Are 643819-7 and 3-643819-7 mechanically interchangeable?

A: Yes. Both parts are 7-position MTA-156 series receptacle connectors with identical pitch (0.156"), mounting configuration (free-hanging in-line), fastening mechanism (locking ramp), and IDC termination design. They accept the same mating plugs and ribbon or discrete 22 AWG cables without modification.

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

A: The main part 643819-7 uses tin-lead plating while substitute 3-643819-7 uses tin plating. Both are applied at 80.0µin (2.03µm) thickness. Tin-lead finishes are traditional and widely used in legacy applications. Tin finishes are lead-free and support RoHS3 compliance. For IDC connector applications, both finishes provide equivalent electrical conductivity and contact reliability.

Q: Why is 3-643819-7 RoHS3 compliant while 643819-7 is not?

A: The difference stems from the contact finish material. The tin-lead finish in 643819-7 contains lead, which is restricted under RoHS regulations. The tin finish in 3-643819-7 is lead-free and complies with RoHS3 requirements. Applications subject to RoHS directives must use the compliant substitute part.

Q: Can I use 3-643819-7 as a direct replacement for 643819-7 in existing designs?

A: Yes, provided the application does not have explicit design constraints requiring tin-lead contact finish. The substitute part maintains all mechanical and electrical specifications. If the design documentation specifies tin-lead finish or does not restrict lead-free materials, substitution is valid.

Q: What is the significance of the packaging difference?

A: The main part 643819-7 has unspecified packaging, while 3-643819-7 is supplied in bulk packaging. Bulk packaging typically offers cost advantages for high-volume production but may require different handling and storage procedures. Packaging selection should align with assembly line requirements and inventory management practices.

Q: Are there any environmental or storage differences between these parts?

A: Both parts have identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no special moisture control requirements during storage or handling. Environmental performance and shelf life are equivalent between the two parts.

Q: Which part should I specify for new designs?

A: For new designs, specify 3-643819-7 if RoHS3 compliance is anticipated or required. This ensures regulatory alignment and future-proofs the design against evolving environmental standards. The higher inventory availability also supports production continuity.