TE Connectivity 643817-4 Rectangular Connector: Equivalent & Substitute Parts

Part Overview

The TE Connectivity 643817-4 is a 4-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 18 AWG discrete or ribbon cable. This connector features tin-lead contact finish, a polarizing key, and closed-end design for secure mating. The part is currently active in production with 981 pieces in stock.

Substitute parts are identified to address specific application requirements, including RoHS compliance status, contact finish specifications, and packaging configurations. Alternative part numbers within the same series maintain electrical and mechanical compatibility while offering different material certifications and availability options.

Substiute Parts

643817-4

TE Connectivity AMP ConnectorsIn Stock: 1079643817-4 Datasheet

Current PartRFQ

3-643817-4

TE Connectivity AMP ConnectorsIn Stock: 25023-643817-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the main part 643817-4 and the identified equivalent 3-643817-4 is based on strict electrical and mechanical compatibility within the MTA-156 series. Both parts maintain identical specifications across the following critical parameters:

Electrical Compatibility Parameters:

• 4-position configuration
• 0.156" (3.96mm) pitch
• Single row layout
• Female socket contact type
• IDC termination method
• 18 AWG wire gauge capacity
• Discrete or ribbon cable compatibility

Mechanical Compatibility Parameters:

• Free hanging in-line mounting
• Locking ramp fastening mechanism
• Closed end design with polarizing key
• Orange housing color
• 80.0µin (2.03µm) contact finish thickness

Regulatory and Compliance Differences: The primary distinction between these parts lies in contact finish material and RoHS compliance status. The main part 643817-4 features tin-lead contact finish and is RoHS non-compliant. The substitute part 3-643817-4 features tin contact finish and is RoHS3 compliant. Both parts share identical mechanical dimensions, mating interfaces, and functional performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

For RoHS3 Compliant Applications: Select part 3-643817-4. This substitute maintains full electrical and mechanical compatibility with the main part while meeting RoHS3 compliance requirements. The tin contact finish eliminates lead content while preserving the 80.0µin (2.03µm) finish thickness specification.

For Legacy or Non-Regulated Applications: Either part 643817-4 or 3-643817-4 is suitable. The tin-lead contact finish of 643817-4 offers established performance in applications without RoHS restrictions.

For High-Volume Requirements: Part 3-643817-4 offers greater inventory availability at 2400 pieces compared to 981 pieces for the main part, with bulk packaging configuration.

Both parts are active products with identical mechanical interfaces, mating dimensions, and functional performance. Selection between them depends on regulatory compliance requirements and packaging needs rather than electrical or mechanical constraints.

Frequently Asked Questions (FAQ)

Q: Are these connectors mechanically interchangeable?

A: Yes. Both the 643817-4 and 3-643817-4 share identical mechanical dimensions, pitch spacing (0.156"), mounting configuration, and mating interfaces. They are direct mechanical substitutes within the MTA-156 series.

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

A: The main part 643817-4 uses tin-lead contact finish, while the substitute 3-643817-4 uses tin finish. Both maintain the same 80.0µin (2.03µm) thickness specification. The tin finish eliminates lead content to meet RoHS3 compliance requirements.

Q: Can I use the RoHS3 compliant part in a non-regulated application?

A: Yes. The 3-643817-4 substitute is fully compatible with all applications designed for the 643817-4. RoHS3 compliance is a superset requirement and does not restrict use in non-regulated applications.

Q: Are the IDC termination specifications identical?

A: Yes. Both parts support identical IDC termination for 18 AWG discrete or ribbon cable. The termination force, contact geometry, and cable compatibility are unchanged between the two parts.

Q: What is the significance of the packaging difference?

A: The main part 643817-4 uses standard packaging, while the substitute 3-643817-4 is supplied in bulk packaging. This affects order quantities and handling but does not impact connector performance or compatibility.

Q: Do both parts support the same wire gauges?

A: Yes. Both connectors are rated for 18 AWG wire gauge and support discrete or ribbon cable configurations identically.

Q: Are there any environmental or moisture sensitivity differences?

A: No. Both parts share identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for either connector.

Q: Which part should I select for new designs?

A: For new designs, part 3-643817-4 is recommended due to RoHS3 compliance status and higher inventory availability. This part meets current regulatory standards while maintaining full compatibility with existing MTA-156 series infrastructure.