TE Connectivity 643820-8 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 643820-8 is an 8-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 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 874 pieces in stock inventory.

Identification of equivalent and substitute parts is necessary to support procurement flexibility, manage supply chain continuity, and accommodate specific compliance or packaging requirements across different applications and manufacturing environments.

Substiute Parts

643820-8

TE Connectivity AMP ConnectorsIn Stock: 906643820-8 Datasheet

Current PartRFQ

3-643820-8

TE Connectivity AMP ConnectorsIn Stock: 11613-643820-8 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the main part (643820-8) and the identified equivalent (3-643820-8) is valid based on the following criteria:

Matching Parameters (Substitution Basis):

• Connector type: Receptacle
• Number of positions: 8
• Pitch: 0.156" (3.96mm)
• Contact type: Female Socket
• Cable termination: IDC
• Wire gauge: 24 AWG
• Mounting type: Free Hanging (In-Line)
• Fastening type: Locking Ramp
• Series: MTA-156
• Contact finish thickness: 80.0µin (2.03µm)
• Color: White
• Features: Closed End, Polarizing Key

Differentiating Parameters:

• Contact finish material: Tin-Lead (643820-8) versus Tin (3-643820-8)
• RoHS compliance status: Non-compliant (643820-8) versus ROHS3 Compliant (3-643820-8)
• Packaging: Not specified (643820-8) versus Bulk (3-643820-8)
• REACH status: REACH Affected (643820-8) versus Vendor Undefined (3-643820-8)

These parts share identical mechanical and electrical interface specifications, making them functionally interchangeable in applications where the contact finish material and regulatory compliance status are compatible with system requirements.

Parameter Comparison

Engineering Selection Recommendations

For RoHS3 Compliant Applications: Select part 3-643820-8. This substitute meets ROHS3 compliance requirements while maintaining identical mechanical and electrical interface specifications. The tin contact finish is suitable for standard industrial and commercial applications.

For Legacy or Non-Compliant System Requirements: The original part 643820-8 with tin-lead contact finish remains available with 874 units in current inventory. This part is appropriate for applications where RoHS compliance is not mandated or where tin-lead contact characteristics are specifically required.

For Bulk Packaging Requirements: Part 3-643820-8 is supplied in bulk packaging, offering advantages for high-volume manufacturing and assembly operations.

Both parts are active products from TE Connectivity with identical MTA-156 series specifications, ensuring design continuity and mechanical interchangeability in connector mating applications.

Frequently Asked Questions (FAQ)

Q: Are the 643820-8 and 3-643820-8 mechanically interchangeable?

A: Yes. Both parts share identical pitch (0.156"), number of positions (8), mounting type (free hanging in-line), fastening mechanism (locking ramp), and connector geometry. They mate with the same plug connectors and occupy identical PCB or panel footprints.

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

A: The contact finish material affects corrosion resistance and solderability characteristics. Tin-lead (643820-8) provides specific performance in legacy systems. Tin (3-643820-8) is the modern standard and meets RoHS3 requirements. Both finishes at 80.0µin thickness support equivalent electrical performance in IDC termination applications.

Q: Can I substitute 3-643820-8 for 643820-8 in an existing design?

A: Substitution is mechanically and electrically valid. Verify that your application does not specifically require tin-lead contact properties or non-compliant status. If RoHS compliance is required or preferred, 3-643820-8 is the appropriate selection.

Q: What does IDC termination mean?

A: IDC (Insulation Displacement Contact) termination allows direct connection of 24 AWG discrete or ribbon cable without stripping insulation. The connector contacts pierce the cable insulation during mating, creating electrical connection. Both parts support this termination method.

Q: Are there inventory differences between these parts?

A: Yes. The main part 643820-8 has 874 units in stock. The substitute 3-643820-8 has 1104 units in stock. Both are active products with current availability.

Q: What is the polarizing key feature?

A: The polarizing key is a mechanical feature that ensures correct orientation during mating, preventing reversed or incorrect connector insertion. Both parts include this feature.

Q: Does moisture sensitivity affect storage or handling?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard dry storage conditions are appropriate for both parts.