TE Connectivity 1-643816-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 1-643816-2 is a 12-position rectangular receptacle connector from the MTA-100 series, designed for IDC (Insulation Displacement Contact) termination with 28 AWG discrete or ribbon cable. This connector features tin-lead contact finish and is classified as a closed-end receptacle with a 0.100" (2.54mm) pitch in a single-row configuration. The part is currently active in production with 763 units in stock.

Identification of equivalent and substitute parts is necessary to support procurement flexibility, manage supply chain continuity, and accommodate design revisions that may require alternative contact finishes or compliance certifications while maintaining functional compatibility.

Substiute Parts

1-643816-2

TE Connectivity AMP ConnectorsIn Stock: 7921-643816-2 Datasheet

Current PartRFQ

4-643816-2

TE Connectivity AMP ConnectorsIn Stock: 12484-643816-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the main part (1-643816-2) and equivalent part (4-643816-2) is permissible based on the following criteria:

Identical Parameters:

• Connector type, contact type, and receptacle configuration
• Position count (12 positions) and pitch (0.100")
• Single-row layout with identical mounting and fastening specifications
• IDC termination method and 28 AWG wire gauge compatibility
• Closed-end design and MTA-100 series classification
• Contact finish thickness (80.0µin / 2.03µm)
• Moisture sensitivity level (MSL 1 – Unlimited)

Variable Parameters Permitting Substitution:

• Contact finish material: Tin-Lead (1-643816-2) versus Tin (4-643816-2)
• RoHS compliance status: Non-compliant (1-643816-2) versus ROHS3 Compliant (4-643816-2)
• Packaging configuration: Standard versus Bulk

The substitution is valid because contact finish material and RoHS compliance do not affect mechanical fit, electrical performance within the specified wire gauge and pitch parameters, or functional compatibility in IDC termination applications.

Parameter Comparison

Engineering Selection Recommendations

Selection Criteria Based on Compliance and Product Status:

Both parts are active products from TE Connectivity's MTA-100 series and are functionally equivalent for IDC termination applications with 28 AWG cable at 0.100" pitch.

For applications requiring RoHS3 compliance: Select part 4-643816-2. This part meets ROHS3 certification requirements and is suitable for designs subject to RoHS directives or customer specifications mandating lead-free contact finishes.

For applications with no RoHS compliance requirement: Either part is acceptable. Part 1-643816-2 (tin-lead finish) or part 4-643816-2 (tin finish) may be selected based on procurement availability and cost considerations.

Inventory Consideration: Part 4-643816-2 has higher stock availability (1228 units) compared to part 1-643816-2 (763 units), supporting supply chain continuity for high-volume procurement.

Both parts share identical mechanical and electrical specifications, ensuring direct interchangeability in connector mating, cable termination, and mounting applications.

Frequently Asked Questions (FAQ)

Q: Can part 4-643816-2 be used as a direct replacement for 1-643816-2 in existing designs?

A: Yes. Both parts are mechanically and electrically identical 12-position MTA-100 receptacles with IDC termination for 28 AWG cable. The primary difference is contact finish material (tin-lead versus tin) and RoHS compliance status. This difference does not affect connector fit, mating performance, or electrical function.

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

A: Tin-lead (1-643816-2) is a traditional contact finish. Tin (4-643816-2) is a lead-free alternative that meets ROHS3 compliance requirements. Both finishes provide equivalent electrical conductivity and contact resistance at the specified thickness of 80.0µin (2.03µm).

Q: Does the RoHS compliance difference affect electrical performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both parts deliver identical electrical characteristics for IDC termination and signal transmission applications.

Q: Are the packaging differences significant for component selection?

A: Packaging differences (standard versus bulk) affect logistics and inventory management but do not impact connector functionality or compatibility. Select based on procurement quantity requirements and supply chain preferences.

Q: Can these connectors be used with ribbon cable and discrete wire interchangeably?

A: Yes. Both parts support IDC termination with discrete or ribbon cable at 28 AWG. The IDC contact design accommodates both cable types without modification.

Q: What is the pitch specification and why is it critical for substitution?

A: Pitch is the center-to-center distance between adjacent contacts, specified as 0.100" (2.54mm) for both parts. Pitch is critical because it determines physical compatibility with mating connectors and PCB layouts. Both parts share identical pitch, ensuring direct substitution.

Q: Is the locking ramp fastening type the same on both parts?

A: Yes. Both parts use locking ramp fastening, providing identical mechanical retention and mating security. This ensures consistent assembly and reliability across both part numbers.