TE Connectivity 640428-4 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 640428-4 is a 4-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 tin-lead contact finish, a closed-end design, and free-hanging in-line mounting with locking ramp fastening.

The 640428-4 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and field service requirements for systems utilizing this connector type.

Substiute Parts

640428-4

TE Connectivity AMP ConnectorsIn Stock: 1006640428-4 Datasheet

Current PartRFQ

3-640428-4

TE Connectivity AMP ConnectorsIn Stock: 245013-640428-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 640428-4 is determined by strict equivalence across the following critical parameters:

• Connector Configuration: Receptacle type with 4 positions at 0.156" (3.96mm) pitch
• Contact System: Female socket contacts with IDC termination capability
• Cable Compatibility: 22 AWG wire gauge for discrete or ribbon cable
• Mechanical Interface: Free-hanging in-line mounting with locking ramp fastening and closed-end design
• Electrical Performance: Contact finish thickness of 80.0µin (2.03µm)
• Environmental Tolerance: MSL 1 rating (unlimited moisture sensitivity)

The substitute part 3-640428-4 maintains identical mechanical and electrical specifications across all these parameters. The primary differences are contact finish composition (tin versus tin-lead) and product status (active versus obsolete), with corresponding changes in RoHS compliance and REACH status.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Active Production Programs: The 3-640428-4 is the appropriate selection. This part is active in production status, RoHS compliant, and REACH unaffected, meeting current regulatory requirements for commercial and industrial applications. Superior inventory availability (24,483 units) ensures supply chain continuity.

For Legacy System Support and Field Service: The 640428-4 remains functionally equivalent for applications where existing tin-lead contact finish specifications are established or where RoHS exemptions apply. However, the obsolete status and limited inventory (949 units) necessitate transition planning to the 3-640428-4 for long-term sustainability.

Compliance Considerations: The transition from tin-lead to tin contact finish in the 3-640428-4 eliminates RoHS non-compliance and REACH-affected status. Both parts maintain identical electrical and mechanical performance across all specified parameters, including contact finish thickness and MSL rating.

Frequently Asked Questions (FAQ)

Q: Are the 640428-4 and 3-640428-4 mechanically interchangeable?

A: Yes. Both connectors share identical mechanical specifications: 4-position receptacle configuration, 0.156" (3.96mm) pitch, free-hanging in-line mounting, locking ramp fastening, and closed-end design. Physical dimensions and mating interfaces are equivalent.

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

A: Both contact finishes provide equivalent electrical performance and contact resistance at the specified 80.0µin (2.03µm) thickness. The primary distinction is regulatory compliance: tin-lead finish is RoHS non-compliant and REACH-affected, while tin finish is RoHS compliant and REACH-unaffected.

Q: Can the 3-640428-4 be used as a direct replacement in existing assemblies designed for the 640428-4?

A: Yes. The 3-640428-4 is a direct substitute. All electrical, mechanical, and environmental specifications are identical. The connector will function identically in existing cable assemblies and mating applications.

Q: Why is the 640428-4 classified as obsolete?

A: The obsolete status reflects TE Connectivity's transition to RoHS-compliant and REACH-unaffected product variants. The 3-640428-4 represents the active production equivalent with updated regulatory compliance.

Q: What is the significance of the MSL 1 rating for both connectors?

A: MSL 1 (Unlimited) indicates these connectors have no moisture sensitivity limitations. They do not require special storage, handling, or baking procedures prior to assembly or deployment.

Q: Are there packaging differences between these parts?

A: The 640428-4 packaging is not specified in available documentation. The 3-640428-4 is supplied in bulk packaging. Confirm specific packaging requirements with procurement specifications for your application.

Q: Which part should be specified for new designs?

A: Specify the 3-640428-4 for all new designs. This part is active in production, maintains full regulatory compliance, and has superior inventory availability.