TE Connectivity 640428-3 Rectangular Connector: Equivalent & Substitute Parts

Part Overview

The TE Connectivity 640428-3 is a 3-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 640428-3 is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and production requirements for legacy systems utilizing this connector configuration.

Substiute Parts

640428-3

TE Connectivity AMP ConnectorsIn Stock: 777640428-3 Datasheet

Current PartRFQ

3-640428-3

TE Connectivity AMP ConnectorsIn Stock: 156933-640428-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 640428-3 is determined by strict equivalence across the following critical parameters:

• Connector Series: MTA-156 (ensures mechanical and electrical compatibility with mating connectors)
• Number of Positions: 3 (exact pin count match required)
• Pitch: 0.156" (3.96mm) (determines physical spacing and mating interface)
• Connector Type: Receptacle (functional role in the assembly)
• Contact Type: Female Socket (electrical and mechanical interface specification)
• Wire Gauge: 22 AWG (cable compatibility)
• Cable Termination Method: IDC (termination process compatibility)
• Mounting Type: Free Hanging (In-Line) (installation configuration)
• Contact Finish Thickness: 80.0µin (2.03µm) (electrical performance specification)

The substitute part 3-640428-3 maintains equivalence across all critical parameters. The primary distinction is the contact finish material (tin versus tin-lead) and product status (active versus obsolete).

Parameter Comparison

Engineering Selection Recommendations

The 3-640428-3 is a direct functional equivalent to the 640428-3 across all critical electrical and mechanical parameters. Both connectors are MTA-156 series 3-position receptacles with identical pitch, contact configuration, wire gauge compatibility, and IDC termination method.

The 3-640428-3 is classified as active product status, ensuring ongoing availability and manufacturing support. The 640428-3 is obsolete, making the 3-640428-3 the appropriate selection for new designs and ongoing production.

The 3-640428-3 achieves ROHS3 compliance, whereas the 640428-3 is RoHS non-compliant. This distinction is significant for applications subject to RoHS regulatory requirements. The contact finish difference (tin versus tin-lead) reflects the RoHS compliance transition; both finishes maintain the specified 80.0µin (2.03µm) thickness and deliver equivalent electrical performance within the MTA-156 connector system.

Both parts share identical moisture sensitivity classification (MSL 1), export control designation (EAR99), and tariff classification (HTSUS 8536.69.8000).

Frequently Asked Questions (FAQ)

Q: Can the 3-640428-3 directly replace the 640428-3 in existing assemblies?

A: Yes. The 3-640428-3 maintains mechanical and electrical equivalence across all critical parameters: connector series, position count, pitch, contact type, wire gauge, termination method, and mounting configuration. Both connectors are MTA-156 series receptacles with identical 0.156" pitch and 22 AWG IDC termination capability.

Q: What is the significance of the contact finish difference between tin-lead and tin?

A: The contact finish material reflects RoHS compliance status. The 640428-3 uses tin-lead finish and is RoHS non-compliant. The 3-640428-3 uses tin finish and is ROHS3 compliant. Both finishes are applied to the same 80.0µin (2.03µm) thickness specification and deliver equivalent electrical performance within the MTA-156 system.

Q: Why is the 640428-3 listed as obsolete?

A: The 640428-3 has been superseded by the 3-640428-3, which is the active equivalent part. The 3-640428-3 provides the same functional capability with current RoHS3 compliance and ongoing manufacturing support.

Q: Are there packaging differences between these parts?

A: The 640428-3 packaging specification is not provided in the available data. The 3-640428-3 is supplied in bulk packaging. Confirm packaging requirements with your procurement specification.

Q: What is the MSL rating for these connectors?

A: Both the 640428-3 and 3-640428-3 carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage or handling.

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

A: Yes. Both the 640428-3 and 3-640428-3 support discrete or ribbon cable termination via IDC method at 22 AWG wire gauge.