TE Connectivity 640428-7 Rectangular Connector: Equivalent & Substitute Parts

Part Overview

The TE Connectivity 640428-7 is a 7-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 part is currently active in production with 1079 pieces in stock inventory.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across connector specifications. Alternative part numbers may be necessary due to packaging requirements, compliance status changes, or inventory availability while preserving functional compatibility in the application circuit.

Substiute Parts

640428-7

TE Connectivity AMP ConnectorsIn Stock: 1155640428-7 Datasheet

Current PartRFQ

3-640428-7

TE Connectivity AMP ConnectorsIn Stock: 14793-640428-7 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 640428-7 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Parameters:

• Connector type (Receptacle)
• Number of positions (7)
• Contact type (Female Socket)
• Pitch (0.156" / 3.96mm)
• Cable termination method (IDC)
• Wire gauge (22 AWG)
• Wire type (Discrete or Ribbon Cable)
• Contact finish thickness (80.0µin / 2.03µm)

Mechanical Compatibility Parameters:

• Mounting type (Free Hanging In-Line)
• Fastening type (Locking Ramp)
• Features (Closed End)
• Color (Red)
• Series designation (MTA-156)

The substitute part 3-640428-7 maintains all electrical and mechanical parameters identical to the main part. Differences exist only in contact finish material (Tin versus Tin-Lead), packaging format (Bulk versus standard), RoHS compliance status, and inventory levels. These differences do not affect functional compatibility in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the 640428-7 and 3-640428-7 are active production parts from TE Connectivity AMP Connectors within the MTA-156 series. Selection between these parts is determined by application compliance requirements and packaging specifications.

640428-7 Selection Criteria:

• Applications where tin-lead contact finish is specified or required
• Environments where RoHS non-compliance is acceptable
• Standard packaging requirements

3-640428-7 Selection Criteria:

• Applications requiring RoHS compliance
• Tin contact finish specifications
• Bulk packaging requirements
• Higher inventory availability (1459 pieces versus 1079 pieces)

Both parts maintain identical electrical and mechanical specifications, including connector type, position count, pitch, termination method, wire gauge, mounting configuration, and fastening mechanism. The contact finish material difference (tin-lead versus tin) and RoHS compliance status are the primary differentiators. Selection should be based on regulatory requirements and material specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can the 3-640428-7 be used as a direct replacement for the 640428-7?

A: Yes. Both parts are functionally equivalent across all electrical and mechanical parameters including connector type, position count, pitch, IDC termination, wire gauge, mounting type, and fastening mechanism. The primary differences are contact finish material (tin versus tin-lead) and RoHS compliance status.

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

A: The 640428-7 features tin-lead contact finish while the 3-640428-7 features tin contact finish. Both maintain the same contact finish thickness of 80.0µin (2.03µm). Selection between these finishes depends on application requirements and regulatory compliance mandates.

Q: Are there packaging differences between these parts?

A: Yes. The 640428-7 is supplied in standard packaging while the 3-640428-7 is supplied in bulk packaging. Both parts are identical in electrical and mechanical specifications.

Q: Does RoHS compliance affect the functional performance of these connectors?

A: RoHS compliance status reflects material composition and manufacturing processes but does not alter the electrical or mechanical performance characteristics of the connector. Selection should be based on application regulatory requirements.

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

A: Yes. Both the 640428-7 and 3-640428-7 support discrete or ribbon cable termination via IDC at 22 AWG wire gauge.

Q: What is the pitch specification and why is it important?

A: The pitch is 0.156" (3.96mm), which defines the center-to-center spacing between connector positions. This specification must match the mating connector and PCB layout to ensure proper alignment and connection.

Q: Are these connectors suitable for in-line applications?

A: Yes. Both parts feature free-hanging in-line mounting with locking ramp fastening, making them suitable for in-line cable termination applications.