TE Connectivity 640427-3 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 640427-3 is a 3-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 20 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 640427-3 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

640427-3

TE Connectivity AMP ConnectorsIn Stock: 1243640427-3 Datasheet

Current PartRFQ

3-640427-3

TE Connectivity AMP ConnectorsIn Stock: 202453-640427-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 640427-3 is determined by strict equivalence across the following critical parameters:

Mechanical Compatibility:

• Connector type (rectangular receptacle)
• Number of positions (3)
• Pitch spacing (0.156")
• Mounting configuration (free hanging, in-line)
• Fastening mechanism (locking ramp)

Electrical & Termination Compatibility:

• Contact type (female socket)
• Cable termination method (IDC)
• Wire gauge capacity (20 AWG)
• Number of rows (1)

Physical Characteristics:

• Closed-end design
• Series designation (MTA-156)

The substitute part 3-640427-3 maintains identical mechanical and electrical specifications across all critical parameters, ensuring direct functional equivalence for connector mating, cable termination, and mounting applications.

Parameter Comparison

Engineering Selection Recommendations

The 3-640427-3 serves as the direct functional equivalent to the obsolete 640427-3. Both connectors share identical mechanical and electrical specifications, ensuring compatibility in applications requiring 3-position MTA-156 rectangular receptacle connectors with IDC termination for 20 AWG cable.

Product Status Consideration: The 640427-3 is classified as obsolete, while the 3-640427-3 maintains active product status with significantly higher inventory availability (20,167 pieces versus 1,137 pieces). This availability differential supports long-term supply chain continuity for new production and field service applications.

Compliance Differentiation: The 640427-3 carries RoHS non-compliant status with tin-lead contact finish. The 3-640427-3 is RoHS compliant with tin contact finish. For applications subject to RoHS regulatory requirements or environmental compliance mandates, the 3-640427-3 is the appropriate selection. For legacy systems requiring exact material composition matching, the 640427-3 remains available while inventory permits.

Both parts carry identical ECCN (EAR99) and HTSUS (8536.69.8000) classifications, indicating equivalent export control and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Can the 3-640427-3 directly replace the 640427-3 in existing assemblies?

A: Yes. The 3-640427-3 maintains identical mechanical and electrical specifications across all critical parameters: 3-position configuration, 0.156" pitch, IDC termination, 20 AWG wire gauge capacity, free-hanging in-line mounting, and locking ramp fastening. Connector mating, cable termination, and mounting compatibility are fully preserved.

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

A: The 640427-3 features tin-lead contact finish (80.0µin thickness), while the 3-640427-3 features tin contact finish (80.0µin thickness). Both maintain identical contact finish thickness. The tin-lead composition in the 640427-3 results in RoHS non-compliant status, whereas the tin finish in the 3-640427-3 achieves RoHS compliance. Contact finish thickness and electrical performance characteristics remain equivalent.

Q: Are there packaging differences between these parts?

A: The 640427-3 packaging specification is not provided in available documentation. The 3-640427-3 is supplied in bulk packaging. For specific packaging requirements, consult component procurement specifications or contact the manufacturer directly.

Q: Why is the 640427-3 classified as obsolete?

A: Obsolescence classification reflects the manufacturer's discontinuation of active production and support for this part number. The 3-640427-3 represents the current active equivalent, maintaining identical functional specifications while providing improved regulatory compliance and supply chain availability.

Q: Can these connectors be used interchangeably in new product designs?

A: The 3-640427-3 is the appropriate selection for new product designs. It provides identical functional performance to the 640427-3 while maintaining active product status, RoHS compliance, and superior inventory availability. The 640427-3 should be reserved for legacy system maintenance where exact material composition matching is required.

Q: What applications are these connectors suitable for?

A: These 3-position MTA-156 rectangular receptacle connectors are designed for discrete or ribbon cable termination using IDC technology at 20 AWG wire gauge. The free-hanging in-line mounting and locking ramp fastening support applications requiring secure, field-terminable connections without additional mounting hardware.