TE Connectivity 640427-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 640427-2 is a 2-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 and is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for ongoing production and field service applications.

Substiute Parts

640427-2

TE Connectivity AMP ConnectorsIn Stock: 1229640427-2 Datasheet

Current PartRFQ

3-640427-2

TE Connectivity AMP ConnectorsIn Stock: 791743-640427-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 640427-2 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Connector type (Rectangular Receptacle)
• Number of positions (2)
• Contact type (Female Socket)
• Pitch specification (0.156" / 3.96mm)
• Wire gauge compatibility (20 AWG)
• Cable termination method (IDC)

Mechanical Parameters:

• Number of rows (1)
• Mounting type (Free Hanging In-Line)
• Fastening type (Locking Ramp)
• Closed end feature
• Contact finish thickness (80.0µin / 2.03µm)

Environmental & Compliance Parameters:

• Moisture Sensitivity Level (MSL 1 - Unlimited)
• Series designation (MTA-156)

The substitute part 3-640427-2 maintains complete equivalence across all electrical, mechanical, and environmental parameters. The primary distinction is the contact finish composition and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 3-640427-2 provides direct functional equivalence to the obsolete 640427-2 across all electrical and mechanical specifications. Selection between these parts is determined by regulatory and compliance requirements:

For RoHS-compliant applications: The 3-640427-2 substitute part is required. This part carries active product status and meets RoHS compliance standards through its tin contact finish composition, eliminating lead content present in the original tin-lead specification.

For legacy or non-RoHS-regulated applications: The 640427-2 original part remains functionally equivalent. However, the substitute 3-640427-2 is recommended due to its active product status and superior long-term availability, despite the contact finish material change from tin-lead to tin.

Availability consideration: The 3-640427-2 substitute maintains significantly higher inventory levels (79,164 pieces) compared to the original part (1,167 pieces), supporting sustained supply chain reliability.

Both parts share identical electrical performance, mechanical compatibility, and environmental ratings within the MTA-156 series specification.

Frequently Asked Questions (FAQ)

Q: Can the 3-640427-2 substitute directly replace the 640427-2 in existing designs?

A: Yes. The 3-640427-2 maintains complete electrical and mechanical equivalence across all critical parameters including connector type, position count, pitch, contact type, wire gauge, termination method, and mounting configuration. Both parts are MTA-156 series receptacles with identical 0.156" pitch and 20 AWG IDC termination capability.

Q: What is the difference between the tin-lead finish of 640427-2 and the tin finish of 3-640427-2?

A: The contact finish composition differs between the two parts. The 640427-2 uses tin-lead plating, while the 3-640427-2 uses tin plating. Both maintain the same contact finish thickness of 80.0µin (2.03µm). The tin finish of the substitute part eliminates lead content, enabling RoHS compliance.

Q: Why is the 640427-2 classified as obsolete?

A: The 640427-2 is designated obsolete due to its tin-lead contact finish composition, which does not meet current RoHS regulatory requirements. The 3-640427-2 represents the active product line continuation with equivalent functionality and RoHS-compliant materials.

Q: Are there any compatibility issues when substituting 3-640427-2 for 640427-2?

A: No compatibility issues exist. Both parts are identical in electrical and mechanical specifications. They share the same series designation (MTA-156), pitch (0.156"), position count (2), contact type (female socket), and IDC termination method for 20 AWG cable.

Q: What is the packaging difference between these parts?

A: The 640427-2 is supplied in standard packaging, while the 3-640427-2 is supplied in bulk packaging. This packaging distinction does not affect electrical or mechanical performance.

Q: Can the 3-640427-2 be used in applications requiring RoHS compliance?

A: Yes. The 3-640427-2 carries RoHS Compliant status, making it suitable for all RoHS-regulated applications. The original 640427-2 is RoHS non-compliant due to its tin-lead contact finish.

Q: Are both parts rated for the same moisture sensitivity level?

A: Yes. Both the 640427-2 and 3-640427-2 carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.