TE Connectivity AMP Connectors 42531-1 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 42531-1 is a terminal connector female receptacle (socket) designed for 16-20 AWG wire gauges with crimp termination. This component belongs to the Shur-Plug series and features a non-insulated brass construction with a barrel diameter of 0.180" (4.57mm). The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

42531-1

TE Connectivity AMP ConnectorsIn Stock: 125642531-1 Datasheet

Current PartRFQ

42531-2

TE Connectivity AMP ConnectorsIn Stock: 30088742531-2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 42531-1 terminal connector is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part 42531-2 maintains identical specifications for terminal type, wire gauge range, barrel diameter, overall length, barrel length, insulation status, termination method, contact material, and insulation diameter. These parameters define the mechanical fit and electrical performance characteristics required for direct substitution within the Shur-Plug connector system.

The primary differentiators between the main part and its substitute are product status (obsolete versus active) and contact finish specification (unspecified versus tin-plated). The tin finish on the substitute part provides enhanced corrosion resistance and is compatible with the same mating interfaces and wire gauges as the original part.

Parameter Comparison

Engineering Selection Recommendations

The 42531-2 terminal connector is the direct active equivalent for the obsolete 42531-1. Selection of the 42531-2 is based on the following engineering criteria:

Product Status Alignment: The 42531-2 maintains active product status with TE Connectivity AMP Connectors, ensuring continued availability and manufacturing support. The 42531-1 is classified as obsolete and should be replaced in new designs and production applications.

Regulatory Compliance: Both parts meet RoHS requirements. The 42531-2 carries ROHS3 Compliant certification, representing the current regulatory standard. The 42531-2 also provides clarified REACH status (REACH Unaffected) compared to the vendor-undefined status of the 42531-1.

Mechanical and Electrical Equivalence: All critical parameters—terminal type, wire gauge range, barrel diameter, overall length, barrel length, insulation status, termination method, contact material, and insulation diameter—are identical between the two parts. This ensures direct mechanical fit and electrical performance compatibility within Shur-Plug connector assemblies.

Contact Finish Enhancement: The tin finish applied to the 42531-2 provides improved corrosion resistance compared to the unspecified finish of the 42531-1, offering enhanced reliability in field applications without compromising compatibility.

Supply Chain Continuity: The 42531-2 has significantly higher inventory availability (300,777 pieces) compared to the 42531-1 (1,154 pieces), supporting both immediate procurement needs and long-term production planning.

Frequently Asked Questions (FAQ)

Q: Can the 42531-2 be used as a direct replacement for the 42531-1 in existing assemblies?

A: Yes. The 42531-2 is mechanically and electrically equivalent to the 42531-1 across all critical parameters. Both parts are female receptacle terminals for 16-20 AWG wire with identical barrel diameter, overall length, and crimp termination specifications. The 42531-2 can be substituted directly in existing Shur-Plug connector applications.

Q: What is the difference between the 42531-1 and 42531-2?

A: The primary differences are product status and contact finish. The 42531-1 is obsolete with an unspecified contact finish, while the 42531-2 is an active product with a tin-plated contact finish. The tin finish provides enhanced corrosion resistance. All mechanical and electrical specifications are identical.

Q: Are there any compatibility concerns when switching from 42531-1 to 42531-2?

A: No compatibility concerns exist. Both parts share identical terminal type, wire gauge range (16-20 AWG), barrel diameter (0.180"), overall length (0.785"), barrel length (0.420"), insulation diameter range (0.090" ~ 0.120"), and crimp termination method. The tin finish of the 42531-2 is compatible with all standard Shur-Plug mating components.

Q: Does the tin finish on the 42531-2 affect performance compared to the 42531-1?

A: The tin finish on the 42531-2 enhances corrosion resistance and contact reliability without affecting electrical performance or mechanical fit. The finish is compatible with standard connector mating interfaces and does not introduce any performance degradation.

Q: What is the packaging difference between these parts?

A: The 42531-1 packaging specification is not provided in the available data. The 42531-2 is supplied in Cut Tape (CT) packaging, which is standard for terminal components and facilitates automated assembly processes.

Q: Are both parts RoHS compliant?

A: Yes. The 42531-1 is RoHS Compliant, and the 42531-2 is ROHS3 Compliant. Both parts meet current RoHS requirements. The 42531-2 carries the more current ROHS3 certification standard.

Q: What is the REACH status for these parts?

A: The 42531-1 has a vendor-undefined REACH status. The 42531-2 is REACH Unaffected, indicating that the substance restrictions under REACH do not apply to this component. The 42531-2 provides clearer regulatory documentation for compliance purposes.

Q: Can the 42531-2 be used in new product designs?

A: Yes. The 42531-2 is an active product with full manufacturing support from TE Connectivity AMP Connectors. It is the recommended choice for new designs requiring 16-20 AWG female receptacle terminals in the Shur-Plug series.

Q: What wire gauges are compatible with both parts?

A: Both the 42531-1 and 42531-2 are designed for 16-20 AWG wire gauges with an insulation diameter range of 0.090" ~ 0.120" (2.29mm ~ 3.05mm). Crimp termination is required for both parts.