Molex 0191951021 Ring Terminal Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0191951021 is a ring terminal connector designed for 3/8 stud applications with crimp and piercing termination capabilities. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing procurement and system maintenance. Ring terminal connectors serve as termination points for wire connections to studs or tabs in electrical assemblies, making substitute selection critical for maintaining circuit integrity and mechanical reliability.

Substiute Parts

0191951021

MolexIn Stock: 12590191951021 Datasheet

Current PartRFQ

61546-1

TE Connectivity AMP ConnectorsIn Stock: 1511461546-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Molex 0191951021 is constrained by the following critical parameters:

• Stud/Tab Size: The 3/8 stud dimension is a mechanical interface requirement that determines physical fit and load-bearing capacity
• Terminal Type: Circular ring terminals maintain consistent electrical contact geometry
• Termination Method: Crimp capability is essential for field assembly and repair operations
• Contact Material and Finish: Copper alloy with electro-tin finish provides corrosion resistance and electrical conductivity
• Insulation Type: Non-insulated construction matches the original design intent
• RoHS Compliance: ROHS3 compliance ensures regulatory alignment for current procurement

The identified substitute, TE Connectivity AMP Connectors part number 61546-1, shares the core functional characteristics of a circular ring terminal with crimp termination and non-insulated construction. However, this substitute operates at a different stud size (5/16 versus 3/8), which represents a mechanical incompatibility that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity 61546-1 is an active product with ROHS3 compliance, providing supply chain continuity for obsolete Molex 0191951021 applications. Both components meet current regulatory requirements and maintain non-insulated circular ring terminal construction.

The primary consideration for substitution is the stud size differential: the TE Connectivity part operates at 5/16 stud versus the original 3/8 stud specification. This mechanical incompatibility requires evaluation of the target assembly design. If the application hardware accommodates 5/16 stud fasteners, the TE Connectivity terminal provides functional equivalence with active product status and established supply availability.

The contact material transition from copper alloy to brass, combined with the thickness reduction from 0.062" to 0.050", represents secondary design variations that maintain electrical and mechanical performance within standard terminal connector specifications.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 61546-1 directly replace the Molex 0191951021 in existing assemblies?

A: Direct replacement is not possible due to stud size incompatibility. The TE Connectivity part requires 5/16 stud fasteners, while the original Molex terminal is designed for 3/8 studs. Hardware modification or redesign is necessary for substitution.

Q: What is the significance of the stud size difference?

A: Stud size determines the mechanical interface between the terminal and the fastening point. A 5/16 stud cannot be accommodated by a 3/8 terminal hole, and oversizing a terminal hole compromises mechanical clamping force and electrical contact reliability.

Q: Are both components RoHS compliant?

A: Yes, both the Molex 0191951021 and TE Connectivity 61546-1 are ROHS3 compliant, meeting current environmental and regulatory standards.

Q: What is the difference between the wire gauge specifications?

A: The Molex part specifies wire gauge as 10380-52480 CMA, while the TE Connectivity part specifies 6-10 AWG. These represent different gauge classification systems for the same general wire size range, both suitable for ring terminal crimp applications.

Q: Does the contact material change affect electrical performance?

A: Both copper alloy and brass provide adequate electrical conductivity and corrosion resistance when finished with tin plating. The material transition maintains performance within standard terminal connector specifications.

Q: What packaging format is available for the TE Connectivity substitute?

A: The TE Connectivity 61546-1 is supplied in Cut Tape (CT) packaging, suitable for automated assembly and component handling operations.