PM1-4R-C Equivalent & Substitute Parts

Part Overview

The PM1-4R-C is a ring terminal connector manufactured by Panduit Corp, designed for circular M4 stud applications with 18-22 AWG wire gauge capacity. This component features a crimp termination method with a brazed seam and serrated termination design. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity and support ongoing system requirements.

Substiute Parts

PM1-4R-C

Panduit CorpIn Stock: 738PM1-4R-C Datasheet

Current PartRFQ

1-321897-3

TE Connectivity AMP ConnectorsIn Stock: 14541-321897-3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM1-4R-C is determined by the following critical parameters:

Primary Compatibility Criteria:

• Terminal type must be circular
• Stud size must be M4
• Wire gauge range must accommodate 18-22 AWG
• Termination method must be crimp
• Mounting configuration must be free hanging (in-line)

Secondary Compatibility Factors:

• Contact material composition
• Insulation configuration
• Overall dimensional tolerances (thickness, width, length)
• Serrated termination feature

The substitute part 1-321897-3 satisfies all primary compatibility criteria. Dimensional variations exist within acceptable engineering tolerances for this connector category, and the substitute provides enhanced features including insulation and high-temperature capability.

Parameter Comparison

Engineering Selection Recommendations

The PM1-4R-C is classified as obsolete. The substitute part 1-321897-3 is an active product from TE Connectivity AMP Connectors and maintains functional equivalence across all primary electrical and mechanical parameters required for M4 stud ring terminal applications in the 18-22 AWG range.

Compliance Advantages of 1-321897-3:

• Active product status ensures ongoing availability and supply chain support
• RoHS Compliant certification
• Moisture Sensitivity Level (MSL) rating of 1 (Unlimited) provides superior environmental handling characteristics compared to the obsolete main part

Dimensional Considerations: The substitute exhibits minor dimensional variations: length increases by 0.086" (2.19mm) and thickness decreases by 0.001" (0.02mm). These variations remain within standard engineering tolerances for this connector category and do not affect functional compatibility with M4 stud mounting interfaces.

Material Composition: The substitute utilizes Alumel contact material in place of copper, with insulation provided as a standard feature. These material differences support enhanced high-temperature performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can 1-321897-3 directly replace PM1-4R-C in existing applications?

A: Yes. Both parts share identical terminal type (circular), stud size (M4), wire gauge range (18-22 AWG), termination method (crimp), and mounting configuration (free hanging in-line). Dimensional variations fall within acceptable tolerances for this connector category.

Q: What is the significance of the insulation difference between these parts?

A: The PM1-4R-C is non-insulated, while 1-321897-3 is insulated. Insulation on the substitute provides additional electrical isolation and environmental protection. Application requirements determine whether insulation is necessary or acceptable.

Q: Does the contact material change from copper to Alumel affect electrical performance?

A: Both materials are suitable for electrical termination applications. Alumel provides enhanced high-temperature performance characteristics. Contact resistance and electrical conductivity remain within acceptable parameters for ring terminal connector applications.

Q: Are there packaging differences between these parts?

A: The PM1-4R-C packaging is not specified in available documentation. The 1-321897-3 is supplied in bulk packaging. Confirm packaging requirements with procurement specifications for your application.

Q: What compliance certifications apply to the substitute part?

A: The 1-321897-3 is RoHS Compliant and carries an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. Both parts share identical ECCN (EAR99) and HTSUS (8536.90.4000) classifications.

Q: Are there any dimensional constraints that would prevent substitution?

A: The substitute is 0.086" (2.19mm) longer overall and 0.001" (0.02mm) thinner than the main part. These variations are within standard engineering tolerances and do not affect M4 stud interface compatibility. Verify available mounting space in your specific application.