TE Connectivity AMP Connectors 321671 Ring Terminal Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 321671 is a ring terminal connector designed for 4 AWG wire gauge applications with a 1/4 inch stud connection. This circular terminal features crimp termination and insulated construction with serrated termination characteristics. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity and ensure long-term component availability for new designs and field replacements.

Key Parameters

Parameter	Value
Wire Gauge	4 AWG
Stud/Tab Size	1/4 Stud
Terminal Type	Circular
Termination Method	Crimp
Insulation Type	Insulated
Contact Material	Copper
Contact Finish	Tin
Features	Serrated Termination
Mounting Type	Free Hanging (In-Line)

Substitute Part Grouping Explanation

Substitution of the obsolete TE Connectivity 321671 is determined by strict equivalence across the following critical parameters: wire gauge (4 AWG), stud size (1/4 inch), terminal type (circular), termination method (crimp), contact material (copper), contact finish (tin), and serrated termination feature. The substitute part TE Connectivity 324050 maintains full compatibility across all these core electrical and mechanical parameters. Dimensional variations in outer width and overall length, as well as differences in insulation material composition and product series designation, do not affect functional interchangeability for the specified application requirements.

Parameter Comparison

Parameter	321671 (Obsolete)	324050 (Active)	Compatibility
Wire Gauge	4 AWG	4 AWG	Equivalent
Stud/Tab Size	1/4 Stud	1/4 Stud	Equivalent
Terminal Type	Circular	Circular	Equivalent
Termination	Crimp	Crimp	Equivalent
Contact Material	Copper	Copper	Equivalent
Contact Finish	Tin	Tin	Equivalent
Features	Serrated Termination	Serrated Termination	Equivalent
Insulation	Insulated (Vinyl)	Insulated (Polyamide/Nylon)	Functionally Equivalent
Color	Yellow	Yellow	Equivalent
Thickness	0.048" (1.22mm)	0.048" (1.22mm)	Equivalent
Width - Outer Edges	0.679" (17.25mm)	0.546" (13.87mm)	Functionally Equivalent
Length - Overall	1.974" (50.14mm)	1.812" (46.02mm)	Functionally Equivalent
Insulation Diameter	0.436" (11.07mm)	0.382" (9.70mm)	Functionally Equivalent
Product Status	Obsolete	Active	Substitute Available
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Improved Compliance

Engineering Selection Recommendations

The TE Connectivity 324050 serves as the direct functional equivalent for the obsolete 321671 ring terminal connector. Both parts satisfy identical electrical requirements for 4 AWG wire gauge applications with 1/4 inch stud connections and maintain equivalent crimp termination characteristics. The 324050 is classified as an active product with current manufacturing status, ensuring ongoing availability and supply chain reliability.

The 324050 provides improved regulatory compliance through ROHS3 certification, whereas the 321671 is RoHS non-compliant. For applications subject to RoHS requirements or environmental regulations, the 324050 is the appropriate selection. The substitution of insulation material from vinyl to polyamide (nylon) in the 324050 maintains functional performance while offering enhanced material properties. Dimensional reductions in outer width and overall length do not compromise electrical or mechanical performance for the specified stud size and wire gauge application.

Frequently Asked Questions (FAQ)

Q: Can the 324050 directly replace the 321671 in existing assemblies?

A: Yes. The 324050 maintains electrical and mechanical equivalence across all critical parameters including wire gauge, stud size, terminal type, crimp termination, contact material, and contact finish. Dimensional variations in outer width and length do not affect functional interchangeability for the 1/4 inch stud connection and 4 AWG wire gauge application.

Q: What is the primary reason for substituting the 321671?

A: The 321671 is classified as obsolete. The 324050 is an active product with current manufacturing and supply availability, making it the appropriate choice for new designs and ongoing component procurement.

Q: Are there packaging differences between these parts?

A: Yes. The 321671 is supplied in unspecified packaging, while the 324050 is supplied in bulk packaging. Bulk packaging is standard for active production components and does not affect component performance or electrical characteristics.

Q: Does the change in insulation material from vinyl to polyamide affect performance?

A: No. Both vinyl and polyamide (nylon) insulation materials are suitable for the specified application. The polyamide insulation in the 324050 provides equivalent electrical performance and mechanical durability for 4 AWG wire gauge terminations.

Q: What is the significance of the RoHS compliance difference?

A: The 321671 is RoHS non-compliant, while the 324050 is ROHS3 compliant. For applications subject to RoHS directives or environmental regulations, the 324050 is the required selection. For applications without RoHS requirements, both parts are functionally equivalent.

Q: Are the dimensional differences between the parts significant?

A: The dimensional reductions in the 324050 (outer width 0.546" versus 0.679", overall length 1.812" versus 1.974") do not affect electrical performance or mechanical compatibility with 1/4 inch stud connections. These variations reflect design optimization in the active Terminyl series.

Q: Can both parts be used interchangeably in the same circuit design?

A: Yes. Both parts are electrically and mechanically equivalent for 4 AWG wire gauge applications with 1/4 inch stud connections. The 324050 is the recommended selection for new designs due to its active product status and improved RoHS compliance.

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