Terminals - Ring Connectors

Part Number	Description / PDF	Quantity
A4-14R-C Panduit Corporation	BATTERY CABLE LUG, 4 AWG, 1/4" S	3363500
PN12-38HDR-D Panduit Corporation	CONN RING CIRC 12-16AWG #3/8	0
PNF18-6R-C Panduit Corporation	CONN RING CIRC 18-22AWG #6 CRIMP	1641900
PV4-14R-T Panduit Corporation	CONN RING FLAT 4AWG #1/4 CRIMP	232
S4-38R-E Panduit Corporation	CONN RING FLAT 4AWG #3/8 CRIMP	139720
PV18-38R-LY Panduit Corporation	CONN RING CIRC 18-22AWG #3/8	758
S250-56R-5 Panduit Corporation	CONN RING FLAT 250MCM #5/16	46
S2-38R-X Panduit Corporation	CONN RING FLAT 1-2AWG #3/8 CRIMP	92560
P10-6RHT6-D Panduit Corporation	CONN RING CIRC 10-12AWG #6 CRIMP	839
A1-38R-C Panduit Corporation	BATTERY CABLE LUG, 1 AWG, 3/8" S	277500
PK10-8R-X Panduit Corporation	CONN RING CIRC 10-12AWG #8 CRIMP	0
PN14-6RN-M Panduit Corporation	CONN RING CIRC 14-16AWG #6 CRIMP	411
PN10-10RX-L Panduit Corporation	CONN RING CIRC 10-12AWG #10	269
PNF14-4R-C Panduit Corporation	CONN RING CIRC 14-16AWG #4 CRIMP	308
P18-8R-M Panduit Corporation	CONN RING CIRC 18-22AWG #8 CRIMP	4490
A3/0-56R-C Panduit Corporation	BATTERY CABLE LUG, 3/0 AWG, 5/16	381600
PV10-6R-D Panduit Corporation	CONN RING CIRC 10-12AWG #6 CRIMP	5040
PV10-10R-E Panduit Corporation	CONN RING CIRC 10-12AWG #10	0
PV4-38RX-T Panduit Corporation	CONN RING FLAT 4AWG #3/8 CRIMP	186
PV18-8RB-3K Panduit Corporation	CONN RING CIRC 18-22AWG #8 CRIMP	6773

Terminals - Ring Connectors

1. Overview

Ring connectors are cylindrical metallic terminals with a closed loop at one end, designed to establish secure electrical connections between wires and screw-type terminals. They prevent wire fraying and ensure stable contact in high-vibration environments. Critical for power transmission and signal integrity in industrial and automotive systems.

2. Main Types & Functional Classification

Type	Functional Features	Application Examples
Open Barrel Ring	Split design for easy wire insertion	Battery terminals, control panels
Closed Barrel Ring	360 compression for maximum conductivity	High-vibration machinery
Insulated Ring	Polymer coating for short-circuit prevention	Automotive electronics

3. Structure & Composition

Typical construction includes:

Copper alloy body (C11000/C14500) with tin/nickel plating
Insulation sleeve (PVC/nylon, 105 C rating)
Barrel section with 2-3 crimping zones for wire retention
Loop diameter tolerance 0.1mm for screw compatibility

4. Key Technical Specifications

Parameter	Typical Range	Importance
Ampacity	10-150A	Current carrying capacity
Contact Resistance	0.5-5m	Power loss prevention
Dielectric Strength	1kV-5kV	Insulation reliability
Vibration Resistance	15G @ 10Hz-2kHz	Automotive compliance

5. Application Fields

Primary industries:

Automotive (battery cables, alternator connections)
Industrial automation (PLC terminals, motor drives)
Renewable energy (solar charge controllers)
Aerospace (avionics grounding systems)

6. Leading Manufacturers & Products

Manufacturer	Product Series	Key Features
TE Connectivity	DT Ring Terminals	Corrosion-resistant alloy, 125A rating
Phoenix Contact	RTME Series	Push-in wire connection, 600V compliance
Sumitomo Electric	HR4H-S-DC5V	Automotive-grade tin-plated copper

7. Selection Guidelines

Key considerations:

Current/voltage requirements
Wire gauge compatibility (AWG 22-4/0)
Environmental factors (temperature, humidity, vibration)
UL/CSA certification for safety compliance
Color-coded insulation for circuit identification

8. Industry Trends

Emerging developments include:

Miniaturization for EV battery management systems
Graphene-enhanced plating for corrosion resistance
Smart connectors with integrated current sensing
Lead-free manufacturing processes (RoHS compliance)