Terminals - Ring Connectors

Part Number	Description / PDF	Quantity
MU14-14R/SK 3M	CONN RING CIRC 14-16AWG #1/4	994
485029-1 TE Connectivity AMP Connectors	CONN RING D-SHAPE 14-18AWG #1/4	19075
94748 3M	CONN RNG CIR 10-12AWG 5/16 1=1PC	775
P18-6RHT6-C Panduit Corporation	CONN RING CIRC 18-22AWG #6 CRIMP	607
P4-14R-T Panduit Corporation	CONN RING CIRC 4AWG #1/4 CRIMP	6105600
PMV1-3RB-3K Panduit Corporation	CONN RING CIRC 18-22AWG M3 CRIMP	2191
34148 TE Connectivity AMP Connectors	CONN RING CIRC 16-22AWG #8 CRIMP	14285
1577618-1 TE Connectivity AMP Connectors	CONN RING CIRC 22-24AWG #4 CRIMP	857
PV12-14HDR-L Panduit Corporation	CONN RING CIRC 12-16AWG #1/4	317
P4-14RHT6-E Panduit Corporation	CONN RING D-SHAPE 4AWG #1/4	107
130171 TE Connectivity AMP Connectors	CONN RING CIRC 10-12AWG M5 CRIMP	9165
41558-1 TE Connectivity AMP Connectors	CONN RING CIRC 14-18AWG #6 CRIMP	0
2-342184-1 TE Connectivity AMP Connectors	CONN RING CIRC 10-12AWG M5 CRIMP	1120
PNF14-8R-M Panduit Corporation	CONN RING CIRC 14-16AWG #8 CRIMP	2222
626030-1 TE Connectivity AMP Connectors	CONN RING CIRC 15-20AWG CRIMP	0
PK4-56R-T Panduit Corporation	CONN RING CIRC 4AWG #5/16 CRIMP	0
2-36158-1 TE Connectivity AMP Connectors	CONN RING CIRC 14-16AWG #6 CRIMP	2192
321866 TE Connectivity AMP Connectors	CONN RING CIRC 1/0AWG #1/4 CRIMP	128
3240069 Phoenix Contact	CONN RING CIRC 18-20AWG M2.5	19890
328657 TE Connectivity AMP Connectors	CONN RING CIRC 16-22AWG #2 CRIMP	4361

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)