Terminals - Ring Connectors

Part Number	Description / PDF	Quantity
3240018 Phoenix Contact	CONN RING CIRC 16-20AWG M4 CRIMP	1215412600
3240029 Phoenix Contact	CONN RING CIRC 10-12AWG M6 CRIMP	2799
3240090 Phoenix Contact	CONN RING CIRC 8AWG M6 CRIMP	3449
3240016 Phoenix Contact	CONN RING CIRC 16-20AWG M3 CRIMP	3027
3240083 Phoenix Contact	CONN RING CIRC 10-14AWG M4 CRIMP	0
3240078 Phoenix Contact	CONN RING CIRC 14-18AWG M4 CRIMP	124
3240017 Phoenix Contact	CONN RING CIRC 16-20AWG M3.5	4195
3240069 Phoenix Contact	CONN RING CIRC 18-20AWG M2.5	19890
3240028 Phoenix Contact	CONN RING CIRC 10AWG M5 CRIMP	798100
3240070 Phoenix Contact	CONN RING CIRC 18-20AWG M3 CRIMP	5882
3240104 Phoenix Contact	CONN RING CIRC 4AWG M16 CRIMP	29
3240026 Phoenix Contact	CONN RING CIRC 14-16AWG M8 CRIMP	2006
3240081 Phoenix Contact	CONN RING CIRC 14-18AWG M8 CRIMP	1040
3240079 Phoenix Contact	CONN RING CIRC 14-18AWG M5 CRIMP	550
3240103 Phoenix Contact	CONN RING CIRC 4AWG M12 CRIMP	84
3240111 Phoenix Contact	CONN RING CIRC 1/0AWG M8 CRIMP	189
3240222 Phoenix Contact	CONN RING CIRC 8AWG M10 CRIMP	0
3240107 Phoenix Contact	CONN RING CIRC 2AWG M10 CRIMP	2
3240085 Phoenix Contact	CONN RING CIRC 10-14AWG M6 CRIMP	103950
3240100 Phoenix Contact	CONN RING CIRC 4AWG M6 CRIMP	0

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)