Terminals - Ring Connectors

Image Part Number Description / PDF Quantity Rfq
51986-3

51986-3

TE Connectivity Aerospace Defense and Marine

CONN RING CIRC 1/0AWG #1/2 CRIMP

0

184113-1

184113-1

TE Connectivity Aerospace Defense and Marine

CONN RING FLAT 4/0AL 3/0CU #1/2

0

277151-2

277151-2

TE Connectivity Aerospace Defense and Marine

CONN RING FLAT 1/0AL 2CU #3/8

0

51979-1

51979-1

TE Connectivity Aerospace Defense and Marine

CONN RING CIRC 10-12AWG #6 CRIMP

0

52587-1

52587-1

TE Connectivity Aerospace Defense and Marine

CONN RING CIRC 14-16AWG #1/4

0

134452-3

134452-3

TE Connectivity Aerospace Defense and Marine

TERMINAL, COPALUM, SEALED, 1/4,

0

50720-1

50720-1

TE Connectivity Aerospace Defense and Marine

CONN RING CIRC 8AWG #1/4 CRIMP

0

55835-2

55835-2

TE Connectivity Aerospace Defense and Marine

CONN RING FLAT 2AL 4CU #3/8

0

50719-1

50719-1

TE Connectivity Aerospace Defense and Marine

CONN RING CIRC 6AWG #1/4 CRIMP

0

51986

51986

TE Connectivity Aerospace Defense and Marine

CONN RING CIRC 1/0AWG #1/4 CRIMP

0

277152-3

277152-3

TE Connectivity Aerospace Defense and Marine

CONN RING FLAT 2/0AL 1/0CU #5/16

0

277148-6

277148-6

TE Connectivity Aerospace Defense and Marine

CONN RING FLAT 6AL 8CU #10 CRIMP

0

51995-2

51995-2

TE Connectivity Aerospace Defense and Marine

CONN RING D-SHAPE 4/0AWG #1/2

0

55840-1

55840-1

TE Connectivity Aerospace Defense and Marine

CONN RING FLAT 3/0AL 2/0CU #3/8

0

55995-1

55995-1

TE Connectivity Aerospace Defense and Marine

CONN RING FLAT 4/0AL 3/0CU #3/8

0

51982

51982

TE Connectivity Aerospace Defense and Marine

CONN RING CIRC 2AWG #1/4 CRIMP

0

50720-2

50720-2

TE Connectivity Aerospace Defense and Marine

CONN RING CIRC 8AWG #5/16 CRIMP

0

696884-1

696884-1

TE Connectivity Aerospace Defense and Marine

COPALUM,SLD,R,4/0AL 3/8

0

1958080-1

1958080-1

TE Connectivity Aerospace Defense and Marine

CONN COPALUM RING 2/0AL 2HOLE

0

55995-2

55995-2

TE Connectivity Aerospace Defense and Marine

CONN RING FLAT 4/0AL 3/0CU #5/16

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

TypeFunctional FeaturesApplication Examples
Open Barrel RingSplit design for easy wire insertionBattery terminals, control panels
Closed Barrel Ring360 compression for maximum conductivityHigh-vibration machinery
Insulated RingPolymer coating for short-circuit preventionAutomotive 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

ParameterTypical RangeImportance
Ampacity10-150ACurrent carrying capacity
Contact Resistance0.5-5m Power loss prevention
Dielectric Strength1kV-5kVInsulation reliability
Vibration Resistance15G @ 10Hz-2kHzAutomotive 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

ManufacturerProduct SeriesKey Features
TE ConnectivityDT Ring TerminalsCorrosion-resistant alloy, 125A rating
Phoenix ContactRTME SeriesPush-in wire connection, 600V compliance
Sumitomo ElectricHR4H-S-DC5VAutomotive-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)

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