Waterproof Connectors Manufacturer - Holin

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Circular Connector: Ideal Outdoor Waterproof Wire Connector Solution

Why is Circular Connector your ideal outdoor waterproof wire connector choice?

Holin's IPC grade IP66, IP67, and IP68 Rating Circular Connectors are designed to meet the high requirements of industrial applications under harsh environmental conditions.

Circular Connector Series Products Features:

  • Dust Tight
  • Anti-Vibration
  • Waterproof
  • Weatherproof
  • Saltwater environment
  • Suitable for outdoor environment, etc

The circular connectors are available in:

  • A-mini size
  • B-standard size
  • C-middle
  • D-large sizes
  • P size
  • E-macro size

Circular Connector Types:

  • Panel Mount
  • Overmolded with Cable
  • Field-Attachable

Our Circular Waterproof Connectors are suited for the transmission of electrical currents from 0.5 to 25 Amps per contact with the option of 2 to 37 contacts.


The number of pins available for circular connectors:

2 pins to 31 pins, and 37 pins.

Circular Connectors Applications:

  1. Marine Electronics (Rader, GPS/ Autopilot, Communication)
  2. Renewable Energy
  3. Industrial Computer
  4. Agriculture Equipment
  5. Electric Bike
  6. Medical Devices
  7. Railway and Metro
  8. Metal Detector
  9. Thermo Detector
  10. Outdoor Plug Using
    • Outdoor Display
    • Outdoor Lighting
    • Outdoor Wireless Access Point
    • Outdoor Camera

HOLIN offers solutions of circular connectors, waterproof wire connectors, and Cable Assemblies. Connector size and hybrid pins can be customized. To see more customization information please click here.

Recommend Panel Connector's Panel Cut Out (unit : mm)
A-Size B-Size C-Size D-Size E-Size P-Size
Mini Standard Middle Large Macro C16

A-Size Waterproof Connectors
Number of Pins 2 3 4 5 6
Current Rating (per pin) 5A 5A 2A 2A 2A
B-Size Waterproof Connectors
Number of Pins 2 3 4 5 6 7 8 10 12 Hybrid
Current Rating (per pin) 5, 10A 5, 10A 5, 10A 5A 5A 5A 5A 2A 2A 2A & 10A
C-Size Waterproof Connectors
Number of Pins 3 4 5 6 9 10 12 14 18
Current Rating (per pin) 20A 10A 10A 10A 10A 5A 5A 5A 2A
D-Size Waterproof Connectors
Number of Pins 2 3 4 5 6 7 18 Hybrid
Current Rating (per pin) 20A 20A 20A 20A 20A 20A 5A 5A & 20A
E-Size Waterproof Connectors
Number of Pins 31 37
Current Rating (per pin) 5A 2A
P-Size (C16) Waterproof Connectors
Number of Pins 4 7
Current Rating (per pin) 10A 10A