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RCBO | OEM/ODM & Wholesale Price

Willmall RCBO supply supports final-circuit protection that combines earth leakage and overcurrent protection in one modular device, for electrical contractors and distributors.

  • Combined residual current and overload/short-circuit protection in one modular device
  • Configurable rated residual operating current for shock protection and fire prevention
  • 1P+N and multi-pole configurations for standard distribution boards
  • DIN rail mounting with standardized modular width for panel design
  • Trip indication and test button support for routine functional verification
What does an RCBO protect against?

An RCBO protects a circuit against earth leakage, overload, and short circuit, combining the functions of a residual current device and a miniature circuit breaker in one unit.

How does an RCBO differ from an RCCB and an MCB?

An RCCB provides earth-leakage protection only, and an MCB provides overload and short-circuit protection only. An RCBO combines both functions in a single modular device.

Which ratings should be selected first when choosing an RCBO?

Selection typically starts with rated current, rated residual operating current, pole configuration, and breaking capacity, matched to the final circuit load and the protection level required.

Where are RCBOs commonly used?

RCBOs are commonly used on individual final circuits such as socket outlets, showers, heaters, and dedicated equipment where independent leakage protection per circuit is preferred.

How is the RCBO test button used?

The test button is used for periodic verification. Pressing it creates a simulated residual current that should trip the RCBO if the device is functioning correctly.

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