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The WRN20B-030 is a 20A Type A RCBO in a single-module, 2-pole design — providing both residual current (RCD) and overcurrent (MCB) protection in one compact device. It detects AC and pulsating DC leakage currents, making it suitable for modern domestic and commercial installations. With a built-in switched neutral, this RCBO ensures full circuit isolation on fault while keeping healthy circuits in service.
Installer Tip: For socket circuits and small appliance loads, a 20A B-Curve RCBO is often the most efficient choice. The WRN20B-030 covers both overload and residual current protection in one unit.