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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.

  • 20A B-Curve RCBO: Ideal for socket outlets, small power circuits, and domestic loads
  • Type A protection: Trips on AC and pulsating DC leakage
  • Compact: Single 18mm module width
  • 2-pole switched neutral: Ensures complete disconnection on fault
  • Minimises disruption: Only the faulty circuit is isolated
  • BS 7671 compliant: Meets 18th Edition Amendment 2 standards
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