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High Immunity Type A Mini RCBO – 40A B Curve (WRB140B-030)
Availability: 49 left in stock
SKU: WRB140B-030

£11.85

The WRB140B-030 High Immunity Type A Mini RCBO is a 40A B Curve protective device for residential and commercial circuits requiring higher current handling. At just 18mm wide, it combines overload, short-circuit, and residual current...

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Description Reviews FAQSs Technical Specs Installation Notes

The WRB140B-030 High Immunity Type A Mini RCBO is a 40A B Curve protective device for residential and commercial circuits requiring higher current handling. At just 18mm wide, it combines overload, short-circuit, and residual current protection in a single compact module. With 30mA Type A sensitivity and a high-immunity build, it ensures safe and stable protection for EV chargers, socket outlets, and fixed appliance circuits in line with 18th Edition standards.

Installer Tip: Choose the 40A B Curve for higher-load socket or appliance circuits. If protecting motors or equipment with higher inrush currents, use the 40A C Curve variant.

Key Features

  • 40A rated current – protects larger socket and appliance circuits
  • B Curve tripping – suited to residential and light commercial applications
  • Type A sensitivity – detects AC + pulsating DC leakage
  • High immunity design – minimises false tripping under harmonics
  • Compact 18mm module – ideal for retrofit boards
  • Switched live & neutral – ensures complete isolation
  • Bi-directional – safe for EV and PV installs

Compare Mini RCBO Variants

Model Rated Current Curve Type Width
WRB140B-030 (This Product) 40A B Curve Type A, High Immunity 18mm
WRB140C-030 40A C Curve Type A, High Immunity 18mm

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