Tronic Four Pole 100A RCCB Residual Current Circuit Breaker

Our review

This Tronic device is a four pole residual current circuit breaker rated at 100 amps, part of the MC CHRC series. An RCCB trips when it senses current leaking to earth, which is what protects people from electric shock and cuts the risk of fire from faulty wiring. Four pole units suit three-phase installations where all live conductors plus neutral need monitoring, so this is aimed at homes, shops and small workshops with multi-phase supply rather than simple single-phase boards. Before buying, confirm your supply type, the earth leakage sensitivity your installation requires, and that the 100A rating matches your incoming setup, since an RCCB coordinates with fuses or MCBs rather than replacing them. Compare against RCBOs, which combine leakage and overcurrent protection in one unit, and against other brands on build quality and how neatly the module fits your existing enclosure. The compact, light body is designed to sit alongside other electrical products as a module.