The ABB GSH204 AC-D10/0.03 is a 4-pole, 10A, Type AC, D-curve Residual Current Circuit Breaker with Overcurrent Protection (RCBO). This is a specialized protective device designed for three-phase circuits (with neutral) that power loads with very high inrush currents, such as transformers, certain discharge lighting, or specific types of motor starting circuits. It integrates comprehensive protection against overloads, short-circuits, and earth leakage currents in a single unit. The key differentiator is its D-curve overcurrent characteristic, which provides a higher magnetic trip threshold to tolerate high startup surges without nuisance tripping, while its 30mA Type AC RCD component ensures protection against electric shock.
