RCBO 63 A, D curve, 30 mA residual current
The Siemens 5SU1324-2RC63 is a 2-pole RCBO (residual current circuit breaker with overcurrent protection) rated 63 A, occupying 4 module spaces on a DIN rail. The D characteristic means it tolerates high inrush currents — typical for motor, transformer, or welding equipment loads — without nuisance tripping. The Type AC 30 mA residual-current element detects sinusoidal AC earth faults, covering basic shock protection and fire prevention in standard commercial and industrial final circuits.