It combines residual current protection with integrated thermal overload protection in a single 2-module-width package. Rated at 40 A and 30 mA trip sensitivity on a 230 V AC supply, this is a Type A device — it detects sinusoidal AC fault currents plus pulsating DC fault currents, which covers most modern electronic loads like variable-speed drives, LED drivers, and switching power supplies. The instantaneous design (no short-time delay) means it trips within milliseconds of a fault, giving fast disconnection for personnel protection. Finger and back-of-hand safe construction meets the shock-protection requirements for panel builders.
Installation and environmental fit
The screw terminals call for 2.5 to 3 N·m tightening torque. Installation depth is 70 mm. Overvoltage category III suits fixed-installation distribution boards downstream of the utility meter.