Rated 40 A with 30 mA sensitivity, it protects against sinusoidal AC fault currents in 3P (three-pole) circuits at 400-415 V AC, 50/60 Hz. The voltage-independent tripping technology means it operates without an external power supply, relying on the fault current itself to trigger the mechanism.
The 30 mA earth-leakage sensitivity is the standard threshold for personal protection against fatal electric shock — it trips before a fault current reaches a level that could cause ventricular fibrillation. The voltage-independent tripping is a reliability advantage: the device does not depend on the supply voltage to operate, so it provides protection even if the neutral is lost upstream. The 8/20 µs impulse withstand of 250 A confirms the device can survive transient surge currents without nuisance tripping or damage.
Clip-on mounting onto a DIN rail — standard 35 mm symmetrical rail. The device occupies 7 x 9 mm pitches, so the width is 117 mm for the 3P unit. Depth is 73.5 mm, height 91 mm. It is designed as an outgoer device, meaning it sits on the load side of the breaker. The electrical connection to the MCB is by screws; bottom terminals are tunnel type accepting 1-35 mm² rigid or 1-25 mm² flexible cable. The comb busbar and distribution block compatibility is confirmed for the bottom side.
The local trip indicator provides a visual confirmation of the tripped state, aiding fault-finding on the panel.