The 3P+N pole configuration covers a three-phase plus neutral circuit, and the 4 kV impulse withstand voltage (Ui) means it handles transient surges common in industrial panels without nuisance tripping.
Clip-on mounting to DIN rail, 108 mm wide (6 x 9 mm pitches), 74 mm deep, 99.5 mm tall. Tunnel terminals accept 1–16 mm² rigid or 1–10 mm² flexible, with a 14 mm strip length and 2 N·m tightening torque. The screw connection to the upstream MCB means it's a mechanical add-on, not a bus-bar jumper; plan the wiring sequence accordingly.
300 mA sensitivity targets fire protection, not personnel protection. Type A covers sinusoidal and pulsed DC fault currents from VFDs and UPSs.