It is a 2-pole (2P) device for 220-240 V AC networks at 50/60 Hz, providing Type A protection — meaning it detects sinusoidal AC residual currents plus pulsating DC residual currents, covering the majority of modern electronic loads like switched-mode power supplies and variable-speed drives.
The 40 A rated current (In) and 30 mA sensitivity define the protection envelope: the RCCB will trip on earth faults above 30 mA, protecting personnel against direct or indirect contact, while carrying up to 40 A of load current continuously. Type A classification per EN/IEC 61008-1 detects pulsed DC residual currents that Type AC RCCBs may not trip on. Voltage-independent tripping means the RCCB does not need a separate power supply or neutral-to-earth voltage to detect a fault. It uses the fault current itself to energize the trip solenoid — a reliability advantage on circuits where the supply voltage might sag during a fault.
The 36 mm width occupies 4 modular pitches of 9 mm, leaving room for adjacent MCBs or contactors in the same row. Neutral is on the left — wire the incoming neutral to the left-side terminal to maintain phase-neutral orientation through the panel. Wire stripping length is 14 mm. IP20 finger-safe protection on the terminals; IP40 inside a modular enclosure — standard for distribution boards.