Rated at 40 A and 30 mA sensitivity on a 400 V AC supply, it snaps onto DIN rail in the distribution board — sized for a 4-module width in the 5SM3 enclosure family.
Type B trip characteristic means it detects AC, pulsating DC, and smooth DC fault currents up to the rated sensitivity — covers variable-frequency drives, PV inverters, and UPS-fed circuits where pure AC-sensitive RCCBs would miss a DC fault component. Short-time delayed (selective) rating coordinates with downstream 30 mA RCCBs to avoid nuisance tripping on transient leakage; the 40 A main rating carries the full sub-distribution load before the final circuits.