It is rated at 63 A with a 100 mA tripping fault current, type A, for 400 V AC systems at 50 Hz.
The 63 A rating is the nominal current at 40 °C; above that, the unit derates linearly to 50.4 A at 70 °C (–). The 100 mA trip threshold suits sub-distribution or feeder protection where 30 mA would nuisance-trip on leakage. Mounts on DIN rail (REG) in any position. The 3-module width and 70 mm depth fit standard distribution boards.
