The tripping threshold is fixed at 300 mA, so it is sized for equipment protection or fire protection rather than personal shock protection (which typically uses 30 mA). The RCD is non-sealable and non-adjustable — the trip current and delay are factory-set.
The 100 A rating holds only up to 40 °C ambient. Above that, the device must be derated: 93 A at 45 °C, 90 A at 50 °C, 87 A at 55 °C, 85 A at 60 °C, 83 A at 65 °C, and 80 A at 70 °C.
The RCD withstands a surge current of 1 kA and a surge voltage of 4 kV. The rated fault current is 300 mA, non-adjustable. The device is instantaneous (no time delay), so it trips within milliseconds of a fault exceeding the threshold. It includes a protection function against false tripping, which helps avoid nuisance trips from transient surges.