The 40 A rated current at 40 °C matches the ampacity of a typical 10 mm² copper feeder; above that ambient, the part derates linearly to 17.6 A at 70 °C, so a panel in a hot enclosure or near a heat source needs a higher-rated unit or forced cooling. The conditional short-circuit rating per IEC 61008-1 is 0.5 kA when backed by a specific upstream fuse or MCB — check coordination with the branch breaker.
Residual current type and switching characteristics
For circuits with variable-speed drives, LED lighting, or other non-linear loads that generate pulsed DC leakage, a Type A or Type F RCCB is required. The design is instantaneous with no short-time delay, so it trips within milliseconds of the fault exceeding 30 mA. Silicon-free construction suits environments where silicone outgassing can contaminate contacts or optics.