What this selective RCCB does on the line
Selective means it delays tripping on transient earth faults — so a downstream RCD can clear the fault first, keeping this device closed and the rest of the feeder alive. That selectivity is the whole point: you use it as the main incoming RCD in a distribution board where you have sub-circuits with their own 30 mA RCDs. It prevents a nuisance trip on the main from taking out the entire panel. Rated for 230/400 V AC at 50/60 Hz, with a short-circuit current rating of 10 kA per IEC 61008-1.
Depth is 70 mm — sits flush in a standard 2-row enclosure. Silicon-free construction matters for environments where silicone outgassing can contaminate contacts or optics — common in automotive paint shops or semiconductor fabs.