It is a 4-pole unit rated 63 A with 300 mA sensitivity, Type AC (trips on sinusoidal AC residual currents), designed for group incomer duty in a distribution board. The clip-on mounting snaps onto a DIN rail alongside the paired MCB, making it a panel-integrated retrofit for an existing single-phase or three-phase subfeed.
Rated 63 A at 400 V AC phase-to-phase, 50 Hz. The 300 mA sensitivity is an equipment-protection threshold. Voltage-independent tripping means the RCD does not need a separate power supply to operate — it derives its trip energy from the fault current itself. This makes it inherently fail-safe against loss of neutral or supply voltage, a common requirement in industrial and commercial distribution where a powered RCD might not trip during a broken-neutral fault. Instantaneous time delay means it trips within the standard fast-response window (typically under 40 ms at 5× IΔn) — no intentional delay for selectivity. If you need coordination with downstream RCDs, a time-delayed (S-type) device is the correct choice. Pollution degree 3 and IP20 confirm it is intended for a clean, dry enclosure — not for washdown or outdoor mounting without a weatherproof cabinet.
Clip-on mounting on DIN rail. The add-on block screws directly to the side of the paired MCB. Cable terminals accept 0.75…16 mm² rigid or 0.33…10 mm² flexible.