The Siemens 5SV4647-0 is a SENTRON residual current circuit breaker (RCCB) — 4-pole, Type AC, rated 80 A with a 300 mA trip sensitivity on a 230/400 V AC supply. This is the instantaneous version (no short-time delay), so it clears earth faults without intentional lag, which matters when coordinating with downstream RCBOs or upstream time-delay RCDs in a distribution board.
The 300 mA sensitivity (Type AC) catches sinusoidal AC residual currents only — it is not rated for pulsed DC or smooth DC faults.
