What this RCCB is and where it fits
The Siemens SENTRON 5SV4617-0 is a 2-pole residual current operated circuit breaker (RCCB), Type AC, rated 80 A with a 300 mA trip threshold, for 230 V AC 50 Hz systems. It snaps onto a DIN rail (REG) and occupies 2 modular width units (36 mm). The 10 kA short-circuit current rating (SCCR) means it can safely interrupt faults up to that level without upstream damage — a solid figure for a residential or light commercial distribution board. The IP20 rating applies once the board is installed with conductors connected, so keep it inside an enclosure.
Key ratings and what they mean for your panel
The 80 A rating holds at 40 °C ambient; at 45 °C it derates to 77.87 A, and at 55 °C to 70.26 A — so if your distribution board runs hot, factor the derating curve into the load. The 300 mA residual-current trip is an instantaneous Type AC design (sine-wave AC faults only), not short-time delayed, so it's suited for general shock and fire protection on circuits without electronics generating pulsed DC faults. The test circuit requires a minimum 100 V to operate the test button. Mechanical service life is 10 000 switching cycles typical.