The Siemens 5SU1346-6FP13 is a 4-pole RCBO (residual current circuit breaker with overcurrent protection) from the SENTRON series, combining a Type A residual current device (30 mA trip) and a B-curve miniature circuit breaker (13 A rated) in one 4-module-width unit. It protects against earth faults and overloads/short circuits in a single device, saving a DIN-rail position over separate RCD and MCB. Rated 13 A at 30 °C, it derates to 12.2 A at 40 °C and 10.3 A at 60 °C — the 40 °C figure is the one to use for panel sizing in a ventilated enclosure.
Touch protection is built in. IP20 rating applies once installed with conductors connected inside a distribution board — not for wet or outdoor exposed locations.
This is a standard SENTRON catalog line, widely specified across European and Middle Eastern distribution boards.