The Siemens 5SU9356-7KM32 is a 1P+N RCD-operated circuit breaker (RCBO) from the SENTRON 5SU9 family, combining overcurrent protection and residual current detection in a single 36 mm (2 MW) wide module.
Type A fault current and where it matters
That makes it the right choice for modern panels where electronic loads are common; a standard Type AC device would miss pulsating DC faults. The device is instantaneous, so it trips without intentional delay, and its energy limiting class is 3, which limits let-through energy during a fault.
The ambient temperature range is -25 to +45 °C, and derating applies above 40 °C — the rated current drops from 32 A at 30 °C to 27.84 A at 50 °C (–). IP20 protection is standard for installed distribution boards with conductors connected; the enclosure is halogen-free and silicon-free.