The Siemens 5SV9316-7NK32 is a SENTRON RCBO — an RCD-operated circuit breaker that combines overcurrent and residual current protection in a single 18 mm wide module.
The 32 A rating is at 30 °C ambient; at 40 °C it derates to 30.4 A, and at 50 °C to 28.8 A. The 30 mA residual current is standard for personnel protection (shock risk) in most IEC-based installations. Type A means it catches sinusoidal AC faults and pulsating DC faults up to 6 mA smooth DC superimposed — needed on circuits with single-phase rectifiers, VFDs, or switching power supplies.
Panel integration
At 18 mm (1 MW) wide, it fits a standard modular enclosure slot. Depth is 77 mm, installation depth 70 mm, so it clears a 90 mm deep enclosure with a few mm to spare. IP20 rating applies once the distribution board is installed with conductors connected — treat it as protected inside the enclosure, not for wet locations.