The Siemens 5SU1656-1KK13 is a SENTRON RCBO — a combined residual-current circuit breaker with overcurrent protection — rated 13 A at AC with tripping characteristic C, breaking capacity 6 kA per EN 60898, and AC fault current sensing. It occupies 2 width units (36 mm) on a DIN rail, mounts in any position, and accepts conductors up to 35 mm² solid or stranded. This is a current-production part.
Rated current derates with ambient temperature: 13 A at 30 °C, 12.48 A at 40 °C, 12.22 A at 45 °C, 11.96 A at 50 °C, 11.57 A at 55 °C, 11.31 A at 60 °C, 10.53 A at 65 °C, and 10.01 A at 70 °C. The operating ambient range is -25 to +55 °C; storage range is -40 to +75 °C. Overvoltage category III suits fixed-installation distribution boards. The RCBO is halogen-free and silicon-free, which matters for fire-safety and contamination-sensitive environments like clean rooms or food processing.