The Siemens 5SU9104-1KK10 is a SENTRON RCD-operated circuit breaker (RCBO) combining overcurrent protection and residual current detection in a single 18 mm wide module.
Temperature derating and real-world current
At 40 °C it derates to 9.4 A, at 45 °C to 9.1 A, at 50 °C to 8.7 A, and at 55 °C to 8.1 A. If your panel runs warm — say inside a non-ventilated enclosure near other heat sources — size the load accordingly.
Installation notes
Mounts in any position on DIN rail. The IP20 rating applies once installed with conductors connected; the enclosure provides the environmental seal.
Halogen-free and silicon-free construction. Rated insulation voltage 264 V, surge voltage resistance 4 kV, surge current withstand 1 kA (8/20 µs waveform). Energy limitation class 3.
