Siemens 5SU1354-7GV10 — SENTRON RCBO, 10 A, Type C, 10 kA
The Siemens 5SU1354-7GV10 is a SENTRON RCBO (residual current circuit breaker with overcurrent protection) in a 1P+N, 2-pole design, rated 10 A at 30 °C with a Type C tripping characteristic. Rated voltage is 230/240 V AC at 50 Hz, with an insulation voltage (Ui) of 264 V and surge voltage resistance of 4 kV.
The 10 A rating at 30 °C derates linearly as ambient temperature rises: 9.5 A at 40 °C, 9.3 A at 45 °C, 9 A at 50 °C, 8.7 A at 55 °C, 8.5 A at 60 °C, 8.2 A at 65 °C, and 8 A at 70 °C. In a crowded panel where internal temperature hits 50 °C, the effective continuous current drops to 9 A — factor that into your load calculation rather than relying on the 30 °C nameplate figure.
Dimensions are 77 mm depth, 36 mm width (2 MW), 90 mm height, with an installation depth of 70 mm. The 36 mm width matches standard DIN-rail modular devices — it occupies the same footprint as two single-pole MCBs side by side. The IP20 rating means the distribution board must be closed and conductors connected for the protection to be effective; this is normal for panelboard installation, not a standalone enclosure.