The Siemens 5SU9354-7KK32 is a SENTRON RCBO — a combined RCD and MCB in one 2-module-wide (36 mm) package, designed to protect a single-phase final subcircuit against overload, short-circuit, and earth leakage. It's a 1P+N device, meaning it switches the line conductor and monitors the neutral for imbalance, tripping on residual current instantaneously (no time delay). The Type C tripping characteristic (5–10× In) handles inrush from motorized loads, lighting ballasts, and small transformers without nuisance trips.
Rated 32 A at 30 °C ambient, with a derating curve provided down to 25.92 A at 55 °C — so if your enclosure runs hot, size the upstream breaker accordingly. The insulation voltage (Ui) is 264 V, surge voltage resistance 4 kV, and surge current withstand 1 kA (8/20 μs).
Snaps onto DIN rail (EN 60715) in any mounting position, 70 mm installation depth, 77 mm overall depth. Halogen-free and silicon-free construction, rated for -40 °C to 75 °C storage and 95% humidity.