The Siemens 5SU1353-7KV32 is a combined residual-current device and miniature circuit breaker (RCBO) — an FI/LS-protector — in a single 1+N-pole module. It carries Type A sensitivity at 30 mA rated residual current (IFN), a 4.5 kA short-circuit breaking capacity, and a C-curve thermal-magnetic trip at 32 A rated current. The 70 mm depth fits standard Siemens distribution boards and enclosures.
Type A detection covers AC sinusoidal and pulsating DC residual currents — the minimum for modern electronic loads (switched-mode supplies, variable-speed drives, washing machines, EV chargers). The C-curve (magnetic trip at 5–10× In, i.e. 160–320 A) handles moderate inrush without nuisance tripping — suited for motor and lighting circuits.