The Siemens 5SU1353-7KV13 is a combined residual-current device and miniature circuit breaker (RCBO) — an FI/LS-protector in Siemens' 5SU1 series. It packs Type A earth-leakage detection (30 mA sensitivity) and a C-curve overcurrent trip (13 A) into a single 1+N-pole module, rated to break 4.5 kA at the short-circuit level. That 70 mm width (roughly 4 standard DIN modules) means it fits a standard distribution board slot, but plan your enclosure fill — it's wider than a single-pole MCB.
Type A detection handles pulsating DC residual currents from rectifiers or power supplies — common with modern electronics, washing machines, LED drivers.