The Siemens 5SU1153-7KV06 is a combined residual-current and overcurrent protective device (RCBO) — an FI/LS protector — in a Type A, 1+N-pole format. It carries a rated residual current IΔn of 10 mA and a thermal-magnetic trip curve C at 6 A, with a short-circuit breaking capacity of 4.5 kA. The 70 mm depth is standard for DIN-rail mounted RCBOs in the SENTRON family, fitting alongside a 1-pole MCB width.
Type A detection means it responds to AC sinusoidal residual currents plus pulsating DC components — the minimum for circuits with single-phase rectifiers, switching power supplies, or variable-speed drives. The 10 mA IΔn is a high-sensitivity trip threshold, typically specified for circuits supplying wet areas (bathrooms, showers) or medical IT rooms where a lower leakage limit is mandated by installation standards.