The Siemens 5SU1154-7KV06 is a combined residual-current device (RCD) and miniature circuit breaker (MCB) in one unit — an FI/LS protector — rated Type A, 10 kA breaking capacity, 1+N-pole, C-curve at 6 A, with a 10 mA rated residual operating current (IΔn). Type A detection means it trips on sinusoidal AC and pulsating DC residual currents up to 10 mA — the standard for circuits feeding single-phase rectified loads like switching power supplies, LED drivers, or washing machine electronics. The C-curve (6 A) governs the magnetic trip: it holds 5–10× rated current (30–60 A) for short-duration inrush from motor-start or capacitive loads, then clears fast above that. At 10 mA IΔn, this unit is sized for personnel protection in wet or medical-adjacent zones — not for general socket circuits where 30 mA is the norm.
The 70 mm depth (D=70MM) fits standard DIN-rail enclosures; the 1+N-pole format occupies one module width for the phase plus a switched neutral. In a distribution board, this unit replaces a separate RCD + MCB pair, saving one module of rail space per circuit. The 10 mA sensitivity makes it suitable for circuits supplying equipment in zone 2 medical locations (per IEC 60364-7-710) or where the installation standard demands a lower touch-voltage threshold.