The Siemens 5SV4412-0 is a 2-pole residual current circuit breaker (RCCB) from the SENTRON family, Type AC, rated 25 A with a 100 mA trip threshold at 230 V AC. That 100 mA sensitivity is sized for equipment protection rather than personnel shock — it catches insulation degradation on fixed wiring or motor windings before leakage climbs high enough to trip a 30 mA device, provided the downstream circuit is coordinated for it.
The 100 mA residual sensitivity is instantaneous (no intentional delay), so it clears earth faults within the standard trip curve for Type AC devices, which detect sinusoidal AC leakage only. Supply voltage is 230/400 V AC, 50 Hz only — this unit is not rated for 60 Hz operation. The 2-pole construction switches both phase and neutral on a single-phase supply or one phase plus neutral on a three-phase system.
IP20 rating applies only when the distribution board cover is installed and conductors are connected — bare terminals are not finger-safe. The grid spacing of 60 mm matches standard European distribution board cutouts.