The Siemens 5SV3112-6 is a SENTRON residual current circuit breaker (RCCB), 2-pole, Type A, rated 25 A with 10 mA residual sensitivity for 230 V AC at 50 Hz. It is an instantaneous-trip device — no intentional short-time delay — so it clears a ground fault as fast as the waveform allows, which matters when coordinating with downstream electronics that can't ride through a delayed trip.
The IP20 rating is typical for an enclosed distribution board; the conductors must be connected for the protection to hold. Silicon-free construction suits environments where silicone outgassing can foul contacts or optics.
The 10 mA residual rating makes this unit suitable for circuits requiring enhanced protection against electric shock — typically circuits supplying wet-area outlets or medical equipment where the standard 30 mA threshold is too high. Type A detection covers sinusoidal AC residual currents and pulsating DC residuals up to 6 mA, which covers most single-phase rectified loads like switch-mode power supplies and LED drivers. The 0.5 kA rated conditional short-circuit current per IEC 61008-1 is the withstand rating under the standard's test conditions; the 10 kA SCCR is the higher breaking capacity when backed by an appropriate series fuse rated up to 63 A. Supplementary devices can be installed — typically an auxiliary switch or shunt trip for remote indication.