The Siemens 5SV3311-6KK12 is a 2-pole residual current circuit breaker (RCCB) from the SENTRON family, Type A, rated 16 A with 30 mA trip sensitivity on a 230 V AC, 50 Hz supply. It is an instantaneous-trip device — no intentional short-time delay — so it responds immediately to earth leakage currents above the threshold. This part carries the SIGRES designation for harsh ambient conditions, meaning the internal design tolerates condensation, vibration, and aggressive atmospheres better than a standard RCCB — relevant for outdoor enclosures, agricultural sheds, or unheated plant rooms. Supply can be connected from top or bottom; for SIGRES function, top feed is recommended to maintain protection even when the device is switched off. The IP20 rating applies when installed in a distribution board with conductors connected — standard for panel-internal protection, not for wet-area standalone use.
The 30 mA sensitivity is standard for personnel protection, catching leakage through the human body. Type A detection covers sinusoidal AC and pulsating DC residual currents. The part is silicon-free. Power dissipation is 0.7 W per pole at rated current.
Occupies 2 MW (36 mm) on a 60 mm grid-spaced DIN rail. The 70 mm depth fits standard 80 mm deep enclosures with clearance for wiring. The overvoltage category is III (fixed installation, distribution level), so it is rated for the transient environment of a building main panel or industrial sub-distribution board.