The Siemens SENTRON 5SM3311-6KK13 is a 2-pole residual current circuit breaker (RCCB) rated 16 A at 40 °C, with a 30 mA trip threshold and Type A sensitivity — catches sinusoidal AC and pulsating DC fault currents, which covers most modern electronics and variable-speed drive loads in a panel.
The 16 A rating holds at 40 °C and 45 °C; above that it derates linearly to 11.2 A at 70 °C — a panel builder stacking multiple breakers in a warm enclosure needs to account for the thermal curve. Surge current withstand is 1 kA, and the let-through energy limit is 70 000 A²·s — the I²t value for coordinating with an upstream MCB or fuse.