The Siemens 5SY6202-6CC is a 2-pole miniature circuit breaker from the SENTRON 5SY6 series, designed for 400 V AC (single- or multi-phase) with a B tripping characteristic and a 6 kA breaking capacity per EN 60898. It also carries a 5 kA rating per UL 1077 and CSA C22.2 No.235, so it's accepted in North American panels alongside the European spec.
The 6 kA breaking capacity at 400 V AC (EN 60898) tells you it can safely interrupt a fault up to that level without upstream damage; the 5 kA rating under UL 1077 covers North American installations. Rated for 72 V DC maximum, so it handles DC control circuits within that limit.
Rated for ambient temperatures from -40 °C to 75 °C, with humidity influence specified up to 95% at 55 °C, tapering to 35% at 75 °C — important for outdoor or unconditioned enclosures. Vibration resistance per IEC 60068-2-6 covers ±1 mm at 5 to 25 Hz and 50 m/s² at 25 to 150 Hz, so it holds up on machinery with moderate vibration. The IP20 protection (with connected conductors) is typical for panel-mount breakers; the sealable feature and halogen-free / silicon-free construction suit environments where outgassing or contamination is a concern.