The Siemens 5SY6210-8 is a 2-pole miniature circuit breaker from the SENTRON 5SY6 series, rated 10 A with a D tripping characteristic at 400 V AC. The D-curve means it's built for high inrush loads — motor starting, transformer energization, or welding equipment — where the magnetic trip holds off until roughly 10–20× rated current, so nuisance trips on start-up don't happen.
Combined terminals top and bottom; IP20 with conductors connected, which is standard for enclosed panel mounting. Mount in any position; ambient range -25 to +55 °C, storage down to -40 °C.
Rated for AC only. Overvoltage category III. Suitability flagged for mechanical engineering and industry. Touch protection built in. Halogen-free and silicon-free construction. The part carries ratings under EN 60898, IEC 60947-2, and UL 1077 / CSA C22.2 No. 235 (5 kA at AC).