The 50 A rating holds at 35 °C ambient; at 40 °C it derates to 47.6 A, at 50 °C to 45.1 A, and at 55 °C to 43.75 A — so if your panel runs hot, size up or account for the drop. Breaking capacity is 6 kA per EN 60898-1 and 10 kA per IEC 60947-2 / UL1077.
Width is 18 mm — one modular unit on a standard DIN rail. That's the same footprint as any 1-pole SENTRON or 5SL-series MCB, so it drops into an existing panel without re-drilling or re-wiring the busbar. Mounting position any, fastening via the quick assembly system (snap-on DIN rail clip). IP20 with connected conductors — fine for a closed panel, not for wet washdown areas. Sealable, halogen-free, silicon-free. Touch protection is built in, so you don't need separate finger-safe covers on the line side.