The Siemens SENTRON 5SL4650-7 is a 4-pole (3P+N) miniature circuit breaker rated for 50 A at 400 V AC, with a C-curve tripping characteristic and a 10 kA breaking capacity certified to both EN 60898 and IEC 60947-2.
The 10 kA rating under both EN 60898 and IEC 60947-2 tells you this breaker clears a fault up to 10 kA at 400 V AC without upstream reinforcement. For a 50 A C-curve device, that covers the majority of utility-transformer-fed installations with short-circuit levels under that threshold.
Panel fit and environmental range
The 72 mm width (4 MW) matches the standard 18 mm/module grid.