The Siemens SENTRON 5SL6632-7MB is a 4-pole (3P+N) miniature circuit breaker rated 400 V AC, 32 A, with a C tripping characteristic and 6 kA breaking capacity per EN 60898 and IEC 60947-2.
Snaps onto standard DIN rail — any mounting position works, which helps when you're retrofitting into a crowded panel.
Key ratings in plain terms
The 32 A rating handles a 7.5 kW three-phase motor at 400 V (roughly) or a cluster of resistive loads up to that line current. Mechanical life is 20,000 cycles typical — that's plenty for a distribution breaker that cycles rarely.