The SENTRON 5SP4363-8 is a 3-pole miniature circuit breaker from the 5SP4 design family, rated 63 A with a D tripping characteristic at 400 V AC. Both tunnel terminals (top and bottom) are present, so wiring in and daisy-chaining out is straightforward with ferruled or solid copper.
The D characteristic (10–20× In magnetic trip) is the right call when your load draws a short-duration spike well above nameplate — a 15 kW motor direct-on-line, a power supply bank, or a hydraulic pump. The 63 A continuous rating handles the steady-state draw; the D-curve lets the inrush pass without dropping the line. That dual rating means one part number covers both the panelboard spec and the machine-level coordination study.
Installation depth is 70 mm, which matches the standard SENTRON 5SP family footprint — it clips onto DIN rail and fits alongside other 5SP breakers in a distribution board or industrial enclosure. The 3-pole format means it occupies three modular width units on the rail.