The SENTRON 5SP4463-8 is a 4-pole miniature circuit breaker from the 5SP4 series, rated 63 A with a D tripping characteristic at 400 V AC. This is the breaker you reach for when starting up motor loads or transformer-fed circuits where inrush current would nuisance-trip a C-curve device — the D-curve holds through the higher surge, typically 10–20× rated current for a short window, then clears on a hard fault.
The EN 60898 rating covers residential/commercial installation coordination.
Tunnel terminals at both top and bottom accept the incoming and outgoing conductors — no need to flip the breaker for bottom-feed wiring. The 4-pole format occupies four modular width units on the DIN rail.