Siemens 5SN6310-8CP is a 3-pole miniature circuit breaker from the 5SN series, C-curve tripping characteristic, rated 400 V AC at 50 Hz. Breaks 6 kA per EN 60898 and 15 kA per IEC 60947-2 — the higher IEC figure is the one that governs industrial panel coordination when the upstream transformer can deliver that fault current. DC rating maxes at 72 V.
Listed as current production.
Occupies 3 modular width units (54 mm wide), 76 mm deep, 90 mm tall. Installs on standard DIN rail. Terminal accepts up to 35 mm² solid.