What this MCB is and where it fits
The Siemens SENTRON 5SL4463-7CC is a 4-pole miniature circuit breaker rated 63 A with a C tripping characteristic, breaking 10 kA per EN 60898 at 400 V AC. It occupies 4 modular width units (72 mm) on a DIN rail, with an installation depth of 70 mm and overall depth of 76 mm. The C-curve (5–10× In) handles moderate inrush from motor starters, small transformers, or lighting banks in residential and infrastructure panels — not for high-surge motor drives, but fine for general branch-circuit protection where the load isn't purely resistive.
Key ratings and what they mean for your panel
The 10 kA interrupting rating per EN 60898 is the standard for most residential and light commercial distribution boards — it safely clears a fault up to 10 kA without welding contacts or rupturing the case. The 400 V AC rated voltage suits three-phase 4-wire systems (3L+N) common in European and Asian grids; the multi-phase maximum of 440 V AC gives headroom for floating-delta or slightly elevated supply conditions. Pollution degree 2 (non-condensing, occasional conductive contamination) and overvoltage category III (fixed installation downstream of the main distribution board) are the expected environment for a panelboard MCB. The 5 W power loss per pole at rated current means a 4-pole unit dissipates 20 W total — factor that into enclosure ventilation if the panel is densely populated.
Panel integration notes
Mounts on a standard 35 mm DIN rail in any position. The 72 mm width (4 MW) matches the standard modular grid; the 70 mm installation depth leaves clearance behind a typical 100 mm deep enclosure. IP20 with connected conductors means the terminals are finger-safe only when wired — the busbar and load conductors must be in place for the protection rating to hold. Sealable design allows the installer to lock the toggle position with a padlock or seal wire for safety isolation. Supplementary devices (auxiliary switches, shunt trips, alarm contacts) can be snapped onto the right side without extra wiring — verify the specific accessory catalogue for compatibility.