The SENTRON 5SL4263-7RC is a 2-pole miniature circuit breaker with a C tripping characteristic, rated 63 A at 415 V AC and a breaking capacity of 10 kA per EN 60898. It occupies a single modular width (18 mm) on the DIN rail, so it fits tight panel layouts without crowding adjacent breakers. The C-curve trips between 5× and 10× rated current, which suits motor-starting and transformer inrush loads in residential and light commercial infrastructure panels. At 63 A it handles a substantial feeder or submain, not just a final subcircuit. Power loss per pole runs 5.4 W at rated current in the hot state — a figure to check for thermal buildup inside a densely packed enclosure, especially when multiple breakers are ganged.
Integration & Mounting
Snap-on mounting to a 35 mm DIN rail, installable in any orientation. Depth is 76 mm (70 mm behind the panel), width 18 mm (1 MW), height 90 mm. IP20 with connected conductors — standard for enclosed distribution boards, not for wet or washdown locations. Sealable design allows the installer to lock the toggle in the ON or OFF position, preventing unauthorized switching on a critical feeder. Halogen-free and silicon-free construction reduces toxic smoke and silicone contamination in sensitive environments.
Electrical Ratings & Compliance
Rated for AC only, 50/60 Hz, with a maximum operating voltage of 440 V in multi-phase operation and 250 V single-phase. The DC rating is limited to 72 V maximum — not a general-purpose DC breaker above that level. Overvoltage category III and pollution degree 2, suitable for fixed-installation distribution boards. Energy limitation class 3 means it limits let-through energy well, aiding downstream device protection. Mechanical service life is 10 000 operating cycles typical. The housing accepts supplementary devices (auxiliary contacts, shunt trips, undervoltage releases) for remote signaling or emergency shutdown.