The Siemens 5SY4463-6CC11 is a SENTRON 4-pole miniature circuit breaker rated 63 A with a B tripping characteristic and 10 kA breaking capacity at 400 V AC per EN 60898.
Four width units (72 mm wide) on the DIN rail, 76 mm deep, installable in any mounting position.
Environmental and application notes
Rated for railway applications per the design code, with a -40 to +70 °C ambient range and -40 to +75 °C storage. Energy limiting class 3 means it lets through less let-through energy (I²t) than class 1 or 2 breakers, which helps protect downstream components during a fault. Overvoltage category III suits it for fixed installation downstream of the utility meter.