Integrator's field note
The Siemens SENTRON 5SY5263-7KK11 is a 2-pole miniature circuit breaker rated 63 A at 400 V AC (C-curve, 10 kA per EN 60898) and 440 V DC (10 kA per EN 60898-2). Universal-current design means it handles both AC and DC circuits, but observe DC polarity at the terminals (AC as required, DC polarity must be followed).
Halogen-free and silicon-free construction. Ambient operating range -40 °C to 75 °C, with derating per the influence curve (max 95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C). Designed for railway applications (energy limiting class 3). Sealable for tamper-proof installations. Touch protection included.