The Siemens 5SY5263-6CC12 is a 2-pole miniature circuit breaker from the 5SY5 series, rated 63 A B-curve with a 10 kA breaking capacity at 440 V DC. The 440 V DC rating means it handles DC rail voltages common in industrial control panels and battery-backed bus systems without derating concerns.
DC rail fit and panel integration
Snap-on DIN rail mounting keeps panel integration straightforward — clips onto standard 35 mm rail, occupies two module widths. The 10 kA interrupting rating at 440 V DC covers most industrial DC distribution faults; no upstream current-limiting fuse required for typical 10 kA SCCR panels.