The Siemens SENTRON 5SY8110-7 is a 1-pole miniature circuit breaker with C-curve trip characteristic, rated to interrupt 40 kA at 400 V AC per IEC 60947-2 and 15 kA at 60 V DC per the same standard. That 40 kA figure is the high-fault rating that matters for industrial panel feed circuits where upstream transformers or large motor drives can deliver substantial short-circuit current — this breaker clears it without cascading to the main. For DC circuits, the 15 kA rating at 60 V covers most 24 V and 48 V control bus applications, though the maximum DC operating voltage is 72 V.
Fit and footprint
At 18 mm wide (1 modular unit) and 76 mm deep, this breaker slots into any standard DIN-rail enclosure without protruding past the gland plate on most 80 mm deep panels.
Vibration resistance per IEC 60068-2-6 covers ±1 mm at 5–25 Hz and 50 m/s² at 25–150 Hz, so it holds up on machine-mounted sub-panels near presses or conveyors. The 10 000 mechanical operating cycles typical service life covers routine switching for a decade or more in most industrial control panels.