What this SIRIUS breaker does on the line
It carries phase failure detection as standard, so if one leg drops on a three-phase motor, the breaker trips before single-phasing cooks the winding. Breaking capacity is 100 kA at 240 V, 50 kA at 400 V, 8 kA at 500 V, and 4 kA at 690 V — the 50 kA at 400 V is the figure most panel builders will size against for a 480 V or 400 V distribution board. Motor horsepower ratings span 7.5 hp at 110/120 V up to 60 hp at 460/480 V, covering a wide range of common industrial motor frames.
Mounting and wiring — what fits in the panel
Dimensions are 55 mm wide, 140 mm tall, 149 mm deep — the 55 mm width is three standard 18 mm module slots, so plan your DIN rail layout accordingly. Clearance requirements: 50 mm above and below, 10 mm to the side, zero forward or backward — tight panel layouts can push the side clearance to zero if the adjacent device is also a breaker, but keep the 10 mm for heat dissipation. Main circuit terminals are M6 screw-type, accepting 2x 1–35 mm² or 1x 1–50 mm² solid or stranded copper.