Motor protection circuit breaker, SIRIUS series — Class 10 trip curve
The Class 10 trip characteristic means it will trip within 10 seconds at 7.2× the thermal setting — the standard for standard-duty motor starting where the acceleration time is under 10 seconds. The 45 mm width (three module spaces) and 75 mm depth fit standard distribution boards and motor control center buckets. Terminals are M3 screw-type, accepting 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded copper.
Breaking capacity and fuse coordination
For installations where the prospective fault current exceeds the breaker's interrupting rating at the operating voltage, the datasheet specifies upstream fusing: at 400 V, a gL/gG 40 A fuse is required; at 500 V and 690 V, a gL/gG 35 A fuse is required. At 240 V, no upstream fuse is required — the breaker is self-protecting at that voltage level.