What this SIRIUS breaker does in a panel
Rated 25 A continuous current and 11 kW at 400 V AC, it handles typical three-phase motor loads in the 5.5–11 kW range on a 400 V line.
Breaking capacity drops with voltage: 100 kA at 240 V, 50 kA at 400 V, 10 kA at 500 V, and 4 kA at 690 V AC. At 690 V the 4 kA figure is the limiting factor — if your panel feeds a 690 V bus with available fault current above 4 kA, this breaker alone won't clear it; you'd need upstream current limiting. The 6 kV rated surge voltage resistance (impulse withstand) aligns with IEC 60947-2 coordination requirements for motor starter combinations.
Width is 45 mm — three 9 mm module spaces — so it fits standard distribution boards. Screw-type terminals on the main circuit accept solid or stranded conductors: 2x (1 … 2.5 mm²) and 2x (2.5 … 6 mm²), or AWG 14–10. No backward or side clearance needed (0 mm), which simplifies panel layout. Shock rated 25g / 11 ms, so it holds up in mobile or high-vibration installations.