What this SIRIUS breaker does
Rated operational current is 0.32 A at AC-3 duty (400 V), with a maximum rated voltage of 690 V. This means it protects the transformer primary against sustained overloads and short circuits, tripping fast enough (CLASS 10) to prevent winding damage while ignoring harmless inrush.
The S00 frame size keeps the footprint compact: 45 mm wide, 97 mm tall, 96 mm deep. That 45 mm width is the same as a standard single-pole MCB footprint, so it slots into a crowded DIN rail without re-spacing.
