Transformer-protection breaker with Trip Class 10
Breaking capacity and fuse coordination
Rated breaking capacity hits 100 kA at 400 V and 500 V, dropping to 10 kA at 690 V. For fuse backup coordination, the spec calls for gL/gG fuses: 25 A up to 500 V, 20 A at 690 V. If you're coordinating with a downstream contactor for motor starting, note the maximum operating rate of 15 switching cycles per hour in AC-3 duty.
The 45 mm width (three TE) is standard for SIRIUS breakers — fits alongside contactors and overloads in a motor control center row. That matters when packing multiple breakers in a row — you can butt them front-to-back but need breathing space top and bottom for arc venting and heat rise.
Environmental and wiring specs
That -20 °C floor means it's fine for unheated electrical rooms in temperate climates but not for outdoor enclosures in deep freeze. Main contact terminals accept M3 screws; wire range is 2× (0.5 to 1.5 mm²) solid or stranded, or 2× (0.75 to 2.5 mm²).