The LSI protection covers overload (L), short-time short-circuit (S), and instantaneous short-circuit (I) — the full curve for distribution feeders where selective coordination matters. Rated insulation voltage (Ui) is 1250 V AC, and operational voltage (Ue) is 800 V AC 50/60 Hz — both per EN/IEC 60947-2. Mounting is fixed backplate with screw terminals, front-connected both sides. The 180 mm width and 250 mm height fit standard MCCB footprints; the 40 mm pole pitch matches common busbar spacing.
Durability and environmental limits
Mechanical durability is rated at 20,000 cycles; electrical durability at 2,500 cycles at 800 V In. That electrical figure is typical for a distribution breaker at full rated current — expect higher cycle counts at lower loads. Ambient storage range is -35 to 85 °C; operating altitude is 0 to 2000 m without derating, 2000 to 5000 m with derating. Power dissipation per pole is 38 W — account for that in enclosure thermal calculations.