The 10 kA Icu at 1000 V DC (4 poles in series, per IEC 60947-2) tells you it can safely interrupt a fault current up to 10 kA on a 1000 V DC bus without welding or arcing through the enclosure. That breaking capacity is sized for the high short-circuit currents possible in large PV arrays, where multiple strings feed a common inverter or combiner box. The TM-DC trip unit gives you LI protection: thermal overload (L) and magnetic short-circuit (I), with the thermal curve calibrated for DC ripple and ambient temperatures up to 40 °C.
Deployment context — PV combiner and inverter protection
This breaker is designed for photovoltaic DC circuits — string combiners, inverter DC inputs, and battery storage interfaces. The IK07 impact rating handles accidental tool drops during commissioning.
