Rated interrupting capacity reaches 121 kA at 240 V AC, dropping to 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V.
Thermal derating curve
Derating begins at 55 °C (194 A), then 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. Panel ambient temperature inside the enclosure — not the room — is what determines the usable continuous current; a crowded cabinet at 60 °C knocks off 12 A from the nameplate.
The 140 mm width for a 4-pole frame is standard for SENTRON 3VA molded case breakers at this rating — verify the mounting footprint against the existing backplate or DIN-rail adapter before committing the panel layout. Maximum power dissipation is 42 W. In a sealed, non-ventilated enclosure that heat must be accounted for in the thermal budget; adjacent devices may need spacing or forced airflow.