It carries a 330 kA interrupting capacity at 240 V, derating to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V — the steep drop above 500 V means the unit is optimized for low-voltage distribution up to 500 V, not for 690 V systems where the SCCR falls below typical motor-starting fault levels.
Motor Protection and Phase Failure Detection
This MCCB is built for motor protection duty — the thermal-magnetic trip curve is matched to motor inrush and locked-rotor profiles, not general distribution. Maximum power loss is 10 W, manageable for DIN-rail density without forced ventilation. It ships with three HQ auxiliary switches integrated into the basic switch assembly (: 3VA21107MN360AA0), providing status feedback for remote monitoring or PLC interlocking without an add-on module.
