Its breaking capacity reaches 121 kA at 240 V AC and holds 75.6 kA at 415 V, tapering to 11.9 kA at 690 V — so it clears high-fault scenarios on the low-voltage side while maintaining adequate interruption for 400 V-class industrial feeds. Rated current holds flat at 20 A from 40 °C through 55 °C, then derates to 19 A at 60–70 °C (–). That means no de-rating penalty in a typical 50 °C panel interior, but you lose 1 A if the enclosure runs hot. Maximum power loss is 14.5 W — a modest thermal load for a 3-pole MCCB in a ventilated section.
Built-in undervoltage release and dual auxiliary switches
The UVR drops the breaker on loss of control voltage — standard for safety circuits where a downstream motor starter must not re-energize unattended. The trip indicator gives a local mechanical flag showing the breaker tripped on fault versus manual off — useful for a technician walking a line-down panel to quickly identify the faulted circuit.
At 76.2 mm wide, 130 mm tall, and 70 mm deep, this MCCB occupies a standard 3-pole footprint for the 3VA platform. It mounts via screw-clamp to a backplate or DIN rail adapter (not included).