Its interrupting capacity reaches 187 kA at 240 V and 121 kA at 415 V, with a 7.5 kA floor at 690 V — so it handles high-fault utility feeds without cascading upstream.
At 415 V it still holds 121 kA, dropping to 75.6 kA at 500 V and 7.5 kA at 690 V. The thermal continuous rating is 400 A from 40 °C through 50 °C; above that it derates to 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. For a panel that runs warm — say 55 °C ambient inside the enclosure — you lose 25 A of headroom, so size the upstream transformer or bus accordingly.
Integrated accessories and communication
It also includes an undervoltage release (voltage trigger) for undervoltage protection. The base switch itself is order code 3VA2340-5JQ32-0AA0; the -0HC0 suffix adds the releases and aux switches.
The 138 mm width (5.43 in) means it occupies three standard 45 mm pole spaces on a DIN rail — verify your backplate layout if swapping from a different frame.