63 A that doesn't flinch at 70 °C
The interrupting capacity is the other headline: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 53 kA at 690 V. Those numbers mean this breaker can sit at the main service entrance or on a high-fault industrial feeder without worrying about cascading failure upstream. The 4-pole configuration (three phases plus switched neutral) makes it a natural fit for three-phase systems where you need neutral protection.
ETU340 trip unit — what it does for you
That adjustability lets you coordinate selectively with downstream breakers — set the pickup high enough to ride through motor inrush and low enough to clear a bolted fault before the upstream main trips. The N-conductor protection is adjustable OFF or 100%, so you can match the neutral rating to the phase rating or disable it on a balanced load.
A motor drive option is available as a field-installable accessory, so you can add remote motor operation later without replacing the breaker.