The Siemens 3VA2440-5KQ32-0DF0 is a 3-pole IEC frame 630 molded case circuit breaker with a 400 A nominal rating and an Icu of 55 kA at 415 V — that is the maximum short-circuit current it can safely interrupt without damage, so it belongs in a main or feeder position where fault current is high enough to cook a lesser breaker. The ETU860 trip unit gives you LSIG protection — long-time (overload), short-time, instantaneous, and ground-fault — with adjustable Ir from 160 A to 400 A, Isd from 0.6 to 10 x In, and Ii from 1.5 to 15 x In. Ground-fault pickup Ig is adjustable from 0.2 to 1 x In with a time delay tg of 0.05 to 0.8 s, which lets you coordinate downstream without nuisance tripping on motor inrush.
We source and quote the 3VA2440-5KQ32-0DF0 to order against an RFQ.