It is designed for starter protection — meaning it handles the high inrush and overload profile of motor starters — and carries a maximum breaking capacity of 330 kA at 240 V, dropping to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. The trip unit is electronic, not thermal-magnetic, so it offers adjustable long-time, short-time, and instantaneous pickup settings — useful for coordinating with downstream motor-protective devices.
The ETU310M trip unit supports adjustable overload and short-circuit protection, but this variant lacks undervoltage release, shunt trip, ground-fault monitoring, communication, phase-failure detection, and a trip indicator — so if your panel requires any of those, you need a different suffix. Power loss is 10 W maximum, which matters for enclosure thermal budgeting.
The 3-pole footprint is standard for SENTRON 3VA2 frame size; if you are swapping into a panel originally wired for a 3VA2110-7HK42-0AA0, the physical dimensions are identical — same frame, same pole count — so no re-drilling or re-wiring of the bus bars is needed, provided the trip unit and accessory configuration match your circuit.