The ETU860 electronic trip unit handles the overcurrent release, so you get adjustable protection curves, not a fixed thermal-magnetic snap.
Breaking capacity — the number that decides the bus
The headline here is the interrupting rating: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. That's a high-energy breaker — it's meant for main or feeder positions where fault current can pile up from multiple transformers or motor contributions. For a panel builder, that means this breaker sits at the head of a distribution board, not in a branch circuit.
What the ETU860 release gives you
That ground-fault function is built into the release, not an add-on module. It communicates (communication function is present), and there's an optional motor drive available for remote charging. The power loss is a minimal 0.5 W at rated current, which keeps the interior of the MCCB cool over its service life.
It's an active catalog item in the SENTRON 3VA2 family. For a BOM line, that means you can specify it without worrying about a last-time-buy window.