At 240 V this MCCB clears 187 kA symmetrical — that's the kind of fault current you see close to a large transformer secondary. At 415 V it still manages 121 kA, and at 500 V it's 75.6 kA. The 690 V rating drops to 3 kA, which tells you this breaker is sized for 240–500 V systems, not 690 V feeders.
Ground-fault and communication features
This variant includes ground-fault monitoring via summation current formation on the L + N conductor — it watches for leakage between phase and neutral, not just phase-to-ground. It also has a communication function, so it can talk to a higher-level system for status or trip indication.
Panel fit
The 4-pole width (140 mm) is the same as other 3VA 4-pole frames, so it swaps into existing SENTRON cutouts without re-drilling.