Breaking capacity across voltages
The interrupting rating drops as voltage climbs: 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. That 3 kA figure at 690 V is a hard limit — if your system runs 690 V with higher available fault current, this breaker won't clear it and you need a higher-rated frame. The 242 kA at 240 V is the headline number, but the 187 kA at 415 V is what most European 400 V panels will actually see.
Thermal performance and panel fit
It also carries two auxiliary switches plus a separate trip alarm switch (HQ configuration), so you get status feedback for open/closed and tripped states without adding external modules. No communication function onboard, no ground-fault monitoring — this is a straight line-protection breaker with hardwired signals.