Its headline breaking capacity is 220 kA at 240 V, dropping to 154 kA at 415 V and 121 kA at 440 V — these numbers tell you it handles high-fault utility feeds or transformer secondaries where upstream short-circuit current can exceed 100 kA. Current rating holds at 16 A from 40 °C through 55 °C ambient; at 60 °C it derates to 15 A and stays there through 70 °C. That means in a warm panel — say 50 °C inside the enclosure — you still get the full 16 A without derating the breaker. Power loss is 10.6 W max, which matters for heat buildup in a dense cabinet. The I-trip is adjustable, so you can fine-tune the thermal pickup without swapping the breaker.
Four-pole form factor means it occupies the same width as a standard 4-pole MCCB — no surprise when swapping into an existing SENTRON or third-party panel.