Breaking capacity is the headline here: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. The trip indicator is absent (no), and the voltage trigger is also absent — this is a plain line-protection breaker, not a switch-disconnector with auxiliary signaling. The ETU320 is a basic electronic trip unit; it gives you adjustable thermal and magnetic settings but no fancy communication or measurement functions.
Panel fit and thermal derating
The IP40 front protection means it's suitable for indoor panels where tools or fingers won't contact live parts; no washdown rating here. That's unusual — most breakers start derating above 40 °C. Here, the ETU320 compensates electronically, so you don't lose capacity in a hot panel.