Breaking capacity across voltage levels
This MCCB delivers 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V.
Temperature derating — the real-world current limit
Above that it steps down: 240 A at 55 °C, 235 A at 60 °C, 230 A at 65 °C, and 225 A at 70 °C.
The 3 auxiliary switches HQ are built into the breaker — no separate aux block to mount. The ETU320 release is adjustable; the basic switch supplied is 3VA2325-5HL32-0AA0, and the integrated auxiliary trip is 3VA9608-0BB24. No undervoltage release, no voltage trigger, no communication function — this is a straightforward line-protection breaker without add-on modules.
