What this 250 A MCCB delivers in the panel
It's built for line protection — meaning it sits at the feeder or main distribution point, not downstream on motor or branch circuits. The breaking capacity is 121 kA at 240 V and 75.6 kA at 415 V, so it handles high-fault utility connections without cascading upstream.
Current derating and thermal reality
Above that, it derates: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C. The TM240 release is fixed; there's no electronic adjustment or communication module on this variant.
Mounting and integration notes
Dimensions: 105 mm wide, 158 mm high, 70 mm deep. It's a panel-mount MCCB — no DIN-rail clip, so budget for a mounting plate and screw-down lugs. The shunt trip (STL) auxiliary release is included (order code 3VA9688-0BL33 for the integrated trip unit if you need a spare). No auxiliary contacts, undervoltage release, or ground-fault monitoring on this build. If you need those, you're looking at a different version of the 3VA platform.