What this 250 A MCCB does on the line
Breaking capacity runs 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V — enough headroom for high-fault utility feeds or transformer secondaries without cascading upstream.
Full 250 A rating holds through 50 °C ambient; above that it derates stepwise: 240 A at 55 °C, 235 A at 60 °C, 230 A at 65 °C, 225 A at 70 °C. Maximum power loss is 37.5 W — modest for a 250 A frame, but cluster several breakers in a sealed enclosure and the heat adds up. Account for it in the thermal design.
For a critical-spare holding or a BOM freeze, this is the one to put in the cabinet before it fails. No substitute needed; the 3VA2325-6HL32-0HH0 is the active build.
The breaker measures 110 mm deep, 138 mm wide, and 248 mm tall.
The integrated auxiliary trip (shunt release) is order code 3VA9688-0BL30; the supplied basic switch is 3VA2325-6HL32-0AA0. Both are factory-installed, not field-retrofit items.