The 3VA2325-5HN32-0CL0: The 250 A rating holds flat from 40 °C through 50 °C, then derates to 240 A at 55 °C, 235 A at 60 °C, 230 A at 65 °C, and 225 A at 70 °C. That thermal curve means the breaker carries its full nameplate in most ventilated enclosures; only above 50 °C ambient does the continuous current need adjustment, and the drop is gradual enough to plan around without oversizing. Power loss is rated at a maximum 40 W. In a densely packed distribution panel, that figure matters for thermal management — it's not negligible, so keep ventilation slots clear and avoid stacking breakers directly above without a baffle.
Deployment Context
This MCCB is a panel-mount device sized for distribution boards and motor control centers. Its dimensions — 110 mm depth, 138 mm width, 248 mm height — fit standard Siemens SENTRON mounting footprints, so it swaps into an existing 3VA panel cutout without re-drilling the backplate. The 3-pole form factor suits three-phase feeders, main incomers, or large motor branch circuits.