Siemens 3VA2225-6HN32-0AF0 — 250 A SENTRON MCCB with ETU350
Breaking capacity reaches 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 6 kA at 690 V — figures that govern selectivity and SCCR coordination in a distribution panel. The 250 A rating holds steady through 50 °C, then derates to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. Dimensions are 181 mm high, 105 mm wide, and 86 mm deep — a footprint that fits standard SENTRON 3VA panel cutouts and busbar risers. Front protection is IP40; the unit includes one auxiliary switch and one trip alarm switch (HQ type).
Integration notes
Mounts on a DIN rail or direct panel base within the SENTRON 3VA family. The ETU350 electronic trip unit allows adjustable overload and short-circuit protection curves; no undervoltage release or ground-fault monitoring is fitted on this variant. Maximum power loss is 48 W, which should be factored into enclosure thermal calculations.