What the ratings mean for your panel
The SENTRON 3VA2225-7HN32-0HL0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C — that's the full load it can carry without tripping in a typical 40 °C panel environment. The interrupting capacity tells you the fault it can safely clear: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 4.5 kA at 690 V. That 330 kA at 240 V means it handles extreme short-circuit currents common on large transformer secondaries or high-capacity busways without welding contacts or rupturing the case. Temperature derating is real: the breaker holds its full 250 A up to 50 °C, then drops to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel runs hot — say near a row of drives or under a roof in summer — you need to account for that reduction, not the nameplate 250 A. Maximum power loss is 48 W, which adds to the enclosure thermal budget. This is a line-protection design — it protects cables and busbars, not motors or people. The auxiliary switch complement includes 2 auxiliary switches plus a trip alarm and an electrical alarm switch (HQ type), plus a shunt trip release (STL) for remote tripping. No undervoltage release, no ground-fault monitoring, no communication function. It's a straightforward high-current feeder breaker.
Mounting and integration
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that fits most 600 V panelboards and switchboards. The basic switch variant is 3VA2225-7HN32-0AA0, meaning the 0HL0 suffix adds the shunt trip and auxiliary alarm contacts. No special cutout or adapter needed for a standard DIN-rail or bolt-on mounting plate.