Siemens 3VA2225-7HL32-0HL0 — SENTRON MCCB, 250 A, Line Protection
Breaking capacity is specified across multiple voltage levels: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 6.3 kA at 690 V. These figures place it in the high-interrupting-capacity class for industrial distribution — it clears severe fault currents without cascading to upstream protective devices. Thermal derating is published from 40 °C through 70 °C: the breaker carries the full 250 A up to 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. For a panel with an ambient above 50 °C, the actual continuous current capability drops — factor this into the load schedule rather than relying on the und derated nameplate.
The 3-pole unit occupies a standard 105 mm width slot in a panel layout — verify the existing busbar and cable lug spacing against the terminal centers before committing the BOM. Maximum power loss is 48 W at rated current.
Trip Unit & Auxiliary Functions
The shunt trip (STL) release allows remote opening via a control voltage — useful for emergency-stop circuits or interlocking with upstream breakers. A voltage trigger is present, and the trip indicator provides local mechanical flag indication of a trip event. No communication function or phase failure detection is integrated — this is a standalone protection device, not a networked power meter.