Siemens SENTRON 3VA2225-6HN42-0AA0 — 250 A 4-Pole MCCB with ETU350
Breaking capacity is 242 kA at 240 V AC, dropping to 187 kA at 415 V and 440 V, and 121 kA at 500 V — enough to handle high-fault utility feeds or transformer secondaries. At 690 V it still interrupts 4.5 kA, covering most industrial motor circuits.
Front protection is IP40, so the breaker face is protected against tools and small debris but not washdown. Power loss is 48 W maximum at rated current — factor that into enclosure ventilation, especially when multiple breakers are ganged in a single section.
Trip unit and protection features
The ETU350 electronic trip unit supports LSIG protection (long-time, short-time, instantaneous, and ground-fault) but this variant ships without ground-fault monitoring. No undervoltage release, no voltage trigger, and no communication function are fitted on this order code.