The Siemens SENTRON 3VA2225-7HN32-0BA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with a maximum interrupting capacity of 330 kA at 240 V. This is the line-protection variant, designed for main feeder or large subfeed applications in commercial and industrial distribution panels. The 250 A frame is the full-rated continuous current — no derating needed at 40 °C, though above 55 °C the rating steps down to 241 A and continues to 213 A at 70 °C. That thermal behavior matters if this breaker lands in a non-climate-controlled enclosure next to transformers or drives.
The interrupting capacity is what makes this breaker distinct: 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. Those numbers mean it can handle high-fault-current scenarios like transformer secondaries or large motor control centers where upstream coordination demands a high IC. The 690 V figure drops sharply — 4.5 kA — so if your system runs at that voltage, verify the available fault current stays under that limit. The 3VA2225 frame carries an undervoltage release (UVR) as standard, which is the -0BA0 suffix: the release trips the breaker when voltage drops below a set threshold, a common requirement for emergency-stop or safety-disconnect circuits. Power loss at rated current is 50.5 W, which should be factored into enclosure thermal calculations.
Dimensions are 181 mm height, 105 mm width, 86 mm depth. The 105 mm width is a 3-pole MCCB standard footprint — fits most Siemens SENTRON mounting plates and panelboard interiors. The 86 mm depth includes the handle and terminals; allow extra clearance for cable bending radius on the line and load lugs. No auxiliary switch is fitted as standard (design without), so if remote status indication is needed, a separate auxiliary switch block must be added to the breaker. The undervoltage release is wired separately from the main power path — confirm control voltage matches the UVR coil rating before commissioning.