The Siemens SENTRON 3VA2325-5MN32-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 250 A at 40 °C, built around the ETU350M electronic trip unit with an integrated shunt trip release. It carries an interrupting rating of 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 500 V — numbers that tell you this breaker is sized for high-fault industrial distribution, not light commercial panels.
Ratings and what they mean for your panel
The 250 A rating holds steady from 40 °C up to 50 °C, then derates gradually to 225 A at 70 °C — so if your panel runs hot near the top of that range, you still have 225 A of continuous capacity without tripping. The interrupting ratings across voltage levels are what you need for selectivity studies: 187 kA at 240 V covers most low-voltage service-entrance fault levels, while the 17 kA at 690 V still handles substantial faults on 600 V class systems. This breaker includes phase failure detection and a shunt trip release (cataloged separately as 3VA9688-0BL32) for remote tripping — useful on motor circuits where you need to drop the breaker on a loss-of-phase or an E-stop signal. The ETU350M trip unit is adjustable, giving you flexibility to coordinate with downstream devices without swapping the breaker.
Mounting and integration
The breaker measures 248 mm high, 138 mm wide, and 110 mm deep — a standard SENTRON 3VA fixed-format footprint that bolts into a switchboard or panel-mount chassis. It accepts busbar or cable connections and carries auxiliary contact slots (sold separately) for status feedback to a PLC or SCADA.