The Siemens 3VA2325-7MN32-0HH0 is a SENTRON molded case circuit breaker (MCCB) rated at 250 A continuous, 3-pole, designed specifically for motor protection. It carries a full-load current rating that holds flat from 40 °C through 70 °C ambient — no derating curve to chase in a hot panel, which is unusual for this class and saves a panel-builder headache when the enclosure sits next to a furnace line. Breaking capacity hits 330 kA at 240 V AC, dropping to 242 kA at 415 V and 440 V, then 187 kA at 500 V, and 7.5 kA at 690 V. That 330 kA figure at 240 V covers the worst-case fault current on a transformer secondary or a large motor starter lineup — the kind of fault that would vaporize a standard industrial MCB. The 690 V rating (7.5 kA) is lower but still sufficient for most 690 V distribution boards where the available fault current is typically under 10 kA.
Motor protection and auxiliary layout
Built-in phase failure detection means the breaker trips on loss of one phase — critical for a motor load because a single-phased motor draws locked-rotor current on the remaining phases and burns out fast. No separate phase-loss relay needed in the panel; the MCCB handles it internally. Auxiliary switch complement is 2 auxiliary switches plus 1 trip alarm switch HQ, and a shunt trip release (STL) is fitted. That gives remote trip capability and status feedback — useful for an E-stop chain or a PLC-driven shutdown sequence where you need to know the breaker tripped vs. being manually opened. The shunt trip also lets you integrate the MCCB into a safety circuit without adding an external contactor.
Dimensions and panel fit
Physical footprint: 138 mm wide, 248 mm tall, 110 mm deep. That 138 mm width is a standard 3-pole MCCB form factor for this current class — it fits the same cutout and bus-bar spacing as the earlier 3VA2 generation. The 110 mm depth includes the rear arc chamber, so verify gland-plate clearance if the panel is shallow.
Environmental and operating range
Operating temperature spans -25 °C to 70 °C, with storage from -40 °C to 80 °C. The flat 250 A derating across the full operating range (–) means this breaker can sit in a non-air-conditioned panel in a Middle East plant or a freezer warehouse without needing a higher-rated frame. Maximum power loss is 37.5 W — plan for that heat in a sealed enclosure.