Siemens 3VA2325-6HN32-0KA0 — 250 A MCCB with Shunt Trip
The Siemens SENTRON 3VA2325-6HN32-0KA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, designed for line protection in distribution panels and industrial switchgear. It carries a shunt trip release (STL) for remote tripping, making it suitable for emergency-off or interlock circuits where a control signal must open the breaker independently of the overload or short-circuit mechanism. Breaking capacity is 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V — figures that place it in the high-interrupting category for industrial feeders and large motor branch circuits. The 250 A frame carries the same rating across the full 40 °C to 70 °C ambient range, so no derating is needed in a warm enclosure as long as the ambient stays within that band. Power loss at rated current is 37.5 W maximum — a figure to factor into enclosure thermal calculations, especially in a densely packed panel. The breaker measures 248 mm high by 138 mm wide by 110 mm deep, fitting standard Siemens SENTRON mounting footprints.
Integration and Mounting
Mounts on a DIN rail or direct panel-mount via the SENTRON base plate. The 110 mm depth leaves clearance behind a standard 200 mm deep enclosure; the 138 mm width occupies three pole positions on a DIN-mounted busbar system. No auxiliary switch is fitted on this variant — the shunt trip is the only auxiliary release — so any remote status indication requires an add-on auxiliary switch block. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The wide storage span matters for spares held in unheated warehouses or site containers.