SENTRON 3VA2325-5MN32-0KH0 — 250 A Motor Protection MCCB
The Siemens 3VA2325-5MN32-0KH0 is a SENTRON-series molded case circuit breaker (MCCB) designed specifically for motor protection, with a full 250 A rating that holds flat across the entire 40 °C to 70 °C ambient range — no derating curve to manage in a warm panel. Three-pole construction with phase failure detection built in, plus a shunt trip (STL) auxiliary release and a 2-auxiliary-switch + 1 trip alarm switch configuration (HQ) for status feedback to a PLC or safety relay. Interrupting capacity hits 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V — that 187 kA figure means it can sit upstream of a high-fault transformer secondary without needing a current-limiting fuse ahead of it.
Panel Fit and Mounting
Footprint is 138 mm wide × 248 mm tall × 110 mm deep — a standard 3-pole MCCB envelope that fits existing SENTRON 3VA cutouts and busbar systems without re-drilling the backplate. The basic switch variant is 3VA2325-5MN32-0AA0; this order code adds the shunt trip and auxiliary switch block, so the depth clearance needs to accommodate the STL actuator — 110 mm is the installed depth with the aux block fitted.
Specs That Matter for the BOM Line
Power loss at rated load is 37.5 W maximum — relevant for thermal budgeting in a sealed enclosure; the trip indicator and voltage trigger are present, so you get local visual trip indication and a remote signal without an add-on module. Operating temperature range is -25 °C to +70 °C, storage from -40 °C to +80 °C — the 70 °C operating ceiling matches the flat 250 A rating, so no derating needed even at the top of the band. Short-time delay adjustable from 4 s minimum to 17 s maximum — this is the I²t withstand time for selective coordination downstream; a 17 s delay lets downstream breakers clear before this unit trips, keeping the rest of the bus live.