What this MCCB carries — and what it means on the line
The Siemens 3VA2325-5MN32-0KA0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current, sized for motor protection duty with an ETU350M electronic trip unit. It breaks 187 kA at 240 V and 121 kA at 415 V — numbers that tell you it handles high fault currents without cascading upstream, which is the whole point of an MCCB in a distribution panel. The 250 A rating holds flat from 40 °C through 50 °C, then derates to 230 A at 65 °C and 225 A at 70 °C. That means in a warm panel — say 55 °C ambient — you still get 240 A of headroom, so you are not forced to oversize the frame just for thermal margin. The integrated shunt trip (design code STL) lets you remotely trip the breaker from a safety circuit or emergency-stop chain. No auxiliary contacts on this variant — the trip indicator is also absent — so if you need remote status feedback, you will add the separate auxiliary switch block later.
Breaking capacity by voltage — where it fits
The 187 kA at 240 V and 121 kA at 415 V put this MCCB in the high-interrupting category for a 250 A frame. At 500 V it still clears 75.6 kA; at 690 V it drops to 17 kA. If your installation sees fault currents above those numbers at the respective voltage, you need a current-limiting upstream device or a larger frame. The 800 V rated insulation voltage (Ui) confirms it is rated for 690 V systems with margin. The 3-pole format and 250 A frame mean it bolts into standard MCCB mounting footprints. Depth of 110 mm, width 138 mm, height 248 mm — check your enclosure gland plate clearance, especially if you are retrofitting into an existing panel that was dimensioned for a smaller frame.