The Siemens SENTRON 3VA2225-6JP32-0JL0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with a breaking capacity of 242 kA at 240 VAC. The basic switch core is order code 3VA2225-6JP32-0AA0.
At 500 V the rating drops to 121 kA; at 690 V it holds 4.5 kA, which still covers most 690 V distribution faults. For a site electrical engineer sizing selective coordination, the 250 A continuous frame and the 375 A minimum to 2 500 A maximum trip range give enough band to coordinate with downstream 100 A or 160 A MCCBs.
Above that it derates linearly: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. Maximum power loss is 48 W. A panel OEM should account for the 48 W heat dissipation in the enclosure thermal budget, especially when grouping multiple breakers.
