The Siemens SENTRON 3VA2340-5JP32-0KA0 is a 3-pole molded case circuit breaker rated for 400 A continuous current, designed for line protection in distribution panels.
Breaking capacity and SCCR
The interrupting ratings span the voltage range: 187 kA at 240 V, 121 kA at both 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V.
Thermal derating
The breaker holds its full 400 A rating from 40 °C up to 50 °C. Above that, it derates linearly: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. If your panel ambient runs hot — say, a packed enclosure with drives — plan for that 300 A floor at 70 °C rather than the nameplate 400 A.
Physical fit and mounting
Dimensions are 248 mm high, 138 mm wide, and 110 mm deep.