What this MCCB delivers
The Siemens 3VA2440-6HN32-0AC0 is a SENTRON molded case circuit breaker rated for 400 A continuous current (Iu) with an ETU350 electronic trip unit. Three poles, line protection version.
Breaking capacity across voltage levels
Breaking capacity is 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V. That 242 kA at 240 V covers high-fault utility feeds; the 40 kA floor at 690 V still handles most industrial motor branch circuits. Rated insulation voltage is 800 V.