The Siemens 3VA2440-5HN32-0DC0 is a 3-pole SENTRON molded case circuit breaker sized for a 4800 A frame with a continuous current rating of 400 A across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. Breaking capacity lands at 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V.
Integration dimensions
Footprint: 138 mm wide, 248 mm tall, 110 mm deep. Standard DIN-rail or panel-mount installation per SENTRON 3VA family practice.
Power loss and thermal budget
Maximum power loss is 66 W. In a sealed enclosure that figure drives the internal temperature rise; account for it in the thermal budget alongside the 70 °C maximum operating ambient.