The Siemens SENTRON 3VA2440-7HL32-0AE0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection. It carries a continuous current rating of 400 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel sizing in warm enclosures. The interrupting capacity hits 330 kA at 240 V and still holds 242 kA at 415 V and 440 V, so it handles high-fault utility feeds without cascading upstream. Maximum current is 4800 A, with a minimum setting of 600 A, giving flexibility for downstream coordination.
Dimensions and integration
The breaker measures 248 mm high, 138 mm wide, and 110 mm deep. That 110 mm depth (4.33 in) is the dimension that matters for enclosure depth.
Auxiliary switching and power loss
This order code includes four HQ auxiliary switches (design of the auxiliary switch: 4 auxiliary switches HQ), which give status feedback for remote monitoring or PLC inputs — useful for tracking breaker state without climbing into the panel. Maximum power loss is 63.5 W, which should be factored into enclosure thermal calculations if the panel is densely populated. The breaker has no communication function or trip indicator, so it's a straightforward thermal-magnetic or electronic trip unit (the spec doesn't specify the trip type, but the line protection designation suggests an electronic trip for the 400 A frame).