Siemens 3VA2440-7HL32-0DC0 SENTRON MCCB — 400 A, 3-pole line protection with UVR
The Siemens 3VA2440-7HL32-0DC0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 400 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to the 70 °C operating limit. That 400 A holds steady at every temperature step from 40 °C through 70 °C, so it fits tightly into a warm panel without losing capacity. Breaking capacity is 330 kA at 240 V, dropping to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 9 kA at 690 V. The 4800 A maximum rating and 600 A minimum define the adjustable trip band — this breaker is sized for high-fault industrial mains or large feeder circuits, not branch protection. It is designed for line protection (not motor or generator protection), with an integrated undervoltage release (UVR) and two auxiliary switches HQ. The basic switch is order code 3VA2440-7HL32-0AA0. No communication function or ground-fault monitoring is included — this is a straight thermal-magnetic MCCB with a UVR for safety disconnects.
Panel fit and mounting
Dimensions are 248 mm height, 138 mm width, 110 mm depth — a standard 3-pole MCCB footprint for SENTRON 3VA2 frames. Mounts on a DIN rail or directly to a backplate; the 110 mm depth leaves clearance for rear-connected busbars in a typical 600 mm deep enclosure. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 66 W — account for that heat in the panel thermal budget, especially when grouping multiple breakers.