400 A MCCB with flat thermal curve and high interrupting capacity
The Siemens SENTRON 3VA2440-6HL32-0JC0 is a 3-pole molded case circuit breaker rated for line protection, carrying 400 A continuously across the full 40 °C to 70 °C ambient range without derating. Its interrupting capacity reaches 242 kA at 240 V and 187 kA at 415 V and 440 V, dropping to 121 kA at 500 V and 9 kA at 690 V. The maximum interrupting rating is 4 800 A, with a minimum of 600 A.
Dimensions of 110 mm depth, 138 mm width, and 248 mm height fit standard SENTRON panel cutouts; verify busbar alignment for the 3-pole footprint. Maximum power loss of 63.5 W should be factored into enclosure thermal calculations.