SENTRON 3VA2440-6HL32-0JL0 — 400 A MCCB for high-fault line protection
The Siemens SENTRON 3VA2440-6HL32-0JL0 is a 3-pole molded case circuit breaker rated for 400 A continuous current across its full ambient range from 40 °C to 70 °C — meaning no derating needed in a warm enclosure or near other heat sources on the DIN rail.
What the interrupting ratings mean on a real panel
At 500 VAC the breaker still interrupts 121 kA, which covers most 480 V distribution in industrial plants; at 690 VAC it drops to 9 kA, so on a 690 V line you need to verify the available fault current is under that threshold — common in mining or marine installations where the transformer impedance limits the fault.