The Siemens SENTRON 3VA2340-6JP32-0HL0 is a 3-pole molded case circuit breaker rated for 400 A continuous current from 40 °C through 50 °C ambient — no derating needed in a typical ventilated enclosure. At 240 V it interrupts 242 kA, which covers most utility-transformer fault currents without cascading upstream breakers. This is a line-protection design — it protects cables and busbars, not motor overloads. The built-in communication function means it can talk to a higher-level system for metering or remote trip indication, which saves adding a separate power meter on the same feeder. The auxiliary switch complement (2 aux + 1 trip alarm + 1 electrical alarm HQ) gives enough status feedback for a PLC input card without extra interposing relays.
Breaking capacity by voltage — where it fits
Breaking capacity varies sharply with system voltage: 242 kA at 240 V, 187 kA at both 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V. At 400/415 V distribution panels it handles most industrial fault levels comfortably.
The 138 mm width occupies three 45 mm module spaces — plan your gland plate and busbar takeoff accordingly. The shunt trip (STL) release is built in, and the undervoltage release is absent — if your safety circuit requires a UVR, you need the -0HL0 variant with that option or add an external undervoltage relay.