What this MCCB carries
The Siemens SENTRON 3VA2440-6HL32-0CH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous 400 A at ambient temperatures from 40 °C through 70 °C without derating — that is a full-temp-rated frame, not one that forces a downsized cable at the top of the enclosure. Interrupting capacity is the headline: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. At the typical 480Y/277 V distribution level the breaker clears 187 kA symmetrical — that is a high-fault-current frame suited for large switchboards or transformer secondaries where SCCR headroom matters. The adjustable thermal-magnetic trip range spans 600 A minimum to 4 800 A maximum, giving the specifying engineer selectivity tuning across a wide feeder range without swapping the breaker body.
Built-in accessories
This variant ships with an undervoltage release (UVR) factory-installed, plus two auxiliary switches and one trip alarm switch (HQ) — enough for remote status indication and safety-circuit drop-out without adding external relay logic. The base switch is the 3VA2440-6HL32-0AA0; this order code adds the UVR and the HQ contact block. No communication module on this version — it is a hardwired breaker for conventional control panels. Dimensions are 248 mm high, 138 mm wide, 110 mm deep — a standard SENTRON 3VA frame footprint that drops into existing panel cutouts without rework.
Lifecycle and sourcing
Maximum power loss is 66 W; plan for thermal dissipation in a sealed enclosure. Storage range is -40 °C to 80 °C; operating range is -25 °C to 70 °C.