SENTRON 3VA2440-5HN32-0AB0 — 400 A MCCB, 4800 A frame, line protection
The Siemens 3VA2440-5HN32-0AB0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 400 A across its full ambient temperature range from 40 °C to 70 °C without derating — a clean thermal curve that simplifies panel sizing in warm enclosures. The 4800 A frame size supports a maximum breaking capacity of 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V — so the same unit covers both high-fault commercial services and lower-fault industrial distribution without a frame change. Three-pole construction with a 63.5 W maximum power loss at rated load; the auxiliary switch bay carries two HP auxiliary switches as standard, with no undervoltage release, ground-fault monitoring, or communication module fitted from the factory.
Panel fit — dimensions and integration
Footprint: 138 mm wide, 248 mm tall, 110 mm deep — a standard SENTRON 3VA form factor that mounts on a DIN rail or panel-mount adapter in a distribution board or motor control center. Operating temperature range from -25 °C to 70 °C, storage from -40 °C to 80 °C — suitable for unconditioned enclosures in most industrial and utility environments.