The Siemens SENTRON 3VA2440-5HL32-0BA0 is a 3-pole molded case circuit breaker rated for line protection, carrying a continuous current of 400 A across the full ambient range from 40 °C to 70 °C — no derating needed in a warm enclosure. Its interrupting capacity hits 187 kA at 240 V AC, 121 kA at 415/440 V, 75.6 kA at 500 V, and 9 kA at 690 V, giving you selectivity headroom well beyond typical 400 A service entrance or feeder duty.
The 400 A rating is thermally stable: the breaker carries 400 A continuously at any ambient from 40 °C up to 70 °C, which is unusual — many MCCBs start derating above 40 °C. That means you can mount it in a crowded, warm panel without losing ampacity. The interrupting ratings span the common industrial voltages: 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.
Integration — Panel Fit & Wiring
Dimensions are 248 mm height, 138 mm width, 110 mm depth — a standard SENTRON 3VA frame size that fits the same mounting footprint as other 3VA2 breakers. The 110 mm depth includes the handle and terminals, so check gland-plate clearance if the panel door is shallow. The auxiliary release is an undervoltage release (UVR) — wired separately from the main power path. It's a shunt-trip style that opens the breaker on loss of control voltage.