The Siemens SENTRON 3VA2440-5HN32-0HA0 is a molded case circuit breaker (MCCB) rated for 400 A continuous current across a 3-pole configuration, with an ETU350 electronic trip unit and an integrated shunt trip (STL) release. Breaking capacity scales with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V — the 240 V figure tells you it handles high-fault utility feeds; the 690 V number is where you check coordination with downstream gear. Current rating holds flat at 400 A up to 50 °C, then derates to 384 A at 55 °C, 376 A at 60 °C, 368 A at 65 °C, and 360 A at 70 °C — if the panel ambient sits above 50 °C, the 360 A floor at 70 °C is the number to size against.
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — the 138 mm width is the standard 3-pole MCCB footprint for SENTRON 3VA; verify the gland-plate cutout if retrofitting into a panel originally cut for a narrower frame. Maximum power loss is 63.5 W — that heat has to leave the enclosure; factor it into the panel thermal budget, especially in a sealed stainless cabinet. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limit governs handling and warehousing, not running duty.
The ETU350 electronic trip unit provides adjustable overload and short-circuit protection curves, with a voltage trigger present for remote signaling. No auxiliary contacts, no communication module, no ground-fault monitoring are integrated into this variant. The shunt trip (STL) release allows remote tripping via a control voltage — the integrated auxiliary trip order code is 3VA9688-0BL30, and the supplied basic switch is 3VA2440-5HN32-0AA0.