What this MCCB delivers
The Siemens 3VA2440-6HN32-0KC0 is a 3-pole SENTRON molded case circuit breaker rated for 400 A continuous current across its full operating temperature range of -25 °C to 70 °C, meaning no derating is needed even in a hot panel — a real advantage when the enclosure sits near a furnace or in a non-climate-controlled plant area. The frame is sized for 4800 A, giving headroom for high-fault installations. Breaking capacity reaches 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V — figures that cover most industrial low-voltage distribution systems. Short-time withstand is 5 kA for 1 s, which supports selective coordination downstream.
Built-in accessories and integration
This MCCB ships with a shunt trip (STL) for remote tripping and two HQ auxiliary switches for status feedback — both factory-fitted, so no field wiring of add-on modules. The basic switch variant is 3VA2440-6HN32-0AA0. No undervoltage release or ground-fault monitoring is included. Dimensions are 248 mm high, 138 mm wide, 110 mm deep — a standard SENTRON 3VA footprint that fits existing panel cutouts and busbar layouts without rework. Maximum power loss is 63.5 W, which should be factored into enclosure thermal calculations.