The Siemens 3VA2463-6HL32-0KA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying 630 A at 40 °C across three poles. That 630 A figure is the continuous current the breaker can carry without tripping under normal conditions — it sets the maximum load for the feeder or main it protects. The ETU320 electronic trip unit inside gives adjustable overload and short-circuit protection curves, so you can dial in coordination with downstream breakers rather than relying on fixed thermal-magnetic characteristics.
Breaking capacity across voltages
This MCCB delivers 242 kA interrupting capacity at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V. Those numbers are the fault currents it can safely clear at each voltage level — critical for SCCR compliance on the line side of a panel. If your available fault current at the service entrance is, say, 100 kA at 480 V, this breaker gives you headroom well above that.
Thermal derating and ambient limits
The 630 A rating holds at 40 °C ambient inside the enclosure. Above that, current must be derated: 612 A at 45 °C, 593 A at 50 °C, 575 A at 55 °C, 557 A at 60 °C, 538 A at 65 °C, and 520 A at 70 °C. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. If the panel sits near a heat source or in a hot plant environment, use the 50 °C or 60 °C row for sizing.
Integrated shunt trip and auxiliary release
This variant includes a shunt trip (STL) release for remote tripping — voltage trigger capable, so a control signal from a safety relay or PLC can open the breaker. The integrated auxiliary trip is order code 3VA9688-0BL33. No undervoltage release, no auxiliary contact, no ground-fault monitoring, no communication function, no phase-failure detection. If you need remote status feedback or undervoltage protection, you'll add those as separate accessories.
Physical fit and panel integration
Dimensions: 248 mm high, 138 mm wide, 110 mm deep. Three-pole footprint — standard for a 630 A MCCB in a distribution panel. Mounts via screw terminals; no DIN-rail clip on this frame size. The 162 W maximum power loss at full load means ventilation or derating may be needed in a sealed enclosure.