The Siemens SENTRON 3VA2450-7MN32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for 500 A continuous current at 40 °C ambient — that's the full 500 A from 40 °C through 50 °C, then it derates smoothly to 480 A at 70 °C. For a cement plant control room or kiln-side MCC, that thermal curve means you can load it to nameplate in a ventilated enclosure; if the panel sits near a preheater tower where ambient hits 60 °C, you still have 490 A of headroom before the bimetal starts tracking. Breaking capacity is 330 kA at 240 V, 242 kA at 415/440 V, and 187 kA at 500 V — numbers that put it in the high-interrupting class for motor protection. At 690 V it still clears 15.3 kA, which covers most industrial service-entrance faults. The short-time withstand (1 s limited) is 6 kA, so you can coordinate it downstream of a larger feeder breaker for selective tripping. The UVR drops the breaker if control voltage falls below the dropout threshold, which is standard for conveyor or kiln-drive circuits where a voltage sag should trip rather than let the motor single-phase. No communication module, no trip indicator — this is a straightforward thermal-magnetic protector for fixed-speed motor loads.
Maximum power loss is 101.5 W at rated load. In a sealed, high-ambient enclosure (say, a non-ventilated panel near a kiln), that heat must be factored into the thermal budget — forced ventilation or a larger enclosure may be needed to stay within the 70 °C operating max.