The Siemens 3VA2450-5MN32-0KL0 is a SENTRON molded case circuit breaker (MCCB) rated 500 A continuous at 40 °C, with a 3-pole frame and a breaking capacity of 121 kA at 415 V AC. The basic switch core is order code 3VA2450-5MN32-0AA0.
This MCCB's interrupting rating drops as line voltage rises — a standard characteristic for any molded case breaker. At 240 V it handles 187 kA; at 415 V and 440 V it holds 121 kA; at 500 V it's 75.6 kA; at 690 V it's 9 kA. For a 480 V panel (common in North America), the 75.6 kA at 500 V is the relevant figure — that's well above typical 480 V available fault currents in most distribution boards.
Above that, it derates: 495 A at 55 °C, 490 A at 60 °C, 485 A at 65 °C, and 480 A at 70 °C (–).