The Siemens 3VA2510-5HL32-0HC0 is a SENTRON molded case circuit breaker sized for 1000 A continuous current across three poles, with an interrupting capacity of 187 kA at 240 V and 121 kA at 415 V — enough to clear high-fault industrial feeders without cascading upstream. It carries the ETU320 electronic trip unit, adjustable from 400 A to 1000 A for the long-time pickup (Ir) and 1500 A to 10 000 A for instantaneous (Ii), so you can tune it to the cable and load without swapping the breaker.
Full 1000 A rating holds through 55 °C ambient; at 60 °C it derates to 955 A, at 65 °C to 885 A, and at 70 °C to 815 A. Plan your enclosure cooling if the breaker sits near other heat sources in a sealed cabinet. Verify the gland-plate cutout and bus-bar spacing before panel layout.