The Siemens SENTRON 3VA2510-5HL42-0KF0 is a 4-pole molded case circuit breaker rated for 1000 A continuous current at 40 °C through 55 °C, with a slight derating curve starting at 60 °C (955 A) down to 815 A at 70 °C. That flat thermal plateau up to 55 °C gives you headroom in a warm enclosure without oversizing the frame. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V, and 53 kA at 690 V — figures that place it in the high-interrupting range for industrial distribution where fault currents can exceed 100 kA. The ETU320 electronic trip unit gives you adjustable long-time pickup (Ir) from 400 A to 1000 A and instantaneous pickup (Ii) from 1500 A to 10000 A, plus adjustable N-conductor protection (OFF, 50%, 100%).
Dimensions are 280 mm wide, 320 mm high, 120 mm deep.