The Siemens SENTRON 3VA2580-5JP32-0BA0 is a 3-pole molded case circuit breaker rated for 800 A continuous current (Iu) at 40 °C through 60 °C, derating to 767 A at 65 °C and 703 A at 70 °C. Its interrupting capacity is the headline figure: 187 kA at 240 V, 121 kA at 415 V, and 53 kA at 690 V — these are the fault currents it can safely clear without welding contacts or rupturing the case. For a 415 V distribution board, that 121 kA SCCR means it sits comfortably downstream of a transformer with high fault potential; you do not need a current-limiting fuse upstream to protect the breaker itself. The ETU550 electronic trip unit gives adjustable long-time pickup (Ir) up to 800 A, long-time delay (tr) from 0.5 to 25 seconds, and short-time delay (tsd) from 0.05 to 0.5 seconds. That lets you coordinate selectively with downstream breakers — set the short-time delay long enough that a branch fault clears before this main breaker sees it. The 10 000-cycle latching endurance covers routine switching of the load side for isolation, not daily motor starting.
The breaker measures 210 mm wide, 320 mm high, and 120 mm deep — a standard SENTRON 3VA frame size for the 800 A class. It mounts with four screws to a backplate or mounting bracket; no DIN-rail clip on this frame.