Rating and fit for the panel
The Siemens SENTRON 3VA2580-5HN32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for 800 A continuous current across the 40 °C to 60 °C ambient range — no derating needed until 65 °C, where it steps to 767 A, and 703 A at 70 °C. That flat thermal curve simplifies panel sizing: the breaker delivers its nameplate 800 A in most standard enclosure conditions without recalculating. Interrupting ratings hit 187 kA at 240 V, 121 kA at 415 V, and 53 kA at 690 V — figures that cover high-fault infrastructure like transformer secondaries or large motor control centers. The ETU350 electronic release allows adjustable long-time pickup (Ir) up to 800 A and instantaneous pickup (Ii) up to 8 000 A, plus short-time delay (tsd) from 0.04 s to 0.4 s. Mounts in a standard panel footprint: 210 mm wide, 320 mm tall, 120 mm deep. No communication module or ground-fault monitoring is built in — this is a straight line-protection device.