The Siemens SENTRON 3VA2580-5HL32-0AE0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 800 A at ambient temperatures up to 60 °C — the current rating holds flat at 800 A from 40 °C through 60 °C, then derates to 767 A at 65 °C and 703 A at 70 °C. That flat thermal curve means the breaker delivers its full 800 A rating across a wider-than-usual temperature band, so in a warm panel (say 55 °C) you still get the full nameplate current without having to oversize the frame. The breaking capacity is 187 kA at 240 V, 121 kA at 415 V, and 53 kA at 690 V — these are the maximum fault currents the breaker can safely interrupt at each voltage level, which determines whether it coordinates with upstream gear in an SCCR study. The ETU320 electronic trip unit allows adjustment of the long-time pickup (Ir) from 320 A to 800 A, short-time pickup (Ii) from 1 200 A to 8 000 A, and long-time delay (tr) from 0.5 s to 17 s, giving selectivity tuning for feeder and main applications.
Deployment context
This MCCB is sized for main or large-feeder protection in switchboards and panelboards — the 210 mm width and 320 mm height fit standard Siemens SENTRON mounting patterns, and the IP40 front protection (per) means it is suitable for installation inside a closed electrical enclosure where the front face is accessible but not exposed to washdown or outdoor rain.