What this SENTRON MCCB carries
It's a line-protection design with communication function, so it can talk to a BMS or PLC for remote monitoring and trip indication — no separate aux contact needed for basic status. Breaking capacity is 330 kA at 240 V AC, dropping to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V.
That's unusual; most MCCBs start stepping down above 40 °C. The ETU850 release is adjustable between 38 A and 300 A (the minimum and maximum settings), so this breaker can be dialed to protect a feeder or a downstream panel, not just a fixed load. Power loss is 0.5 W maximum — negligible for thermal budget inside a packed panel.
Mounting and footprint
That's a 4-pole frame in the 3VA2 compact footprint — fits standard panel-mount cutouts for this class. No DIN-rail clip; it bolts to a mounting plate.