The MicroLogic 5.3 E electronic trip unit provides L, S, and I protection curves plus energy metering — so you get both overcurrent coordination and power-quality data from one device.
The 100 kA Icu at 690 V AC (also rated 100 kA at 500 V and 525 V) means this breaker can safely interrupt a fault up to that level without welding contacts or cascading upstream. That HB2 breaking-capacity code tells you it's sized for high-fault installations — think industrial substations or large motor-control centers, not light commercial panels.
Mounts to a backplate — no DIN-rail adapter here. The 255 mm height, 185 mm width, and 110 mm depth fit standard switchboard cubicle cutouts. The toggle control and LCD display give local status and metering readout without opening the door. Six accessory slots accept shunt trips, auxiliary contacts, or communication modules for remote monitoring.