The Schneider Electric C11E34V025B is a ComPacT NSXm earth leakage circuit breaker with a MicroLogic 4.1 electronic trip unit. It's rated 25 A at 40 °C, three-pole, and carries a 16 kA breaking capacity at 415 V AC — that's the fault level it can safely clear without welding contacts or venting gas into the panel.
The 25 A rating at 40 °C is the continuous current the breaker handles in a 40 °C ambient — push it into a warmer enclosure and you'll need to derate per the thermal curve. The electronic trip unit (MicroLogic 4.1) gives you adjustable overload and short-circuit protection curves, plus integrated earth-leakage protection with selectable sensitivity from 30 mA to 5 A, Class A or AC. That means one device covers both overcurrent and ground-fault protection — saves a slot in the panel. That means it's rated for motor-starting duty and higher fault levels than a typical DIN-rail MCB.
It's 9 module pitches wide (108 mm), 144 mm tall, 80 mm deep. Front connections top and bottom accept compression lugs or busbars. The 35 mm connection pitch with spreaders (27 mm without) matches standard busbar systems.