The Schneider Electric C63F34V570 is a ComPacT NSX earth leakage circuit breaker rated at 570 A at 40 °C, with a MicroLogic 4.3 electronic trip unit that combines overload (L), short-time (So), instantaneous (I), and integrated earth-leakage (R) protection in one package. It's a 3-pole unit built for distribution duty, not motor starting — Category A utilization, so it's meant for cable and busbar protection, not switching loads under heavy inrush. The 40 kA Icu at 240 V AC (36 kA at 415 V, 30 kA at 440 V) gives you real fault-current headroom in a panel fed from a transformer or a genset — enough to coordinate downstream without blowing the main. The electronic trip has a 20-minute thermal memory, so after a trip it remembers the heat buildup and won't let you re-close into a still-hot cable.
This breaker bolts to a backplate — no DIN-rail clip. Mount it flat on the back, horizontal or vertical, with front connections on both the line and load sides. At 255 mm tall, 140 mm wide, 110 mm deep, it's a compact frame for 570 A — the NSX630F footprint fits in a standard 600 mm wide switchboard section without crowding the cable ducts.