The Schneider Electric C10F44B100 is a ComPacT NSX100F molded-case circuit breaker, 4-pole, rated 100 A at 40 °C with an electronic MicroLogic 4.2 AB trip unit. The 4.2 AB trip gives you L (long-time overload), So (short-time short-circuit with fixed delay), I (instantaneous short-circuit), and R (earth-leakage) protection all in one device, so you cover both overcurrent and ground-fault from a single breaker. This is a Category A breaker (no intentional short-time delay for selectivity with downstream devices), so it's suited for feeder duty where you need fast clearing rather than cascaded coordination.
The C10F44B100 delivers 85 kA Icu at 240 V AC, 36 kA at 415 V, 35 kA at 440 V, and 22 kA at 525 V AC. At 480 V it is rated 25 kA Icu per UL 60947-4-1.
Front-connect both top and bottom, which keeps wiring accessible in a panel. The 4-pole format with neutral on the left is standard for European distribution.