The Schneider Electric C16B32D100 is a ComPacT NSX160B molded-case circuit breaker, 3-pole, rated 100 A at 40 °C with a MicroLogic 2.2 electronic trip unit. It's designed for distribution applications per EN/IEC 60947-2, with a breaking capacity of 25 kA Icu at 380/415 V AC 50/60 Hz.
The 100 A frame with a 25 kA Icu at 415 V AC means this breaker can safely interrupt a fault up to 25 kA at common European 400 V-class line voltages. For a panel fed from a 1000 kVA transformer, that's enough to clear a bolted fault without upstream coordination issues. Mechanical durability is rated at 40,000 cycles, electrical durability at 40,000 cycles at 440 V In/2 and 20,000 cycles at 440 V In. That's a solid service life for a panelboard feeder breaker — expect to swap it on a 15-year maintenance cycle, not every few years.
The 105 mm width, 161 mm height, and 86 mm depth fit standard ComPacT NSX panel cutouts. IK07 impact rating handles accidental tool drops during maintenance.