The Schneider C10N34V100 is a ComPacT NSX earth leakage circuit breaker, 3-pole, rated 100 A at 40 °C with a MicroLogic 4.2 electronic trip unit. The 90 kA Icu at 240 V AC is the same breaker on a lower-voltage service; the 10 kA at 690 V AC is the ceiling for a 690 V line. What governs the real-world fit is the 100 A trip unit rating and the integrated earth-leakage protection (the R in the protection type set: L for overload, So for short-time short-circuit with fixed delay, I for instantaneous short-circuit, R for earth-leakage). The electronic trip gives you adjustable long-time pickup and delay, plus the earth-leakage function built in — no add-on module needed.
Mounts to a backplate — not a DIN rail. The 105 mm width (3-pole frame) and 161 mm height fit standard ComPacT NSX cutouts; the 86 mm depth leaves room for front-connected cables (upside and downside connections are both front-facing). The IP40 front face keeps dust out; the IK07 impact rating handles accidental tool drops during commissioning. The 35 mm connection pitch is the standard busbar or cable-lug spacing for this frame size.
What the durability numbers mean for a distribution feeder
Mechanical durability is 50,000 cycles — that is the handle life, not the electrical contact life. Electrical durability varies by load: 50,000 cycles at 440 V at half rated current (In/2), 30,000 cycles at 440 V at full rated current (In), 20,000 cycles at 690 V at In/2, and 10,000 cycles at 690 V at In. For a distribution feeder that sees infrequent switching (a few operations a year), these numbers are academic — the breaker will outlast the panel. But if this breaker is used as a disconnect that cycles weekly, the 30,000-cycle figure at 440 V In is the one to watch.