For a 16 A feeder in a commercial or light industrial panel, that gives you enough headroom to coordinate with a 25 kA upstream device.
The C curve means magnetic trip occurs at 8 x In ±20 % — so the breaker holds through motor inrush and capacitor charging currents that would nuisance-trip a B curve, but still clears fast on a hard short. For a 16 A circuit, that's a magnetic threshold around 128 A to 154 A. Thermal-magnetic trip unit gives you the standard bimetal overload protection plus the solenoid for short-circuit. No electronic adjustment — set it and forget it, which is exactly what you want in a distribution board where the load is fixed. That's a real differentiator if your site has variable power quality.
Mounts via clip-on to 35 mm DIN rail. Takes 8 x 9 mm pitches. Width 72 mm, height 85 mm, depth 77.5 mm. Wire strip length is 13 mm. Tightening torque 2 N·m — a standard screwdriver setting, no special tooling. Keep it inside the panel. Earth-leakage protection is handled by a separate block, so this is the MCB only; pair it with an RCCB if you need residual current protection.