The C106MA100 is a magnetic-only trip unit from the ComPacT NSX100...250 range, designed for motor short-circuit protection (protection type I) in AC networks. It carries a 100 A rating at 65 °C, so it's sized for a motor full-load current up to that thermal limit — the magnetic element handles fault clearing, not overload. The instantaneous pick-up is adjustable from 6 to 14 times In (600 A to 1400 A), which lets you set the magnetic threshold above the motor's starting inrush without nuisance tripping. This is a 4-pole unit with 3 protected poles (3D) — the neutral pole is unprotected, so it's intended for three-phase motor circuits where the neutral carries no load.
Fixed-mount trip unit for ComPacT NSX100, NSX160, or NSX250 molded-case circuit breakers. The neutral position is left, and the unit snaps into the breaker's trip-unit cradle — no wiring required beyond the breaker's own terminals. IP40 protection (IEC 60529) covers the trip unit itself; the overall breaker enclosure may carry a higher rating. Ambient operating range is -25 to 70 °C, storage from -50 to 85 °C — fine for most indoor panel installations, though you'll want to check the breaker's own derating curve if the panel ambient exceeds 40 °C.