The Schneider Electric A9K24740 is a miniature circuit-breaker from the Acti9 iK60N series, rated 40 A with a C-curve magnetic trip characteristic (5...10 x In) and 3P+N poles.
Rated insulation voltage is 440 V AC, and overvoltage category III applies — this breaker is designed for fixed installation inside a distribution panel, not for outdoor or portable use. IP20 protection means it is touch-safe but not washdown-rated. Thermal-magnetic trip technology gives you both thermal overload protection (bimetal strip) and magnetic short-circuit protection (solenoid). No earth-leakage protection built in — that would require a separate RCCB or RCBO upstream.
Width is 72 mm (8 x 9 mm pitches), depth 78.5 mm, height 85 mm. Tunnel-type terminals accept 1 to 35 mm² rigid or 1 to 25 mm² flexible cable; tighten to 3.5 N·m. Wire strip length 14 mm.
