The Schneider Electric A9F79640 is an Acti9 iC60 miniature circuit-breaker (MCB) rated at 40 A, C curve, in a 1P+N configuration. It protects branch circuits against overloads and short-circuits in AC distribution panels, using a thermal-magnetic trip unit. The C curve (magnetic tripping limit 8 x In +/- 20%) means it handles moderate inrush currents typical of lighting and small motor loads without nuisance tripping.
The breaking capacity reaches 36 kA Icu at 12-60 V AC, 20 kA at 100-133 V, and 10 kA at 220-240 V per IEC 60947-2, plus 6000 A Icn at 230 V per IEC 60898-1.
Snaps onto a DIN rail (mounting support: DIN rail). Height 85 mm, depth 78.5 mm. Terminals accept 1-35 mm² rigid or 1-25 mm² flexible copper; tightening torque 3.5 N.m. Wire strip length 14 mm. IP20 finger-safe terminals. Earth-leakage protection requires a separate block (Vigi iC60 or similar) added to the right side.
