Product Overview and Key Ratings
The Schneider Electric A9F43270 is a 0.5 A, B-curve, 2-pole miniature circuit breaker from the Acti9 iC60N family, designed for clip-on mounting on a DIN rail. Its B-curve characteristic (magnetic tripping at 4 x In ±20%) means it is suited for resistive or lighting loads where inrush currents are low, providing fast short-circuit protection without nuisance tripping on moderate start-up surges. The breaking capacity is 50 kA Icu at 220...240 V AC and 380...415 V AC per EN/IEC 60947-2, and 10 kA Icn at 415 V AC per EN/IEC 60898-1. Rated operational voltage covers 12...133 V AC, 220...240 V AC, 380...415 V AC, and 440 V AC at 50/60 Hz, plus ≤125 V DC, making it usable across single-phase and three-phase networks as well as DC control circuits.
Clip-on mounting on a standard DIN rail (35 mm per EN 60715) occupies 4 x 9 mm pitches (36 mm width), fitting a standard modular enclosure slot. The IP20 finger-safe terminals accept 1...25 mm² rigid or 1...16 mm² flexible conductors; tightening torque is 2 N.m. The white housing with toggle and trip indicator provides local visual status.
