The Schneider Electric A9K23620 is an Acti9 iK60N miniature circuit breaker — a 20 A, 1P+N unit with a B tripping curve. The 6 kA breaking capacity at 230 V AC (EN/IEC 60898-1) covers most branch-circuit fault levels in those settings; the B curve (magnetic trip at 3–5 × In) suits resistive or general-purpose loads where inrush is low.
Above that, the thermal-magnetic element responds: the thermal bimetal handles overloads (slow, inverse-time), and the magnetic coil clears short-circuits at 3–5 × In (60–100 A). That B curve is standard for lighting and socket-outlet circuits where starting surges are modest — not for motor or transformer loads that would nuisance-trip on a B curve. The 1P+N configuration switches the phase and breaks the neutral (neutral is switched but not protected against overload). The neutral position is left, which matters when replacing a unit in a multi-pole assembly — the busbar alignment must match.
The A9K23620 is listed as current-production (active lifecycle). It is a standard catalog item in the Acti9 range, widely specified across European and Middle Eastern distribution boards. No last-time-buy or end-of-life notice is in effect for this order code.