The Schneider Electric A9K23601 is a 1P+N miniature circuit-breaker from the Acti9 iK60 series, rated 1 A at 30 °C with a B-curve (magnetic trip between 3 and 5 x In).
The 1 A rating and B-curve mean it trips fast on moderate overloads (3–5 x In), so it suits resistive loads like lighting strings or control transformers where inrush is low. Thermal-magnetic trip technology handles both sustained overload (thermal bimetal) and short-circuit (solenoid). It is also certified for isolation (EN/IEC 60898-1), meaning you can safely isolate the downstream circuit with the toggle in the OFF position. The 1P+N configuration switches the phase and switches the neutral (neutral left). Only the phase is protected — the neutral is switched but not monitored for overcurrent.
IP20 finger-safe protection on the front; the terminals are protected when wired.