The A9K24604 is a Schneider Electric Acti9 iK60N miniature circuit-breaker rated 4 A at 30 °C with a C-curve (magnetic trip 5...10 x In), meaning it's sized for general-purpose branch circuits where moderate inrush — from small motors, transformers, or lighting ballasts — is expected. The 1P+N configuration (one protected pole plus switched neutral) suits single-phase final subcircuits where the neutral is switched with the phase, common in UK/EU split-load boards. The thermal-magnetic trip unit provides overload protection via the bimetal and short-circuit protection via the solenoid, with the C-curve's 5-10x In window balancing nuisance-tripping against fault clearance. Clip-on mounting to DIN rail (35 mm per EN 60715) and a width of 36 mm (4 x 9 mm pitches) means it occupies one standard module slot in a distribution board — critical for panel fill-factor planning. The IP20 finger-safe terminals (tunnel type, accepting 1...25 mm² rigid or 1...16 mm² flexible) are rated for enclosure-only use; no washdown or outdoor exposure. The white colour and ON/OFF toggle indication are standard for Acti9 residential ranges.
Limitation class 3 per that standard means it limits let-through energy effectively for downstream equipment protection. The suitability-for-isolation marking (yes, conforming to EN/IEC 60898-1) means it can be used as a disconnecting means for the circuit. No earth-leakage protection is integrated — that's handled by a separate RCD upstream.