The Schneider Electric A9F68301 is a 3-pole miniature circuit breaker from the Acti9 iT60 series, rated at 1 A with a C trip curve.
This breaker delivers 50 kA Icu at 415 V AC (per EN/IEC 60947-2), which means it can safely interrupt a fault current up to 50,000 A without welding its contacts or rupturing the case. At 440 V AC the rating drops to 25 kA Icu, and at 400 V AC the Icn per EN/IEC 60898-1 is 10 kA — still adequate for most sub-distribution boards.
Trip curve and selectivity
The C curve means the magnetic trip threshold is 8 x In (±20 %), so for this 1 A breaker the instantaneous trip point sits between 6.4 A and 9.6 A. That suits loads with moderate inrush — think control transformers, contactor coils, or small lighting circuits — while still providing enough headroom to avoid nuisance tripping on startup. The thermal-magnetic trip unit handles the overload side; the thermal element responds to sustained overcurrents, the magnetic element to short-circuits.
Standards and isolation suitability
It is marked suitable for isolation per both standards, meaning you can rely on the visible contact position indicator to confirm the circuit is dead before working downstream.