At 3 A rated, it protects a circuit drawing up to 3 A continuous; the 70 kA Icu at 240 V AC tells you it can safely interrupt a fault current up to 70 kA without failing, which is essential for high-fault-capacity panels (e.g., near a large transformer or in an industrial distribution board). It is certified to both EN/IEC 60898-1 (household/industrial MCB standard) and EN/IEC 60947-2 (industrial circuit-breaker standard), so it qualifies for commercial and light industrial distribution panels — not just residential load centers. The 500 V AC rated insulation voltage (Ui) and overvoltage category IV mean it's rated for main incoming supply positions, not just downstream sub-circuits.
Deployment context
The toggle handle provides local on/off control and a trip-indicator flag for quick fault identification on the panel door.