It provides thermal-magnetic LI protection — L (thermal overload) with an adjustable long-time pick-up from 0.7 to 1 x In, and I (magnetic short-circuit) fixed at 520 A. Built for generator protection on AC networks up to 690 V, 50/60 Hz, it meets EN/IEC 60947-2. That standard covers the breaking performance and coordination requirements for low-voltage switchgear, so you know it's tested for real fault clearing, not just a label.
Three poles, three protected poles (3P 3D). That means it switches and protects all three phases — no shared neutral pole. IP40 front face keeps fingers and tools out but isn't washdown-rated; mount it inside a cabinet.