It is a 3-pole device (3P) with a breaking capacity code of N — 50 kA Icu at 415 V AC per IEC 60947-2. This is the part you spec into a distribution board or motor control center when you need 160 A of overload and short-circuit protection on a 400 V class system and the fault current at the bus can hit 50 kA.
Below that, the 36 kA at 500 V and 10 kA at 690 V tell you how the arc extinction scales with voltage; at higher voltages the same mechanism has to work harder. The TM-D trip unit gives you thermal-magnetic protection: the thermal element handles overloads (L protection) with a time curve, and the magnetic element handles instantaneous short-circuit trips (I protection). No earth-leakage module is built in, so if you need ground-fault protection you add a Vigi module externally.
Front connections top and bottom. The 105 mm width per 3-pole unit is standard for the NSX frame; it fits alongside other NSX devices on a common busbar system. IP40 front face keeps tools and fingers out; IK07 impact resistance handles incidental knocks in a panel.