The thermal-magnetic trip unit is fixed: overload protection (Ir) is set at 160 A, and short-circuit protection (Ii) is fixed at 10× In, or 1600 A. That fixed 10× multiplier means the magnetic trip responds to instantaneous currents above 1600 A; for applications needing a lower pickup (like motor starting inrush), a different trip unit or frame would be needed.
Integration and accessory note
The breaker includes a factory-fitted shunt trip on the left side, rated for 208–277 V AC (50/60 Hz) and 220–250 V DC. That shunt allows remote tripping from an emergency-stop circuit or a PLC output. The nut keeper kit on the terminals simplifies panel wiring — the nut stays captive during bus-bar installation.