Key Parameters Category Description / Value Product Line Eaton NZM4 Model / Frame Size NZM4-XKS Release Type Fixed Thermal-Magnetic (Standard "A" Release) • Non-adjustable overload and short-circuit protection. Rated Current (Iₙ) 125 A (This is a fixed value for this specific variant, e.g., NZM4-XKSA 125). Poles 3-Pole & 4-Pole versions are commonly available. Rated Operational Voltage (Uₑ) 690 V AC, 50/60 Hz Rated Insulation Voltage (Uᵢ) 1000 V Rated Ultimate Short-Circuit Breaking Capacity (Iᶜᵘ) Up to 100 kA at 400V AC (IEC 60947-2). The exact value depends on the specific voltage and model certification. Release Characteristics Thermal (Long Delay): For overload protection. Magnetic (Short Delay/Instantaneous): For short-circuit protection. Both are factory-set and non-adjustable. Standards Compliance IEC/EN 60947-2 Connection Standard screw terminals. Mounting Fixed Mounting (for bolted direct installation in panels). Auxiliary Contacts & Accessories Compatible with the full range of NZM4 accessories, which can be easily snapped on, such as: • Auxiliary Contacts (OF, SD) • Undervoltage Release (UV) • Shunt Trip (ST) • Rotary Handle Operator (for door mounting) • Padlockable Handle Locks