P&H Harnischfeger 479Q40D1 Thermal Overload Relay 600VAC

Heavy‑duty thermal overload relay manufactured by P&H Harnischfeger, designed to provide reliable motor overload protection in industrial control applications, featuring adjustable current settings and manual or automatic reset capability. Technical specifications Manufacturer: P&H Harnischfeger Manufacturer part number: 479Q40D1 Product type: Thermal overload relay Protection function: Motor overload protection Number of poles: 3 Rated operational voltage: Up to 600 VAC maximum Rated frequency: 50/60 Hz Current adjustment range: 33–40 A Trip class: Class 10 Reset type: Manual / automatic selectable Reset method: Pushbutton reset Contact configuration: Auxiliary trip contacts (series standard) Mounting type: Panel mount / contactor‑mounted (application dependent) Terminal type: Screw clamp terminals Conductor material compatibility: Copper conductors Housing material: Industrial‑grade molded thermoplastic Base material: Metal mounting base Overload detection method: Bi‑metal thermal elements Phase failure sensitivity: Yes Ambient temperature compensation: Built‑in Mechanical durability: Industrial duty rated Electrical durability: Industrial control duty Typical applications: Motor starters, industrial machinery, pumps, conveyors Standards compliance: NEMA / UL industrial control standards Condition: Complete assembled overload relay Country of manufacture: United States