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JR36-63 series thermal overload relay is a classic low-voltage protection component matched with AC contactors for three-phase motor control cabinets. The adjustable current knob allows precise setting according to motor rated current. When long-term overload or phase loss happens, internal bimetallic sheets deform to trigger the auxiliary contact and cut off the control loop, realizing reliable motor protection. The integrated 1NO+1NC contact supports linkage with indicator lights, buzzers and control circuits, suitable for machine tools, water pumps, fans and other industrial motor equipment.