Thermal overload protection relay designed for motor overload protection. Detects temperature rise inside motors and automatically cuts power when set values are exceeded to protect motors from burnout. Essential protection device for manufacturing equipment drive motors including three-phase induction motors, servo motors, and stepping motors, used in combination with electromagnetic contactors and magnetic switches. Features adjustable dial for current value setting with manual reset and automatic reset types available. Suitable for installation in distribution panels and standalone use in control panels, widely adopted in manufacturing equipment such as NC machine tools, CNC systems, and automated production lines.