The Square D B5.50 Thermal Overload Unit is a heater element motor protection device designed to provide thermal and overload protection. manufactured in the United States, this unit from Square D is a reliable solution for safeguarding electrical equipment and machinery. With its thermal overload relay feature, this unit helps to prevent overheating and ensures that motor operations are safe and efficient. Perfect for industrial applications, the Square D B5.50 Thermal Overload Unit offers a high level of protection for your motor systems.