This industrial control code is a must-have for anyone in need of reliable overload protection. Made by Arrow Hart, this electronic overload relay is designed to ensure the safety of your electrical equipment and supplies. With a model number of 34220-501, this relay is perfect for those in need of overload protection in their business or industrial setting. The COOPER/ARROW HART 34220-501 INDUSTRIAL CONTROL CODE 20 110-120V 50/60HZ D54 is an essential component for those looking to protect their electrical equipment and supplies from overload. This relay is perfect for use in a variety of settings, including industrial and commercial settings. It is also important to note that this relay is designed to work with a wide range of electrical equipment and supplies, making it a versatile option for anyone in need of reliable overload protection.