CT7N Bi-Metallic Thermal Overloadsv ensure reliable protection with differential tripping, factory calibration & ambient temperature compensation. CT7N overload relays include many standard features not available with traditional overload protection devices and are designed to mount directly to the load side of Sprecher + Schuh CA7 Contactors. CT7N thermal overloads are the best choice for variable speed drive or DC current monitoring applications. Comes standard with automatic/manual reset modes, and isolated alarm circuit contacts.