This appears to be a thermal relay from Mitsubishi Electric, likely the "TH-N Series." This is a protective relay primarily used for overload and locked rotor protection of motors. Applications: Applicable for overload and locked rotor protection of motors. Current Value Setting: The motor's current value can be set directly and adjusted with a plus/minus screwdriver. Reset Method: Easily switch between manual and automatic reset. Please examine the photo carefully to confirm. Management Number: D-12