Thermal Overload Relays protect motors using bimetallic or electronic thermal sensing. Core features include adjustable Class 10/20/30 tripping, ambient temperature compensation, and manual/auto reset. They offer precise current monitoring, phase failure detection, and IEC 60947-4-1 compliance. Key specs: 0.1-32A current ratings, 24-690V voltage support, IP20 protection, and -20℃ to +60℃ operating range. Innovations like digital displays and communication modules improve protection for pumps, compressors, and conveyors, ensuring reliable thermal sensing and customizable tripping for motors in demanding environments.