What is contact rating?

Contact rating refers to the maximum electrical load that a switch or relay can handle without risk of damage or failure. It is typically expressed in terms of voltage and current, indicating the safe operating limits for the device. Exceeding these ratings can lead to overheating, arcing, or premature wear, ultimately compromising the reliability and safety of the electrical system. Manufacturers provide these ratings to ensure proper application and to guide users in selecting appropriate components for their specific needs.