A solid state relay (SSR) is a non-contact semiconductor control component where the input side and output side are isolated like an electromagnetic relay (EMR), and a function which matches the ON/OFF of the input and output is provided for switching electric circuits ON/OFF using semiconductor devices.
SSRs are not only used in industrial machinery, such as machining centers and industrial robots, but are also widely used in the following fields which support electric appliances and our daily lives.
Office equipment, such as copy machines, phototypesetting machines, facsimile, telephone switchboards, and computer terminals.
Equipment, such as NC machine tools, elevators, industrial robots, electric lighting, sequencers (PLCs), and temperature controllers.
Electric appliances, such as microwave ovens, power tools, sewing machines, air conditioners, washing machines, and refrigerators.
Lighting equipment, such as signals, lighting display boards and dimmers.