Solid state relays are typically comprised of an opto-isolator input, which activates a solid state switching device such as a triac, SCR, or FET.

• 固态继电器通常包括一个光隔离输入，该输入激励一个固态开关器件，例如双向晶闸管、SCR（可控硅）或FET（场效应管）。