Novel solid-state relay circuit

The utility model provides a novel solid-state relay circuit. Grid electrodes of a first MOS tube and a second MOS tube are connected with one end of an optical transistor of an optical coupler. The other end of the opto-transistor is connected with the power supply circuit; a light emitting diode of the optical coupler is connected with a control signal input end; the drain electrode of the first MOS tube and the drain electrode of the second MOS tube are respectively connected with the first port and the second port; the source electrode of the first MOS tube is connected with one end of the first resistor and the source electrode of the second MOS tube. The other end of the first resistor is connected with the drain electrode of the first MOS tube. According to the utility model, a control signal is transmitted through the optocoupler, the switch of the MOS tube is controlled to realize the function of the relay, the selection of the MOS tube is very flexible, and the proper MOS tube can be selected accord