How to Wire Solid State Relay?

Solid state relay has reliable operation, long life, no noise, no spark, no electromagnetic interference, fast switching speed, strong anti-interference ability, and small size, impact resistance, oscillation resistance, explosion-proof, moisture-proof, anti-corrosion, compatible with TTL, DTL, HTL and other logic circuits, with small control signals to directly drive large current load.

Solid state relay has been widely used in computer peripheral interface device, electric furnace heating constant temperature system, CNC machinery, remote control system, industrial automation device, signal lamp, scintillator, lighting stage lighting control system, instruments and meters, medical equipment, copier, automatic washing machine, automatic fire control, security system, As well as power grid power factor compensation power capacitor switch and so on, in addition in chemical, coal and other need explosion-proof, moisture-proof, anti-corrosion occasions are widely used.

Solid state relay use example

This is a 40A solid state relay with 3~32V DC control voltage and 24~480V AC Load voltage.

The protective cover is removed to reveal four terminals. 3 and 4 are control terminals, 1 and 2 are output terminals, and a red indicator light.

After wiring is completed, press the button to connect the solid state relay, the indicator light is on, and the solid state relay runs normally.

If the switching current of relay exceeds 10A, relay heating will increase. Therefore, heat conduction grease can be coated on the back of the solid state relay, and then heat dissipation can be added. You can watch the video below to learn more about solid state relay wiring.