Introduction

Solid-state relays are non-contact electronic switches with isolation function. There are no mechanical contact parts during the switching process. Therefore, in addition to the same functions as electromagnetic relays, solid-state relays are also compatible with logic circuits, resistant to vibration and mechanical shock, and have unlimited installation positions. , has good moisture-proof, mildew-proof and anti-corrosion performance, excellent performance in explosion-proof and ozone pollution prevention, low input power, high sensitivity, low control power, good electromagnetic compatibility, low noise and high operating frequency. The solid state relay dedicated to the solid state relay can have the functions of short circuit protection, overload protection and overheat protection, and the combination logic curing package can realize the intelligent module required by the user, which can be directly used in the control system. Solid state relays have been widely used in computer peripheral interface equipment, constant temperature systems, temperature regulation, electric furnace heating control, motor control, numerical control machinery, remote control systems, industrial automation devices: signal lights, dimming, flashers, lighting stage lighting control systems; Instruments and meters, medical equipment, copiers, automatic washing machines; automatic fire protection, security systems, and power capacitor switches used as power factor compensation for power grids, etc. In addition, there are a large number of explosion-proof, moisture-proof, and anti-corrosion occasions in chemical industry, coal mines, etc. use.