What is a solid state relay？
1. Solid-state relay is a new type of non-contact switching device composed of solid-state electronic components. It uses the switching characteristics of electronic components (such as switching triodes, triacs and other semiconductor devices) to achieve non-contact and non-sparking. The purpose of making and breaking the circuit, so it is also called "contactless switch". Solid state relay is a four-terminal active device, two terminals are input control terminals, and the other two terminals are output controlled terminals. It has both amplifying and driving functions and isolation functions, which is very suitable for driving high-power switching actuators , Compared with electromagnetic relays, it has higher stability, and has no contacts, long life, fast speed, and little interference to the outside world, and has been widely used.
2. Solid state relays can be divided into two categories: AC type and DC type according to the application. They are respectively used as load switches on AC or DC power sources and cannot be mixed.
3. The dedicated solid state relay can have short circuit protection, overload protection and overheat protection functions, and the combination logic curing package can realize the intelligent module required by the user, which can be directly used in the control system.
4. The solid state relay is a non-contact electronic switch with isolation function. There are no mechanical contact parts during the switching process. Therefore, in addition to the same function as the electromagnetic relay, the solid state relay also has logic circuit compatibility, vibration resistance and mechanical shock resistance. The installation location Unlimited, with good moisture-proof, mildew-proof and anti-corrosion performance, good 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.
