1. What is a relay?

In fact, the relay is a kind of input quantity. When a certain input quantity such as electricity, magnetism, sound, light or heat reaches a specific value, its output will change by leaps and bounds.

Relays have control systems (also known as input circuits) and controlled systems (also known as output circuits). It is an automatic switch, which can work with a small current under a large current. Therefore, it is mainly used for safety protection, automatic regulation and switching circuits in circuits.

2. What is the working principle of the relay?

When the input value of the relay reaches a certain value, the "switch" in the relay will change, making the controlled output circuit on or off. The principle of different types of relays will be slightly different, but in general, the effect is the same.

3. What is the use of relays?

According to the industry, relays can usually be divided into communication relays, automotive relays, household appliance relays and machine tool relays.