A relay is a switch controlled by an electrical circuit in which, by means of a coil and an electromagnet or a semiconductor electronic circuit, a set of one or more contacts is activated that allow the opening or closing of other contacts. independent electrical circuits. Frequently the load connected to the output consumes more than the control that excites it or else we want to electrically isolate both parts and it is for this reason that we need these devices called relays. In this way we will have two fundamental types of relays:
Special mention have the bistable relays that are relays that when applying voltage to the coil the voltage makes the relay work, but when the voltage is removed, it does not return it to the original position. We could say that they have interlocking. Frequently, those of this type usually have two coils.
In this section you will find the following sections:
Miniature relays : they are electromechanical relays for low signal, generally used in telecommunications and / or switching of small loads
Conventional Relays : in this section we have electromechanical relays of general application located with up to about 16A of switching capacity
High Power Relays : They are electromechanical relays too. Above 30A, such as relays with faston terminals that are commonly used in the automotive industry
Relay Bases and Accessories : when we want to install a relay in an electrical panel, we resort to relay sockets for din rail. These and other accessory devices for relays is what you will find in this section
Telephone Relays : It is a particular type of relay that is excited with the voltage of the telephone call. They also have connection terminals.
Relays and Reed Ampoules : it is an electrical switch activated by a magnetic field. When the contacts are normally open they close in the presence of a magnetic field; when they are normally closed they open in the presence of a magnetic field. There are also switched.
Solid State Relays : already mentioned above.
Timed Relays : it is common to have to make timings, in such a way that there are cyclical ones, delay to the connection, that deliver a pulse, etc. Even multifunction in which we can configure the specific function of the timer and the time. example a lamppost.