{"id":20287,"date":"2026-04-21T21:37:22","date_gmt":"2026-04-21T13:37:22","guid":{"rendered":"https:\/\/lorentzzi.com\/?p=20287"},"modified":"2026-04-22T09:04:12","modified_gmt":"2026-04-22T01:04:12","slug":"relay-types-8-kinds-you-need-to-know","status":"publish","type":"post","link":"https:\/\/lorentzzi.com\/fr\/relay-types-8-kinds-you-need-to-know\/","title":{"rendered":"Relay Types: 8 Kinds You Need to Know"},"content":{"rendered":"
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We live in a world full of switches, even the computers and mobile phones we use are, because the machine language we use to communicate with computers and phones is composed of 0s and 1s, where 0 represents off and 1 represents on.<\/span><\/p>

In industrial control, switch operation 0 and1 are always realized by relays. So how many types of relays are there? In this blog post, we will walk through 8 of the most typical and widely used relays.<\/span><\/p>

Now, let’s begin!<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Qu'est-ce qu'un relais ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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To better understand each type of relay, we first need to know what a relay is.<\/span><\/p>

Simply put, a relay is a switch that can control a larger load (such as a 220VAC 30A heating element) with a smaller control signal (such as 5 VDC 20 mA). You can simply regard it as an electrically controlled switch for easy understanding. By using relays, you can effectively isolate low-voltage and high-voltage circuits, greatly improving electrical safety.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Electromagnetic relay<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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An electromagnetic relay, also known as a general-purpose relay or intermediate relay, is a product that uses an electromagnetic field at the control terminal to control the connection and disconnection of a circuit at the load terminal.<\/span><\/p>

Contacteurs CA<\/span><\/span><\/a> work on the same electromagnetic principle and are widely used with relays for high-power load control. For example, by supplying power to the coil inside an AC contactor, it generates an electromagnetic field that attracts the main contacts to close, thereby controlling the load circuit to start the load.<\/span><\/p>

For more information on electromagnetic relays, you can read this blog post: <\/span>Relais \u00e0 usage g\u00e9n\u00e9ral : Qu'est-ce que c'est et comment fonctionne-t-il ?<\/span><\/a><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Time relay<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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