![]() This is the part of the module that is in contact with mains so a reliable connection is needed. ![]() The single-channel relay module is much more than just a plain relay, it contains components that make switching and connection easier and act as indicators to show if the module is powered and if the relay is active.įirst is the screw terminal block. Understanding 5V Single-Channel Relay Module ![]() The following are the major components present on a relay module we will get into the details later in this article.ĥV Relay, Transistor, Diode, LEDs, Resistors, Male Header pins, 3-pin screw-type terminal connector, etc. Relay maximum contact voltage – 250VAC or 30VDCĭual-channel relay module, four-channel relay module, 8-channel relay module.Ĭomponents Present on a 5V Single Channel Relay Module.Current when the relay is active: ~70mA.Single-Channel Relay Module Specifications Single-Channel Relay Module Pin Description Relay is an electromechanical device that uses an electric current to open or close the contacts of a switch. The single-channel relay module is much more than just a plain relay, it comprises of components that make switching and connection easier and act as indicators to show if the module is powered and if the relay is active or not.
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