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HiLetgo 12V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger

4.4 4.4 out of 5 stars 407 ratings

$5.89
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Purchase options and add-ons

Connector Type Terminal Leads
Contact Material Silver
Contact Type Normally Open, Normally Closed
Current Rating 10 Amps
Mounting Type Screw Mount

About this item

  • Module uses genuine high quality relay, normally open interface maximum load: AC 250V / 10A, DC 30V / 10A
  • Using optocoupler chip isolation, strong drive capability, stable performance; trigger current 5mA
  • Module can be set by jumper high or low trigger
  • Fault-tolerant design, even if the control line is broken, the relay will not move
  • The interface design of human nature, all interfaces are available through a direct connection terminal leads, very convenient

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This item: HiLetgo 12V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger
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Product Description

Module description:
Module Size: 50mm * 26mm * 18.5mm (L * W * H)
With four fixed bolt holes, holes 3.1mm, spacing 44.5mm * 20.5mm
Power Indicator (green), Relay Status Indicator (red)

Interface:
Input:
VCC: Relay power supply +
GND: Relay power supply -
IN: Signal trigger input (High or Low Level Signal, select via jumper)

Output:
NO: Relay normally open.
COM: Relay Common Pin
NC: Relay normally closed.

Package Included:
1*12V 1 Channel Relay Module With Optocoupler Isolation

How to provide an auto shut-down for Prusa i3 Mk2S?
1. Wired it in parallel with the power switch.
2. Use the hotend fan power as the trigger.
3. When you run a long print ,start the printer and when the hotend fan turns on (at about 50C) you can turn off the power switch.
4.The printer continues to run until the print is finished and the hotend cools below 50C. At that point the relay is no longer powered and the printer shuts itself off.

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HiLetgo 12V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger
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Price$5.89$7.99$12.99$7.39$6.99$5.99
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Get it as soon as Saturday, Mar 29
Get it as soon as Saturday, Mar 29
Get it as soon as Saturday, Mar 29
Get it as soon as Saturday, Mar 29
Get it as soon as Saturday, Mar 29
Get it as soon as Saturday, Mar 29
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HiLetgo 12V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger


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Customer reviews

4.4 out of 5 stars
407 global ratings

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Customers say

Customers find that the relay works well and is a good value for the price. They appreciate its reliability, ease of use, and size. However, some customers have experienced issues with quality control, such as defective units and minor clicks from inside the relay. There are mixed opinions on relay quality.

AI-generated from the text of customer reviews

41 customers mention "Functionality"30 positive11 negative

Customers like the relay's functionality. They say it works well, is reliable, and solves their issues. Some mention using it to turn on/off led strips for lighting effects.

"...into the Ps1000 switch input and it does the trick so far super reliably...." Read more

"This relay module works well. It can be triggered by connecting to power or ground depending on how the jumper is set...." Read more

"...It works like a charm...." Read more

"I used this product only 2 months. Today it was stopped working. When bought at new it working very good and relay response very fast...." Read more

7 customers mention "Value for money"7 positive0 negative

Customers appreciate the relay's value for money. They say it's a good price.

"This little thing was inexpensive and works perfectly for what I need it's very minor but my only complaint would be two things when it's powered on..." Read more

"...Perfect for my application. Small size, Functional,Light weight,Inexpensive." Read more

"I like the device being compact and inexpensive." Read more

"Good item, exelente price." Read more

3 customers mention "Ease of use"3 positive0 negative

Customers find the product easy to use. They say it turns the fireplace on and off using the wall switch, and that it's simple to desolder and flip the terminal.

"...It works like a charm. Now I can turn the fireplace on and off easily using the wall switch and I don't have to fiddle with the bottom access panel..." Read more

"...It was easy enough to desolder and flip the terminal.. but should have been caught. It worked fine after...." Read more

"Easy to use 12-volt powered switch...." Read more

3 customers mention "Size"3 positive0 negative

Customers appreciate the relay's small size and lightweight design. They find it functional and suitable for their needs.

"...thing was inexpensive and works perfectly for what I need it's very minor but my only complaint would be two things when it's powered on it's got..." Read more

"...Perfect for my application. Small size, Functional,Light weight,Inexpensive." Read more

"I like the device being compact and inexpensive." Read more

7 customers mention "Relay quality"3 positive4 negative

Customers have different experiences with the relay quality. Some say it's a good single module relay and the receiver turns on, energizes the relay, opening the output leg. Others report issues with the relay not triggering or the LED turning on/off but the relay not working properly.

"...This relay is garbage. I'm only using to trigger 3 car stereo Amplifiers simultaneously as the 2.5v 800mA trigger signal I have is not enough...." Read more

"...When the receiver is turned on, the relay is energized, which opens the output leg and turns on the amp." Read more

"...Looks like the relay itself is bad. The second one I ordered worked fine. The trigger input is very sensitive...." Read more

"Good Single Module Relay..." Read more

5 customers mention "Quality control"0 positive5 negative

Customers are unhappy with the product quality. They mention defective products and easy breakage.

"As the title says, I ordered two of these, but one was defective...." Read more

"Don't know if it was just me or if the quality controll is just this terrible, but right out of the anti static bag I noticed this diode was..." Read more

"Good products but easy broken...." Read more

"Lacks quality control..." Read more

3 customers mention "Click accuracy"0 positive3 negative

Customers are unhappy with the click accuracy. They say the light is hard to see from inside, and the click is pretty minor.

"...inside of the fireplace I can't see the light and the click is pretty minor from inside but you can still hear it but at $6 I would buy this all day..." Read more

"Item dead on arrival. Lights up but solenoid does not click." Read more

"...LED lights up like it's activated but no clicking from the relay. Bummer." Read more

I used this with Amazon Alexa to turn on my fireplace
5 out of 5 stars
I used this with Amazon Alexa to turn on my fireplace
Our Gas Fire comes on with an open/close switch and the power comes on with an AC power switch. I installed an Alexa control switch in replace of the AC. I connected this up to the other switch so when I tell Alexa to "Turn on Fireplace". It closes the rely and lights the fire. I wired the original switch in series so I can still kill the flame with the original switch and not have to worry about turning the power off to the fan.
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Top reviews from the United States

  • Reviewed in the United States on June 9, 2020
    Used to connect 12-volt trigger from a A/V Receiver (Denon but another's work the same) to flip the input switch on a Pyle Ps1000 power sequencer. The sequencer powers up my sub-amps and other devices I want to power-on when I power on the receiver. Just wired ground and 12-volt from the mono-mini audio output connect (trigger out) to the ground and 12-volt on the switch. Lights it up and shows it is working. Wired ground and red-wire (sorry not sure on the pin-out 4 DIN input cable that came with the Ps1000 but testing it manually was easy) into the Ps1000 switch input and it does the trick so far super reliably. Would be nice if this has a little case to keep the switch in - it is just sitting on the shelf behind my A/V equipment.
    One person found this helpful
    Report
  • Reviewed in the United States on September 19, 2018
    This relay module works well. It can be triggered by connecting to power or ground depending on how the jumper is set. Web page says 5 ma but that is for the trigger, the relay takes 43 ma at 12.5 volts when the relay is on and takes 5 ma when the relay is off. I was going to use this for a solar power for a project but even though 43 ma operating current is relatively low, I need every ma so wasting 43 ma on the relay will not work so I am going to look for a latching relay. If you need a relay triggered by a low current then this might work for you.
    12 people found this helpful
    Report
  • Reviewed in the United States on February 20, 2025
    I used this product only 2 months. Today it was stopped working. When bought at new it working very good and relay response very fast. Now stop working and data leg not receiving and responding signal anymore. Recommend for testing only.
  • Reviewed in the United States on November 14, 2024
    They work but weren't correct for the application I was using them for
  • Reviewed in the United States on December 14, 2018
    I needed a relay for my fireplace. I was tired of opening the bottom access panel to turn the fireplace on and off. Fortunately, I had a 110 volt outlet in there that was switched on the wall. This was used for the fireplace fan. So I hooked up this relay to an old 12V power supply I had laying around and plugged it into the switched outlet. Then I spliced the wires for the little toggle switch that lights the fireplace and connected to the relay. It works like a charm. Now I can turn the fireplace on and off easily using the wall switch and I don't have to fiddle with the bottom access panel any more.
    6 people found this helpful
    Report
  • Reviewed in the United States on October 13, 2021
    Using this on my sailboat for a dry bilge system. It worked perfectly with both salt and fresh water from my tap. I'm combining it with a digital timer switch, a sponge pickup, and small diaphragm pump. The dry bilge system will check for water below the level of the main bilge pump float switch once or twice each day, and allow the pump to run for some set period of time if it detects water, and will quit after the time allowed - or if the water is removed - whichever comes first.
  • Reviewed in the United States on January 8, 2023
    This relay did not work as intended. Usually a relay will energize its output terminals when a trigger signal is supplied. This one did not. Nor did the first one i ordered. I sent the first one back. Second one additionaly had defective phippips head clamp terminals. Had to solder my DC+ wire to the terminal. The fix for this relay is a jumper wire from the Dc+ to the COM output. The relay switches just fine but without the jumper wire no power to any of the output terminals. The relay is so sensitive that it functions with the 2.5v 800mA Dc trigger signal while on the high jumper setting. The low jumper setting was defective on both relays and did nothing.

    This relay is garbage. I'm only using to trigger 3 car stereo Amplifiers simultaneously as the 2.5v 800mA trigger signal I have is not enough. This is a non critical low amparage application. My load is probably less than 1.5amps @12v. Highly not recommended for anything critical or safety related.
    2 people found this helpful
    Report
  • Reviewed in the United States on August 11, 2022
    The relays work as intended but the normally closed contacts are very susceptible to even small vibrations. Tap the relay and the N/C contact opens temporarily. This can have a big impact depending on the application. One of the two relays I received was behaving this way.

Top reviews from other countries

  • Francisco
    5.0 out of 5 stars Five Stars
    Reviewed in Canada on March 29, 2017
    work great