Red circuit board with four blue relays and blue terminal blocks ShillehTek 4-Channel 12V Relay Module Board

4-Channel 12V Relay Module Board for Arduino & Raspberry Pi

Name: 4-Channel 12V Relay Module Board for Arduino & Raspberry Pi
Brand: ShillehTek
SKU: ON-NHVM-9R0Q
Price: 7.5 USD
Availability: InStock

SKU ON-NHVM-9R0Q

$7.50 USD Shipping & tax calculated at checkout

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4-channel relay board powered by 12V, giving Arduino and Raspberry Pi four independent GPIO-controlled switches for automation.

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Overview

Product Overview

The 4-Channel 12V Relay Module Board lets an Arduino or Raspberry Pi control up to four devices independently while powering the relay side from a 12V supply. Each channel acts like an electrically controlled on/off switch, so your code can toggle lights, fans, pumps, valves, and other loads from simple GPIO trigger signals. This is a great option for control boxes and automation builds that already run on 12V power and need multiple switched outputs without wiring four separate relay boards.

Questions & answers

Frequently asked questions

Does this relay module work with Arduino and Raspberry Pi?

Yes. It is intended for Arduino and Raspberry Pi projects where GPIO outputs trigger relay channels. The relay side is powered from a 12V supply, so it fits control boxes and automation systems that already use 12V power.

Is this relay board ready to wire into a project?

The ShillehTek board is sold as a ready-to-use relay module, avoiding the need to assemble four separate relay circuits. You still need to wire the 12V relay supply, GPIO trigger inputs, and the external devices safely.

What voltage and control signals does this module use?

The relay side uses a 12V supply, and each of the four channels is controlled by a simple GPIO trigger signal from a microcontroller or single-board computer. Each channel behaves as an independent electrically controlled on/off switch.

Can this module control lights, fans, pumps, or valves?

Yes. It is designed for projects where code switches external loads such as lights, fans, pumps, valves, and similar devices. The four channels let one controller operate up to four devices independently instead of using separate relay boards.

Why is my 12V relay module not switching?

Check that the relay side has a proper 12V supply, the GPIO trigger wire is on the intended channel, and the device wiring is on the relay output contacts. Also verify your code is changing the GPIO state you connected.

Have other questions?

Chat with our US-based team — we usually reply fast.

What's included

Features & Specs

4 Independent Relay Outputs Control four separate loads with individual trigger inputs.

12V Relay Power Ideal for setups that already use a 12V supply for the relay side of the system.

Great for Automation Projects Perfect for multi-zone lighting, pumps, fans, solenoids, and valves.

Arduino + Raspberry Pi Compatible Simple GPIO triggering for each channel with common wiring patterns.

Cleaner Wiring in One Board Consolidates switching into a single module for tidier builds and easier debugging.

Reference

Documents

Full Product Manual ShillehTek 4-Channel 12V Relay Module Board for Arduino & Raspberry Pi | ShillehTek Product Manual In-depth setup guide with wiring, code examples, and troubleshooting.

Datasheet

Watch

Customer Reviews

Good Build Quality, Screw Terminals, Confusing Description

I ordered a 5V and a 24V, four-channel relay. They both came with the same SRD-05VDC-SL-C relay modules. One came as an eight-channel relay, despite having a label that it was a four-channel relay. I misunderstood the description and thought that the coil voltage was 24V. The build quality is decent, and the inputs have screw in terminal blocks, so it is more secure than simple pins. Overall, the build quality is good, but the description seems confusing if the voltage described is not the coil voltage. There also seems to be some quality inspection issues if the eight-channel relay I received was labeled as a four-channel relay.

Great Module

I got this module to experiment with my pi. So far, it's been working well without any issue and I am working on building an integration to be able to power cycle my network equipment and control it with the pi. It's been able to control the contacts without any issue and has worked just how I expected.

Good 4 channel relay.

Good relay module. Each relay is rated for up to 10 amps 250 volts AC. I have used many of these type of relay banks for automated switching of power to electrical outlets. These are handy for pretty much anything you want to toggle power to within spec. I have used them with raspberry pi's. These would not work well for higher power loads.The unit I received seemed to take some beating on its journey to the warehouse. The anti-static bag had a ton of indentations where the pins pressed up against the material. Given this all solder joints look solid and all 4 channels work well.

Good quality. Easy to use. An excellent value

This module can make controlling high current devices from logic inputs easy.You don't even need to solder anything and the connector blocks are well labeled and can take either flat or x screwdrivers. It even has mounting holes on the corners.Jumpers on the board let you choose active low or active high inputs for each of the relays.An LED shows that the board is powered and only draws a couple of milliamps.Each relay has an LED to show when it’s on. The relays draw about 90 mA when on.As you can see in one of the photos, a 5V input through a 1K resistor provides more than enough current to activate the relay drivers on the board. Nice!