ShillehTek 4-channel 24V relay module with blue relays and red circuit board

4-Channel 24V Relay Module for Arduino & Raspberry Pi

Name: 4-Channel 24V Relay Module for Arduino & Raspberry Pi
Brand: ShillehTek
SKU: H4-FSMI-M9W2
Price: 7.5 USD
Availability: InStock

SKU H4-FSMI-M9W2

$7.50 USD Shipping & tax calculated at checkout

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4-channel relay board powered by 24V, giving Arduino and Raspberry Pi four independent GPIO-controlled switches for automation.

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Overview

Product Overview

The ShillehTek 4-Channel 24V Relay Module lets an Arduino or Raspberry Pi control up to four devices independently, while the relay side is powered from a 24V supply. Each relay acts like an electronically controlled on/off switch, so your code can toggle multiple loads for automation panels, control boxes, and test setups. This is a great fit for industrial-style projects where 24V is already standard, and you want clean multi-output switching without wiring four separate relay boards.

Questions & answers

Frequently asked questions

Does this relay module work with Raspberry Pi?

This module is designed for Arduino and Raspberry Pi projects that need to control up to four devices independently. Use it where the relay side can be powered from a 24V supply and the controller wiring matches the module labels.

Do I need four separate relay boards?

No separate relay boards are needed for a four-output setup. One board provides four independently controlled relay channels, so your code can toggle multiple loads from a single Arduino or Raspberry Pi project.

What power supply does the relay side need?

The relay side of this module is powered from a 24V supply. The controller side sends signals to switch each relay, and each relay functions as an electronically controlled on/off switch for an external load.

Can this control automation panel devices?

Yes. It is a good fit for automation panels, control boxes, and test setups where 24V power is already standard and you need microcontroller control over multiple independent switched outputs.

Can this module switch my specific load safely?

Check the relay contact rating on the board or datasheet against your load’s voltage and current before connecting it. The product information confirms four-channel 24V relay-side operation, but it does not specify safe load ratings.

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.

24V Relay Power Ideal for systems that already run a 24V rail for relays and control hardware.

Great for Control Panels Perfect for multi-zone switching, automation cabinets, and bench test rigs.

Arduino + Raspberry Pi Triggering Simple GPIO control per channel for quick integration.

Cleaner Wiring One board replaces multiple single relays and keeps builds organized.

Reference

Documents

Full Product Manual ShillehTek 4-Channel 24V Relay Module 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!