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Four Heavy-Duty Relay Outputs for Multi-Load Control
The Relay Large Current 30A 4 Channel Module gives you four larger relay outputs on one board for power-heavy projects. It is aimed at builders who need several high-current channels in a single control panel or automation box.
This is a practical choice for machine control, grouped load switching, custom power distribution, and bench systems that need more than standard 10A relay boards.
Important: Multi-channel high-current boards need careful layout, proper cable size, and enough spacing between low-voltage control wiring and the load side.
Why you'll like it
- Four channels: More heavy-load outputs in one module
- Low-level trigger: Easy logic control for many boards
- 5V control side: Common for DIY controllers
- Mounting holes built in: Easier panel installation
- Good for grouped loads: Cleaner than stacking separate boards
What you can build
Use it for multi-pump control, grouped power switching, machine outputs, heaters, fans, and other projects that need several large-current channels.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus jumper wires, a suitable power supply, and a small load for bench testing.
Recommended add-ons
Useful add-ons include terminal block, breadboard, power modules, fuses, and enclosure, especially when you are working with higher voltages or inductive loads.
Technical specifications
| Product | Relay Large Current 30A 4 Channel Module |
|---|---|
| Channels | 4 |
| Trigger mode | Low level trigger |
| Maximum operating current | About 50mA |
| Board size | 129 × 72 × 22mm |
| Positioning hole size | 126.5 × 69.5mm |
| Board weight | About 385g |
Compare the large-current relay family
| Version | Channels | Control side | Load class | Best fit |
|---|---|---|---|---|
| Single 30A Module | 1 | 5V control | 30A class relay switching | One heavy load |
| 2 Channel 30A Module | 2 | 5V supply, 3.3V/5V logic friendly | 30A class relay switching | Two high-current outputs |
| 4 Channel 30A Module | 4 | 5V control | 30A class relay switching | Several heavy loads from one board |
Pinout & power notes
Power the board from the specified control supply, then drive each channel from your controller. Route each heavy load through its own relay output and use a solid enclosure for safe operation.
What’s in the box
1 × Relay Large Current 30A 4 Channel Module
Frequently Asked Questions
Why use this instead of four small relays?
It is better suited to grouped heavy-load switching and keeps the wiring more organized.
It is better suited to grouped heavy-load switching and keeps the wiring more organized.
Is it low-level triggered?
Yes. The current listing notes low-level trigger operation.
Yes. The current listing notes low-level trigger operation.
Can I use all channels at once?
Yes, as long as each channel stays inside rating and your power wiring is designed for the combined load.
Yes, as long as each channel stays inside rating and your power wiring is designed for the combined load.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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