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Two High-Current Relay Outputs on One Board
The Relay Large Current 30A 2 Channel Module is built for projects that need two heavier outputs on one relay board. It combines high-current relay capacity with easier controller integration through a 5V supply and logic-friendly input stage.
This board is useful for dual-load automation, machine control, custom power panels, and Arduino or Raspberry Pi builds that need more than a small relay module can safely offer.
Important: This board includes optocoupler isolation and is friendly to 3.3V or 5V logic, but the load side still needs proper mains and high-current wiring practice.
Why you'll like it
- Two 30A-class outputs: Switch two larger loads from one board
- 5V supply: Easy to power from common systems
- 3.3V / 5V logic friendly: Good for Raspberry Pi and Arduino use
- Optocoupler isolation: Adds protection between controller and relay side
- High / low trigger flexibility: Easier to match project logic
What you can build
Good for paired pumps, dual heaters, two high-current DC outputs, or mixed automation loads in one enclosure.
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 2 Channel Module |
|---|---|
| Channels | 2 |
| Working voltage | DC 5V |
| Logic level support | 3.3V / 5V logic operation |
| Max control capacity | 30A @ 250VAC or 30A @ 30VDC |
| Isolation | Optocoupler isolation |
| Trigger option | High or Low via header selection |
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 5V, wire your controller to the input side, then connect each heavy load to its relay terminals. Set the trigger mode to match your controller logic before use.
What’s in the box
1 × Relay Large Current 30A 2 Channel Module
Frequently Asked Questions
Can Raspberry Pi drive this board?
Yes. The listing notes support for 3.3V and 5V logic levels.
Yes. The listing notes support for 3.3V and 5V logic levels.
Why is optocoupler isolation useful?
It helps separate the controller side from the relay side and reduces risk from noise and spikes.
It helps separate the controller side from the relay side and reduces risk from noise and spikes.
Can I trigger it high or low?
Yes. This board includes a header that lets you choose the active level.
Yes. This board includes a header that lets you choose the active level.
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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