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One-Channel Relay Board for 12V Control Systems
The Relay 1 Channel 12V Level Trigger Optocoupler Module is a one-channel relay module built for 12V class control systems that need a ready-made relay output board instead of a raw relay component. It includes an optocoupler and standard NO / COM / NC relay terminals for easier integration.
This is a useful option for control panels, industrial-style logic, trigger circuits, and other builds where the controller side does not run at the usual 5V relay-board level.
Important: Choose the version that matches your control-side voltage. Some board revisions also let you choose high-level or low-level trigger mode by jumper.
Why you'll like it
- Ready-made relay board: Faster than building a driver circuit from scratch
- Optocoupler isolation: Better separation between controller and relay side
- NO / COM / NC outputs: Flexible wiring choices
- 12V class control: Better matched to higher-voltage logic systems
- Mounting holes included: Easy installation into enclosures
What you can build
Use it for control panels, machines, alarm systems, higher-voltage trigger circuits, and other systems that need a simple isolated relay output board.
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 1 Channel 12V Level Trigger Optocoupler Module |
|---|---|
| Channels | 1 |
| Control / supply | 12V class |
| Trigger current | About 5mA |
| Relay load | AC 250V / 10A or DC 30V / 10A |
| Board size | 50 × 26 × 18.5mm |
| Mounting holes | 4 holes, about 3.1mm diameter |
| Output terminals | NO / COM / NC |
Compare the control-voltage versions
| Version | Control / supply | Trigger current | Load rating | Output terminals | Best fit |
|---|---|---|---|---|---|
| 9V Level Trigger | 9V class control | ~5mA | 10A @ 250VAC / 10A @ 30VDC | NO / COM / NC | 9V control circuits |
| 12V Level Trigger | 12V class control | ~5mA | 10A @ 250VAC / 10A @ 30VDC | NO / COM / NC | 12V controllers and panels |
| 24V Level Trigger | 24V class control | ~5mA | 10A @ 250VAC / 10A @ 30VDC | NO / COM / NC | 24V automation systems |
Pinout & power notes
DC+ goes to the module supply positive, DC- goes to ground, and IN is the control input. The switched side uses NO, COM, and NC. Check the jumper setting if your board supports high and low trigger options.
What’s in the box
1 × Relay 1 Channel 12V Level Trigger Optocoupler Module
Frequently Asked Questions
Why choose this instead of a 5V relay board?
It better matches systems that already use 9V, 12V, or 24V control signals.
It better matches systems that already use 9V, 12V, or 24V control signals.
What does the optocoupler do?
It helps isolate the input side from the relay side.
It helps isolate the input side from the relay side.
Can I use NO or NC?
Yes. The board exposes both terminals plus COM.
Yes. The board exposes both terminals plus COM.
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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