Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
Low-Voltage 3V Control Relay Module for Compact Logic Projects
The 3V Relay Module AC 24V 7A / DC 24V 10A is a low-voltage control relay board made for projects that run from 3V or 3.3V class logic and still need a relay output. It helps smaller controller systems switch moderate loads without adding a custom relay driver circuit.
This makes it a useful option for compact electronics, battery-based builds, and other designs where a 5V relay board is not the best match.
Important: The control side and load side are separate. The 3V input drives the relay module, while the relay contacts switch a different circuit.
Why you'll like it
- 3V class control: Better matched to lower-voltage logic
- Compact board: Easy to place in small builds
- Simple relay output: Good for moderate switched loads
- Mounting holes: Easier mechanical installation
- Good for battery or compact projects: A helpful alternative to 5V relay modules
What you can build
Use it for low-voltage controller projects, compact control boxes, signal-driven switching, and moderate-load relay tasks that fit the listed rating.
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 | 3V Relay Module AC 24V 7A / DC 24V 10A |
|---|---|
| Control side | 3V / 3.3V class |
| Load rating | AC 24V 7A / DC 24V 10A |
| Board size | 50 × 26 × 17mm class |
| PCB size | 50 × 26 × 1.6mm |
| Mounting | 3.15mm aperture, 19mm × 42mm spacing |
| Main terminals | VCC, GND, IN, output contacts |
Pinout & power notes
Connect VCC to the positive control supply, GND to ground, and IN to the 3V control signal. The relay output side then switches the target load using the common and switched terminals.
What’s in the box
1 × 3V Relay Module
Frequently Asked Questions
Why choose a 3V relay module?
It is easier to match with low-voltage logic or compact battery projects.
It is easier to match with low-voltage logic or compact battery projects.
Can it switch AC and DC loads?
Yes, within the listed contact ratings.
Yes, within the listed contact ratings.
Is this the same as a 5V relay board?
No. The main difference is the lower-voltage control side.
No. The main difference is the lower-voltage control side.
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.
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →