Relay Module (3 V / 5 V, 3 A)
Electromagnetic relay module — switch bigger loads with a tiny control signal, active-low with indicator.
- Material
- PCB & electronic components
- Age range
- 8+
- Category
- STEM Robotics & Electronics
- Customisation
- OEM & ODM available
Specifications, component counts and packaging are configurable. Figures shown reflect our standard configuration.
Key features
- An automatic switch: a small current and low voltage control a larger current at higher voltage.
- Auto-regulation, safety protection and circuit conversion in automatic-control circuits.
- New revision adds a power-management chip for both 3.3 V and 5 V systems, an indicator LED, and active-low operation (LED on when active).
Frequently asked about this product
How do I connect the Relay Module (3 V / 5 V, 3 A) to my controller board?
The Relay Module (3 V / 5 V, 3 A) uses the standard 3-pin GVS (Ground-VCC-Signal) interface with an XH2.54 connector, so it plugs straight into Arduino UNO, ESP32, micro:bit and our sensor shields with a regular sensor cable — no soldering required. It works with Arduino IDE, Mixly, Mind+, Scratch and mBlock.
What voltage does the Relay Module (3 V / 5 V, 3 A) run on?
The Relay Module (3 V / 5 V, 3 A) has separate logic and load supplies: the logic side takes 3.3-5 V from the controller, while motors or high-current outputs are fed from their own 5-12 V supply through the dedicated power terminal. Never power the load side from the controller’s 5 V pin.
What projects is the Relay Module (3 V / 5 V, 3 A) good for?
The Relay Module (3 V / 5 V, 3 A) is built for STEM and robotics education: classroom demonstrations, science-fair projects, robotics club builds and competition robots. It pairs with the rest of our module range — same connectors, same voltage, same toolchain — so students move from first circuit to competition robot without changing platforms.
What certification do the robotics and electronics products carry?
Controller boards, sensors and modules ship with CE marking and RoHS-compliant components, and the range is designed for classroom use under teacher supervision. Product-specific test reports and declarations of conformity are available for distributors on request.
What is the minimum order quantity, and can I get a sample first?
These are standard catalogue lines with stable production, so minimums are low and lead times are short. Samples ship within about a week and are normally credited against a first order. Mixed-SKU cartons are accepted for evaluation orders.
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Need pricing on this line?
Send your target quantity, destination market and any changes you need to artwork, colourway or packaging. We reply with a quotation and the applicable compliance route — usually within one working day.