ElecFreaks
1 Channel 5V Relay Module Arduino Compatible BK008
A single-channel 5 V relay module that allows a microcontroller to switch high-voltage electrical devices up to 250 VAC or 110 VDC. Controlled via a standard...
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A single-channel 5 V relay module that allows a microcontroller to switch high-voltage electrical devices up to 250 VAC or 110 VDC. Controlled via a standard TTL-level digital IO pin, it works with Arduino and other popular microcontrollers.
The module uses an SRD relay with optocoupler isolation (EL817) and includes a status LED to indicate whether the relay is energised. Its compact form factor is designed for dense PCB mounting.
Key Features
- Channels – 1
- Control Signal – TTL level (digital IO)
- Max Allowable Voltage – 250 VAC / 110 VDC
- Switching Capacity – 10 A
- Max Allowable Power – From C: 800 VAC / 240 W; From A: 1200 VA / 300 W
- Status LED – Indicates relay state
- Certifications – UL, CUL, TUV recognised
Ideal For
- Switching lights, motors, solenoid valves, and other high-current devices
- Arduino and microcontroller home automation projects
- Interactive installations requiring mains-voltage control
Package Contents
- 1× Single-channel 5 V relay module
Jargon buster
Plain-language definitions for the technical terms used above.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- Relay module
- A relay module uses an electrically controlled switch to let a low-power microcontroller control a separate circuit. It matters when switching devices that need different voltages or more current than a microcontroller pin can safely handle.
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