ElecFreaks
4 Channel 12V Relay Module BK_RL4_01
This 4-channel relay module allows you to control up to four independent circuits using a microcontroller such as Arduino, Raspberry Pi, or other MCU boards....
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This 4-channel relay module allows you to control up to four independent circuits using a microcontroller such as Arduino, Raspberry Pi, or other MCU boards. Each relay channel has an LED indicator that shows the current output state, making it easy to monitor which relays are active.
The modular design makes it simple to integrate into home automation, lighting control, and equipment switching projects. Each relay can switch loads up to 250V AC or 30V DC.
Key Features
- 4 Independent Channels – Control four separate circuits
- LED Status Indicators – Visual feedback for each relay state
- High Switching Capacity – Up to 250V AC / 30V DC
- TTL Control – Compatible with 5V, 12V, and 24V logic levels
- Compact Design – 50 × 70 × 15mm board
Specifications
- Channels – 4
- Drive Current – 20mA
- Control Signal – 5V / 12V / 24V TTL level
- Max Switching Voltage – 250V AC / 30V DC
- Dimensions – 50 × 70 × 15mm
Ideal For
- Home automation and lighting control
- Equipment and appliance switching
- Arduino and microcontroller projects
- Industrial control applications
Package Contents
- 1× 4-channel relay module
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- 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.
- 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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