12V Single Channel Relay Module

Product Description

The 12V 1 Channel 10A Low Level Trigger Relay Module is a compact and easy-to-use relay board designed to control AC and DC electrical loads using Arduino, Raspberry Pi, other microcontrollers, or low-voltage control circuits. It provides a convenient way to switch devices such as lights, fans, pumps, motors, and other compatible appliances.

The module uses a high-quality relay with a maximum switching capacity of 10A at 250V AC and 10A at 30V DC as specified. The relay provides COM, NO, and NC contacts through a convenient 3-pin screw terminal, making load connections easy to install and remove.

The board features separate power and relay status LED indicators, making it easier to monitor the module’s operating condition and troubleshoot connections. Power input and control signals are available through header pins, allowing convenient connection to development boards using compatible jumper wires.

The module supports a wide control input range of approximately 4V to 12V, making it suitable for a variety of low-voltage control applications.

Features

• Single-channel relay module
• 12V relay operation
• Low-level trigger design
• 10A switching capability
• Supports AC and DC loads
• COM, NO, and NC relay contacts
• Convenient 3-pin screw terminal
• Power indicator LED
• Relay status indicator LED
• Header pins for power and control connections
• Compatible with Arduino, Raspberry Pi, and other controllers
• Compact and lightweight design
• Suitable for lights, fans, pumps, motors, and appliances

Specifications

Parameter	Specification
Product Type	1 Channel Relay Module
Relay Voltage	12V DC
Trigger Type	Low Level
Trigger Voltage	12V DC
Trigger Current	20 mA
Switching Voltage	250V AC @ 10A
DC Switching Rating	30V DC @ 10A
Operating Temperature	-40°C to 85°C
Operating Relative Humidity	20% – 85% RH
Storage Temperature	-65°C to 125°C
Dimensions	48 × 29 × 17 mm
Weight	Approximately 15 g
Channels	1
Output Terminals	NO, COM, NC

Pin and Terminal Configuration

Terminal / Pin	Function
VCC	Relay module power input
GND	Ground connection
IN	Relay control input
NO	Normally Open relay contact
COM	Common relay contact
NC	Normally Closed relay contact

Design and Construction

The module features a compact PCB with an onboard relay, control circuit, LED indicators, header pins, and screw terminals. The 3-pin screw terminal provides easy access to the relay’s COM, NO, and NC contacts for connecting the load.

The onboard LEDs provide visual indication of the module’s power and relay operating status. Header pins for power and control signals make it convenient to connect the relay module to development boards using suitable jumper wires.

Its compact 48 × 29 × 17 mm form factor allows it to be easily integrated into electronics projects and control panels.

Working Principle

The relay is controlled through the IN control pin. When the module receives the appropriate low-level trigger signal, the relay coil is energized and the relay changes its contact state.

In the activated state, the COM and NO contacts are connected, allowing a normally disconnected load circuit to be switched ON. When the relay is inactive, COM and NC remain connected, allowing normally closed operation.

This enables a low-voltage microcontroller signal to control a separate electrical load through the relay’s isolated switching contacts.

Relay Output

• NO (Normally Open): The contact remains open when the relay is inactive and closes with COM when the relay is activated.
• COM (Common): Common relay contact used for connecting the load circuit.
• NC (Normally Closed): The contact remains connected to COM when the relay is inactive and opens when the relay is activated.

Applications

• Arduino relay control
• Raspberry Pi projects
• Home automation
• Appliance switching
• Light control
• Fan control
• Water pump control
• Motor switching
• Solenoid control
• DIY electronics
• Industrial automation prototypes
• IoT projects
• Low-voltage control systems
• Electrical load switching

Package Includes

• 1 × 12V 1 Channel Low Level Trigger Relay Module for Arduino

Product Disclaimer

The relay’s specified contact rating should be considered when selecting a load. Motors, pumps, transformers, and other inductive loads may require additional protection against switching transients.

High-voltage AC connections can be hazardous. Use appropriate insulation, wiring, fusing, and electrical safety practices when connecting mains-powered appliances.

Arduino, Raspberry Pi, jumper wires, power supplies, appliances, motors, and other accessories are not included unless specifically mentioned in the package contents.

Product images are for representation only. The actual product may differ slightly in appearance, colour, component placement, or terminal configuration depending on the manufacturing batch.