The 4 Channel 12V Relay Module is a heavy-duty multi-relay board designed to control up to four independent AC or DC loads using a 12 V control signal. Each relay features optocoupler isolation to protect sensitive control electronics and ensure stable operation, making it ideal for home automation, industrial machinery control, and complex DIY projects. It safely interfaces low-voltage control systems with high-power devices such as lights, pumps, fans, and motors.
Technical Specifications
Core Specifications
Operating voltage: 12 V DC
Trigger voltage: 12 V DC (compatible with 12 V logic systems)
Relay type: SPDT (Single Pole Double Throw) per channel
Load capacity: 10 A at 250 V AC or 10 A at 30 V DC for each relay
Trigger current: approximately 15–20 mA per channel
Electrical & Physical
Four independent relay channels with optocoupler isolation
LED indicators for power and individual relay status
Screw terminals for secure AC/DC load connections
Signal input pins for IN1, IN2, IN3, IN4, VCC, and GND
Module dimensions approximately 75 mm × 55 mm × 18 mm
Environmental
Operating temperature range: –40 °C to +85 °C
Reliable operation in indoor and industrial environments
Why Choose the 4 Channel 12V Relay Module
Controls four separate AC or DC loads from one compact board
Optocoupler isolation protects microcontrollers from voltage spikes
Compatible with 12 V automation systems and microcontroller platforms
Critical Uses
Smart home automation for lights, fans, and appliances
Industrial automation for controlling multiple motors or pumps
Remote-controlled switching systems and IoT applications
Advanced DIY robotics and automation projects requiring 12 V logic
Pro Tips
Connect the module ground to the control system ground for proper triggering
Ensure each connected load does not exceed the rated current per relay
Use proper insulation and wiring when switching high-voltage AC circuits
Package Includes
1 × 4 Channel 12V Relay Module