This 12V 1 channel relay module allows 12V systems to safely switch high voltage or high current loads using optical isolation. The onboard SMD optocoupler electrically separates the control circuit from the relay switching circuit, helping protect your circuitry from voltage spikes, electrical noise, and back EMF generated by inductive loads. This version supports both high level and low level triggering via an onboard jumper.

Electrical Specifications

• Operating Voltage: 12V DC
• Trigger Current: 5mA
• Maximum Switching Load AC: 250V 10A
• Maximum Switching Load DC: 30V 10A
• Relay Outputs: NO Normally Open, NC Normally Closed, COM Common
• Module Dimensions: 50mm 26mm 18.5mm

Pin Configuration

• DC+ Positive power supply VCC
• DC- Negative power supply GND
• IN Control signal input high or low level selectable
• NO Normally Open relay interface
• COM Common relay interface
• NC Normally Closed relay interface
• H / L Jumper pins that switch between High and Low level trigger

Key Features

• High / Low Level Switching: Selectable high or low level trigger via onboard jumper for flexible control compatibility
• SMD optocoupler isolation: Improved protection by isolating control from switching circuit, reducing interference, and stabilising performance. Optical isolation ensures safe operation when controlling high voltage or current loads.
• Fault tolerant design: Prevents unintended relay activation if the control signal line is disconnected
• Integrated LEDs: Green power indicator LED and red relay status LED for clear visual feedback
• Screw terminals: Clearly labelled screw terminals for secure and convenient wiring connections

Typical Applications

Perfect for 12V home automation systems, car electronics, solar projects, security systems, lighting, pumps, motors, and other AC or DC loads. This 12V 1 channel optocoupler relay module is designed for reliable control in 12V environments where electrical isolation and stable performance are required.

Explore More Relay Modules

If you’re looking for a relay with a different number of channels, check out our 12V Relay Modules collection. For other 5V variants of this relay, browse our5V Relay Modules collection.