5V 1 Channel H/L Level Trigger Optocoupler Relay Module For Arduino

Control high-power AC and DC loads from your Arduino or Raspberry Pi with this optocoupler-isolated relay module. The jumper-selectable high/low level trigger gives you flexibility, while optical isolation protects your microcontroller from electrical noise and back-EMF.

Features fail-safe design—if the control line is disconnected, the relay stays off. Status LEDs show power and relay state at a glance.

Key Features

• Optocoupler Isolated – Protects your microcontroller from relay noise
• Selectable Trigger Level – Jumper to choose high or low level activation
• Fail-Safe Design – Relay won't activate if control line breaks
• Status LEDs – Green for power, red for relay state
• Screw Terminals – Easy connection for loads
• Mounting Holes – Four 3.1mm holes for secure installation

Specifications

• Operating Voltage: 5V DC
• Trigger Current: 5mA
• Max AC Load: 250V / 10A
• Max DC Load: 30V / 10A
• Channels: 1
• Dimensions: 50 × 26 × 18.5mm

Pin Configuration

• DC+: Power supply positive (VCC)
• DC-: Power supply negative (GND)
• IN: Control signal input
• NO: Normally Open contact
• COM: Common contact
• NC: Normally Closed contact

Ideal For

• Home automation
• Appliance control
• Lighting control systems
• Motor switching
• Arduino and Raspberry Pi projects

Package Contents

• 1× 5V 1-Channel Optocoupler Relay Module