2 Channel Relay Optocoupler -5/12Volt

The 2-Channel Relay Module with Optocoupler Isolation is a dual-channel electronic switch board designed to safely control high-current AC or DC loads using low-power signals from a microcontroller. Available in distinct 5V or 12V operating voltage variants, this module acts as a bridge between low-voltage control circuits and high-voltage appliances. [1, 2, 3, 4, 5]

Key Technical Specifications

• Load Capacity: Switches up to 10A at 250V AC or 10A at 30V DC per channel. [1, 2]
• Electrical Isolation: Built-in SMD optocouplers physically separate the control logic from high-voltage circuits to prevent back-EMF damage. [1, 2, 3, 4, 5]
• Trigger Flexibility: Supports High-Level or Low-Level triggers, configurable via physical onboard jumpers. [1, 2]
• Control Current: Requires a minimal trigger current of only 5mA. [1]
• Output Contacts: Provides both Normally Open (NO) and Normally Closed (NC) screw terminals for each relay. [1, 2]
• Safety & Diagnostics: Features a onboard fault-tolerant design alongside integrated LED indicators for power and real-time relay status. [1, 2]

Primary Applications

• Microcontroller Projects: Safely interfaces with Arduino boards, Raspberry Pi, ESP32, and general TTL logic.
• Home Automation: Operates heavy mains appliances like lights, fans, pumps, and heaters.
• Industrial Controls: Safely manages physical machinery, valves, and security system sirens. [1, 2, 3]