12V Single Channel Optocoupler Isolated Relay Module – Low Level Trigger

Description

Product Overview

The 12V Single Channel Optocoupler Isolated Relay Module is a robust, high-performance control module designed for reliable switching of high-power AC or DC loads from a 12V control system. Whether you’re working with automotive electronics, industrial control panels, PLC systems, or 12V battery-powered applications, this module provides a safe and efficient interface between your 12V logic and the high-voltage load side .

At its core is a high-quality electromagnetic relay capable of switching loads up to 10A at 250V AC or 10A at 30V DC. The module features optocoupler isolation, which creates a complete electrical barrier between your control circuit and the potentially hazardous load side. This isolation protects your sensitive control electronics from dangerous voltage spikes, back-EMF from motors, and electrical noise common in industrial environments .

Designed with a low-level trigger, this module is activated when you apply a LOW signal (0V) to the input pin. This default behavior ensures that the relay remains off during power-up or if the control signal is lost, preventing accidental activation of connected devices . An onboard status LED provides clear visual confirmation of relay operation, and the module’s compact design allows for easy integration into control cabinets, breadboards, or custom enclosures.

Key Features

• Optocoupler Isolation: Provides complete electrical isolation between the control side (12V logic) and the load side (up to 250V AC), protecting your controller from voltage spikes and electrical noise

• High Load Capacity: SPDT relay contacts rated for 10A at 250V AC or 10A at 30V DC, suitable for controlling motors, solenoids, lighting, pumps, and industrial equipment

• Low Level Trigger: The relay activates when the IN pin is pulled LOW (0V). This “active LOW” design enhances safety—the relay remains off during power-up or if the control signal is lost

• 12V DC Operation: Designed for 12V control systems, making it ideal for automotive applications, PLCs, industrial controllers, and battery-powered projects

• SPDT Contact Configuration: Provides Common (COM), Normally Open (NO), and Normally Closed (NC) terminals for maximum wiring flexibility

• Clear Status Indicators: Onboard LEDs provide visual feedback: a power LED (green) lights when the module is powered, and a relay status LED (red) illuminates when the relay is activated

• Easy 3-Pin Control Interface: Standard header with VCC (12V), GND, and IN (control signal) allows direct connection to microcontrollers, PLCs, or manual switches

• Compact and Durable: Small form factor with mounting holes for secure installation. The isolation slot between control and load areas enhances safety

Technical Specifications