12V 2-way electromagnetic relay module low level trigger without optocoupler with light

Description

Product Overview

The 12V 2-Way Electromagnetic Relay Module is a simple, cost-effective switching solution designed to control two independent high-power AC or DC loads directly from a 12V logic or control system. Unlike more complex relay modules that incorporate optocoupler isolation, this module uses a direct transistor driver circuit (typically NPN transistors such as 2N2222, BC547, or S8050) to activate each relay coil . This design offers a lower cost and simpler circuit, making it ideal for automotive applications, PLC control systems, industrial panels, and projects where isolation is not critical.

This dual-channel module allows you to control two separate devices independently from your 12V controller. With each relay rated for 10A at 250V AC or 10A at 30V DC, it can handle lights, fans, motors, pumps, solenoids, and other industrial or automotive equipment . Onboard status LEDs provide visual confirmation when each relay is activated, simplifying operation monitoring and troubleshooting.

Designed with a low-level trigger, the relays activate when the control pins are pulled LOW (0V) and deactivate when pulled HIGH (12V) . This active-LOW behavior provides a degree of safety—the relays remain off during power-up or if the control signal is lost, preventing accidental activation of connected devices.

Important Note: This module does not include optocoupler isolation. The control circuit and the high-voltage load share a common ground path . Exercise caution when wiring high-voltage loads and ensure proper insulation and clearance for safety.

Key Features

• Dual Independent Channels: Two separate relay channels allow independent control of two different loads from a single module .

• Low-Level Trigger (Active LOW): Each relay activates when its corresponding IN pin is pulled LOW (0V) and deactivates when HIGH (12V). This ensures the relays remain off during power-up .

• Direct Transistor Drive: Uses simple NPN transistors to drive each relay coil, eliminating the need for optocoupler components .

• 10A High Switching Capacity: Each relay contacts rated for 10A at 250V AC or 10A at 30V DC, suitable for controlling lights, fans, motors, pumps, and industrial equipment .

• SPDT Contact Configuration: Each channel provides Common (COM), Normally Open (NO), and Normally Closed (NC) terminals for maximum wiring flexibility—use NO for OFF-by-default operation or NC for ON-by-default operation .

• Status Indicator LEDs: Onboard LEDs for each channel illuminate when the corresponding relay is activated (IN pin LOW), providing clear visual feedback .

• 12V Logic Compatibility: Designed for 12V automotive systems, PLC control, and industrial controllers, with a control signal range of 0V–12V .

• Fault-Tolerant Design: Even if the control line is disconnected or broken, the relay will not operate unintentionally, ensuring fail-safe behavior .

• Compact and Lightweight: Small PCB footprint with mounting holes (3.1mm diameter) for easy integration into control panels, automotive fuse boxes, or enclosures .

Technical Specifications