5V 8-CHANNEL RELAY MODULE

Overview

The **5V 8-Channel Relay Module** is a versatile and widely used component for controlling multiple high-power devices using low-voltage control signals from a microcontroller. Each channel can independently switch loads up to 250V AC or 30V DC, making it suitable for a variety of automation and IoT projects.

Specifications

Operating Voltage: 5V DC
Trigger Voltage: 3.3V to 5V
Relay Capacity: 250V AC at 10A or 30V DC at 10A per channel
Number of Relays: 8
Trigger Type: Active LOW
Isolation: Optocoupler for safe operation
LED Indicator: Per channel, shows relay status
Dimensions: Approx. 135mm x 55mm

Pinout

Pin	Name	Description
1	VCC	5V power supply
2	GND	Ground
3-10	IN1-IN8	Control signal inputs for each relay

Relay Terminals

**COM (Common)**: Shared terminal for switching.
**NO (Normally Open)**: Open circuit until the relay is activated.
**NC (Normally Closed)**: Closed circuit until the relay is activated.

Working Principle

Each relay is triggered independently via its respective control pin (IN1-IN8). When the control pin is pulled LOW, the corresponding relay activates, connecting the Normally Open (NO) terminal to the Common (COM) terminal, allowing current to flow. The optocoupler ensures isolation between the microcontroller and high-voltage circuits, protecting your devices.