Relay Module (1-Channel)

Overview: Reliable 1-Channel Relay Module for Precise Switching

This 1-channel relay module provides a simple and robust interface between low-voltage microcontrollers and high-voltage loads. Designed for Arduino, Raspberry Pi, ESP32/ESP8266 and other controllers, it lets you switch lights, motors, pumps and appliances safely and reliably.

Key Features

• Control Voltage: 5V DC input compatible with most microcontroller boards
• Relay Type: SPDT (Single Pole Double Throw) with Normally Open (NO) and Normally Closed (NC) contacts
• Switching Capacity: Up to 10A at 250V AC or 10A at 30V DC for common household and industrial loads
• Optocoupler Isolation: Electrically isolates the control side from the load side to protect the controller from spikes and interference
• LED Indicator: Visual relay status feedback for troubleshooting and monitoring
• Screw Terminals: Secure, solder-free connections for quick installation
• Compact Form Factor: 52 mm x 26 mm x 18 mm with mounting holes for easy integration into enclosures

Electrical Specifications

• Control Voltage: 5V DC
• Input Signal: TTL compatible
• Contact Rating: 10A @ 250V AC / 10A @ 30V DC
• Relay Configuration: SPDT (COM, NO, NC)
• Isolation: Optocoupler on control input

Mechanical Specifications

• Board Size: 52 mm x 26 mm x 18 mm
• Mounting: 2 mounting holes included
• Terminals: 3 screw terminals for load and 3-pin header for control

Compatibility and Supported Controllers

Plug-and-play compatibility with popular controllers and development boards:

• Arduino Uno, Mega, Nano
• Raspberry Pi (any model)
• ESP8266, ESP32
• STM32, PIC, AVR and other microcontroller platforms

Applications

• Home automation: control lighting, fans, heaters and small appliances
• Industrial automation: drive pumps, solenoids and control circuits
• Automotive projects: custom electronics and auxiliary systems
• DIY electronics, robotics and prototyping

Wiring and Usage Tips

• Connect the module VCC to 5V and GND to ground on your controller. Drive the IN pin with a digital output (TTL).
• Use the COM/NO/NC screw terminals for the high-voltage load wiring. Ensure power is off while wiring.
• When switching inductive loads (motors, solenoids), add appropriate snubber diodes or RC circuits on the load side to reduce arcing and prolong relay life.
• Keep the control and load wiring separate and use short ground returns to minimize noise coupling.

Safety and Best Practices

• Always observe local electrical codes when wiring AC mains. If you are not qualified, consult a licensed electrician.
• Do not exceed the rated contact current and voltage. Use a higher-rated relay or contactor for heavy loads.
• Isolate the module during testing and place it in an enclosure for permanent installations to prevent accidental contact.
• Use fuses or circuit breakers on the load circuit for added protection.

Why Choose This Relay Module

This 1-channel relay module balances compact size with industrial-grade features. The optocoupler isolation and solid switching capacity make it suitable for both prototyping and long-term installations. The LED indicator and screw terminals speed up development and maintenance. It is an excellent choice for students, hobbyists, engineers and technicians.

Buy in Islamabad and Across Pakistan

Available at colgroad.com with local shipping to Islamabad and nationwide delivery across Pakistan. Pair this module with sensors, timers, or voice modules for a complete automation solution.

Order Now

Ready to add reliable switching to your project? Order the Relay Module (1-Channel) today from colgroad.com and get fast delivery and support.

Note:

Images are for illustration purposes only.