5V Single-Channel Relay Module with Optocoupler – KSH 150 at HIMA TRONICS Mombasa – Top quality relays. Best electronics in Kenya. Shop now for Arduino, ESP32, sensors and IoT devices.
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5V Single-Channel Relay Module with Optocoupler

SKU: HMJ076 Category: Relays
KSH 150.00
In Stock
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Product Description

5V Single-Channel Relay Module with Optocoupler

= High-Power Switching Module for Microcontroller Control =

This singlechannel relay module enables a microcontroller to independently control one highpower device such as lights, motors, and solenoids. It provides complete electrical isolation between the lowvoltage control circuit and the highpower load circuit, protecting your microcontroller.

Controls 1 AC/DC Load - Switch up to 250V AC @ 10A or 30V DC @ 10A
Optocoupler Isolation Provides excellent antiinterference and protects the control circuit
Operating voltage is 5V DC with each channel requiring 5mA trigger current
Total module operating current is approximately 190mA when the relay is active
The module can be set to active HIGH or active LOW via a jumper on some versions

= Technical Specifications =

ParameterValue
Operating Voltage5V DC
Trigger Current5mA
Active Current~190mA
Maximum Load (AC)250V @ 10A
Maximum Load (DC)30V @ 10A
IsolationOptocoupler
Dimensions~50mm x 26mm

= Pin Configuration =

Input Pins (Control Side):

  • VCC: 5V DC power supply
  • GND: Ground connection
  • IN: Control pin for the relay (LOW or HIGH trigger)

Output Terminals (Load Side):

  • COM: Common terminal
  • NO (Normally Open): Load connects here when relay is activated
  • NC (Normally Closed): Load connects here when relay is deactivated
On many modules, a LOW signal (0V) on IN activates the relay
Some modules have a jumper to select high or low trigger

= Applications =

  1. Home automation (lights, fans, appliances)
  2. Industrial control systems
  3. Robotics and IoT projects
  4. Security systems (alarms, locks)
Versatile Control Manage highpower devices with microcontroller logic
Wide Compatibility - Works with Arduino, ESP32, Raspberry Pi, and other microcontrollers

√ Each relay has an independent LED status indicator for monitoring

√ Standard screw terminals for easy load wiring

√ Includes flyback diode for protection against voltage spikes

= Troubleshooting =

Relay not activating:

  • Ensure the module is powered with a stable 5V DC supply
  • Check if your module is active LOW or HIGH using a multimeter
  • Verify signal logic matches the module's configuration

Load not switching:

  • Verify wiring to NO/NC and COM terminals
  • Ensure load does not exceed 250V AC @ 10A or 30V DC @ 10A rating

Arduino resets or module behaves erratically:

  • Use an external 5V power supply for the relay module
  • The Arduino's 5V pin may not supply sufficient current for reliable operation