12V 8 Channel Relay Module with Optocoupler

The 12V 8 Channel Relay Module with Optocoupler is a large-scale relay board that provides eight independently controlled relay channels on one board, each rated at 10A at 250V AC and optocoupler isolated — making it the right module for home automation systems, industrial sequence controllers, and Arduino Mega or ESP32 multi-output builds where multiple separate loads need to be switched from a single microcontroller without using multiple smaller relay boards. This 12v relay module 8 channel accepts a 12V DC supply and control signals from either 5V or 12V logic, covering the full range of common microcontroller output voltages so it works with both 5V Arduino boards and 3.3V/5V compatible ESP-based controllers using the same board without hardware changes.

The arduino compatible 12v 8 channel relay module uses a low-level trigger on each channel — each relay activates when its signal input is pulled LOW — and each channel has its own optocoupler isolation component on the board, maintaining full galvanic separation between the microcontroller signal lines and the 250VAC load switching contacts on all eight channels simultaneously. The 8 channel relay module’s low-level trigger design means that all eight relays can be connected to eight separate GPIO pins on an Arduino Mega, ESP32, or any multi-output microcontroller and individually switched on or off in any sequence or pattern through code.

The optocoupler relay module’s eight independent load terminals allow eight completely separate circuits to be wired — lights, fans, motors, pumps, solenoids, or any 250VAC/10A appliance — each controlled by one digital output pin. The 12v 8 channel relay board’s common 12V supply and ground connection simplifies wiring compared to connecting eight separate relay modules. Available from StemVolt, offering quality electronics parts at competitive prices. This relay module is ideal for Arduino Mega home automation and multi-output industrial switching builds in India.

Related Product:

• Checkout 4 Channel 5V 10A Relay Module with optocoupler

• 8 independent optocoupler-isolated channels on one compact relay board
• 5V and 12V trigger compatible — works with Arduino and ESP boards
• Low-level trigger — each channel activates when signal pulled LOW
• 250VAC/10A per channel for lights fans motors and appliance switching
• Single 12V supply powers all 8 channels with shared ground

Technical Specifications:

Applications:

• Arduino Mega 8-output home automation controller for lights and fans
• Builds 8-zone irrigation controller with 8 channel relay
• For 8 channel relay module multi-output switching demo
• Arduino compatible 8 channel relay for PLC simulation lab

Package Includes:

• 1 x 12V 8 Channel Relay Module with Optocoupler