2 Channel 5V Relay Module with Optocoupler

The 2 Channel 5V Relay Module with Optocoupler is a dual-channel isolated relay board that accepts logic input between 3.3V and 5V — making it directly compatible with both 5V Arduino boards and 3.3V boards such as ESP32, ESP8266, and NodeMCU without any level shifting — and switches up to 10A at 250VAC and 10A at 30VDC per channel with optocoupler isolation protecting the microcontroller on each channel. This 2 channel relay module uses a low-level trigger, so each relay activates when its signal pin is pulled LOW, and the optocoupler on each channel ensures the ESP32 or Arduino GPIO has no direct electrical connection to the relay coil or load circuit.

The two channel relay module’s 3.3V-5V logic compatibility is the key practical advantage over relay modules with a fixed 5V-only trigger input — ESP32 and NodeMCU GPIO pins output 3.3V, which is insufficient to reliably trigger 5V-only relay modules, whereas this 5v relay module for arduino reliably activates from 3.3V signals. Available from StemVolt, offering quality electronics parts at competitive prices. This relay module with optocoupler is ideal for ESP32 NodeMCU Arduino dual-load isolated relay switching project builds in India.

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Features:

• 3.3V to 5V logic — works with ESP32 NodeMCU and Arduino directly
• Optocoupler per channel isolates MCU from relay and load circuit
• Low-level trigger activates relay when signal pin pulled LOW
• 10A at 250VAC per channel for dual-load appliance switching
• Two independent channels for separate simultaneous load control

Technical Specifications:

Applications:

• ESP32 IoT dual relay switching two loads from 3.3V GPIO
• India maker controls two appliances via NodeMCU 2 channel relay
• STEM project for 2 channel relay module optocoupler dual-load demo
• Arduino dual relay build with isolated optocoupler protection per channel
• College 5v relay module for arduino for dual relay isolation lab

Package Includes:

• 1 x 2 Channel 5V Relay Module with Optocoupler