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Key Features:

• Built-in infrared LED and phototransistor pair

• Provides electrical isolation between input and output

• Ideal for microcontroller signal isolation, relay driving, and zero-cross detection

• Compact DIP-6 package for easy PCB mounting

• Compatible with Arduino, Raspberry Pi, and STM32 boards

• Fast switching and high reliability

Product Description (Detailed):

The MCT2E Optocoupler IC is a photo-isolator designed to transfer digital signals across an isolation barrier using infrared light. It contains an IR LED optically coupled to a phototransistor housed in a standard 6-pin DIP package.

This IC is widely used to protect microcontrollers from high-voltage or noisy circuits, such as switching relays, AC line detection, or industrial controllers. It’s ideal for Arduino and embedded system projects where safety and signal isolation are required.

The MCT2E enables safe communication between two circuits without a direct electrical connection, reducing the risk of component damage due to ground loops or voltage spikes.

Technical Specifications:

How to Use:

1. Connect the anode and cathode of the internal LED (pins 1 and 2) to your low-voltage digital circuit (e.g., Arduino pin through a resistor).

2. Connect the collector and emitter (pins 4 and 5) to the external high-voltage side or load, using pull-up or base biasing as needed.

3. Ensure the LED side and transistor side are completely electrically isolated.

Example: Use MCT2E to switch a transistor/relay on the AC side while keeping your microcontroller safe.

Applications:

• Digital signal isolation in embedded systems

• Switching circuits and relay drivers

• Zero-cross detection in AC circuits

• Industrial automation and control systems

• Arduino and Raspberry Pi GPIO protection

• Noise isolation between logic levels and power electronics

Package Includes:

• 1× MCT2E Optocoupler IC (DIP-6)