Skip to Content

Optocoupler 4N35 DIP

The 4N35 Optocoupler IC is a widely used opto-isolator designed to provide electrical isolation between input and output circuits while allowing signal transmission through an internal infrared LED and phototransistor. By transferring signals optically rather than electrically, the 4N35 helps protect sensitive electronic components from voltage spikes, electrical noise, and ground loop issues, making it an essential component in industrial, automation, and embedded control applications.

 

Package Includes:

  • 1 x 4N35 Optocoupler IC


8.00 AED 8.00 AED (Tax included)

Terms and Conditions
30-day money-back guarantee
Shipping: 2-3 Business Days

 

Features:

  • Electrical Isolation: Provides galvanic isolation between input and output circuits.
  • Infrared LED Input: Internal IR LED enables optical signal transmission.
  • Phototransistor Output: Integrated NPN phototransistor for signal switching and interfacing.
  • Noise Immunity: Helps eliminate ground loops and electrical interference.
  • Compact Package: Standard 6-pin DIP package suitable for breadboards and PCBs.
  • Microcontroller Compatible: Ideal for Arduino, Raspberry Pi, STM32, ESP32, and other control systems.
  • Reliable Performance: Designed for long-term operation in industrial and commercial applications.
  • Wide Application Range: Suitable for power supplies, industrial controls, and communication interfaces.

Specifications:

  • Model: 4N35
  • Device Type: Optocoupler / Opto-Isolator
  • Output Type: NPN Phototransistor
  • Package Type: DIP-6
  • Isolation Voltage: Up to 5000V RMS
  • Input LED Forward Voltage: Typically 1.2V
  • Collector-Emitter Voltage: Up to 70V
  • Current Transfer Ratio (CTR): Typically 100% at specified test conditions
  • Operating Temperature: -55°C to +100°C
  • Mounting Type: Through-Hole

Pin Configuration:

4N35 Optocoupler IC

  • Pin 1: Anode (LED +)
  • Pin 2: Cathode (LED -)
  • Pin 3: Not Connected (NC)
  • Pin 4: Emitter
  • Pin 5: Collector
  • Pin 6: Base

How to Use:

How to Build an Optocoupler Circuit

  1. Connect the input signal through a suitable current-limiting resistor to Pin 1 (Anode).
  2. Connect Pin 2 (Cathode) to the input circuit ground.
  3. Connect the output circuit to the Collector (Pin 5) and Emitter (Pin 4).
  4. Apply the input signal to activate the internal LED.
  5. The phototransistor output will switch accordingly while maintaining electrical isolation.


Applications:

  • Microcontroller isolation
  • Industrial automation systems
  • PLC input and output interfaces
  • Switching power supply feedback circuits
  • Motor control systems
  • Signal isolation circuits
  • Communication interfaces
  • Voltage level isolation
  • Embedded electronics projects

Notes:

  • Always use a current-limiting resistor with the input LED.
  • Verify output current requirements when designing switching circuits.
  • Isolation performance depends on proper PCB layout and spacing.
  • Refer to the manufacturer's datasheet for detailed electrical characteristics.