PC817 SMD OPTOCOUPLER SOP-4

The EL817 is an SMD optocoupler in a compact SOP-4 package, designed to transfer electrical signals between two isolated circuits through light. The device features an infrared LED on the input side and a phototransistor on the output, enabling signal coupling with high isolation and low power consumption. It is commonly used in switching power supplies, microcontroller interfacing, and isolation of high-voltage systems.

Key Features of EL817 SMD Optocoupler:

• • Isolation Voltage: Provides high isolation with a voltage rating of up to 5,000 Vrms.
  • Compact SOP-4 Package: Small footprint ideal for surface-mount applications.
  • Current Transfer Ratio (CTR): 50% to 600%, ensuring efficient signal transfer.
  • LED Forward Current: Operates at a low LED forward current of 20mA.
  • Output Type: NPN phototransistor output with high gain.

Technical Specifications of EL817 SMD Optocoupler:

• • Package: SOP-4
  • Isolation Voltage: 5,000 Vrms
  • Input LED Current: 20mA
  • CTR (Current Transfer Ratio): 50% to 600%
  • Operating Temperature: -55°C to +110°C
  • LED Forward Voltage: 1.2V to 1.4V
  • Output Collector-Emitter Voltage: 35V

Schematic Diagram, Connection, Wiring, and Pinout of EL817 SMD Optocoupler:

• Schematic Diagram: The schematic typically includes an LED on the input side connected to a current-limiting resistor, while the output connects to a pull-up resistor with the transistor output.
• Connection: The LED anode and cathode connect to the input side, and the collector and emitter to the output side, providing electrical isolation.
• Pinout:
  • Pin 1: Anode of the LED (Input)
  • Pin 2: Cathode of the LED (Input)
  • Pin 3: Emitter of the phototransistor (Output)
  • Pin 4: Collector of the phototransistor (Output)

Applications of EL817 SMD Optocoupler:

• • Switching Power Supplies: Used for isolation and feedback control.
  • Microcontroller Interfaces: Allows signal isolation between microcontrollers and high-voltage circuits.
  • Signal Isolation: Commonly used to isolate sensitive circuitry in industrial equipment.
  • Relay Drivers: Ideal for driving relays with isolation requirements.

Equivalent Models of EL817 SMD Optocoupler:

• • PC817: A similar optocoupler with comparable isolation and CTR range.
  • 4N35: An alternative optocoupler with DIP packaging and similar characteristics.

Keywords for EL817 SMD Optocoupler:

• • EL817 Optocoupler
  • SMD Isolation Device
  • Photo Transistor Coupler
  • SOP-4 Package Optocoupler
  • EL817 LED Opto-Isolator

Package Includes:

• • 1 x EL817 SMD Optocoupler SOP-4