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EL817(C)-F - Everlight Electronics Co Ltd

EL817(C)-F 5kV Transistor Output Optocoupler 4-DIP Guide

Product Technical Guide EL817(C)-F Optocoupler GuideA structured overview of EL817(C)-F, including optical isolation characteristics, package information, pin configuration, specifications, application…

In Stock 2,831 Available Inventory
Part No.:
EL817(C)-F
Manufacturer:
Everlight Electronics Co Ltd
Package:
4-DIP (0.300", 7.62mm)
Datasheet:
EL817(C)-F.pdf
Description:
LINEAR IC
Quantity:
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EL817(C)-F 5kV Transistor Output Optocoupler 4-DIP Guide

Product Technical Guide
EL817(C)-F Optocoupler Guide

A structured overview of EL817(C)-F, including optical isolation characteristics, package information, pin configuration, specifications, applications, and replacement considerations.

Part Number EL817(C)-F
Manufacturer Everlight Electronics
Last Reviewed 2026-09-04
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01

Product Introduction

EL817(C)-F is a single-channel transistor-output optocoupler manufactured by Everlight Electronics. It uses an optical transmission path to electrically isolate the input and output sides of a circuit.

The device is specified for 5000Vrms isolation and uses a conventional 4-DIP package, making it suitable for isolated feedback, digital interface isolation, and power-control applications.

02

Key Benefits

Electrical Isolation

The optical isolation barrier separates the input and output circuits to help protect low-voltage control electronics.

Transistor Output

The transistor output can interface with digital control, feedback, and switching circuits.

5kVrms Isolation

The specified isolation rating supports applications requiring strong galvanic separation between circuit domains.

03

Features

  • Single-channel optocoupler
  • Transistor output
  • 5000Vrms isolation rating
  • 4-pin DIP package
  • Optical signal transmission
  • Suitable for feedback and control isolation
  • Commonly used in power supply and interface isolation circuits
04

Package

Package: 4-DIP

Mounting: Through Hole

Channels: 1

Output: Phototransistor

05

Pinout

Pin 1LED Anode
Pin 2LED Cathode
Pin 3Phototransistor Emitter
Pin 4Phototransistor Collector

Always verify the package orientation and exact pin assignment against the applicable Everlight datasheet.

06

Specifications

Parameter Value
Device Type Optocoupler / Optoisolator
Output Type Transistor
Number of Channels 1
Isolation Voltage 5000 Vrms
Package 4-DIP
Mounting Through Hole
Isolation Method Optical
07

Equivalent

Potential EL817-family replacements should be compared for CTR grade, isolation voltage, collector-emitter voltage, LED forward current, switching speed, temperature range, package dimensions, and pin assignment. A visually similar optocoupler is not necessarily a drop-in replacement.

08

Manufacturer

Everlight Electronics manufactures the EL817 family of phototransistor optocouplers for electrical isolation and signal-transfer applications.

09

Applications

Power Supply Feedback

Commonly used in isolated power supply feedback loops to transfer regulation information across an isolation barrier.

Control Isolation

Provides isolation between controller circuitry and higher-voltage or noisy circuit domains.

Digital Interface Isolation

Can isolate logic signals between electrically separated circuit sections.

Industrial Electronics

Suitable for control, monitoring, and interface isolation in industrial electronic equipment.

10

Disclaimer

The information provided on this page is for reference and product identification purposes only. Verify CTR grade, isolation voltage, package, pinout, operating temperature, and electrical limits against the latest manufacturer documentation before design or replacement.

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