The EL817-G is a series of four-pin phototransistor optocouplers from Everlight Electronics. It consists of an infrared emitting diode (IRED) optically coupled to a phototransistor. This device is designed for applications requiring electrical isolation between input and output circuits. It's available in various package configurations and offers high isolation voltage.

Applications

• Power supplies
• Industrial control systems
• Signal transmission between circuits with different ground potentials
• Noise suppression in digital circuits
• Microcontroller input isolation

Features

• High isolation voltage
• Current transfer ratio (CTR) options available
• Compact package
• Pb-free and RoHS compliant
• Various package types (DIP, SMD)

Benefits

• Provides electrical isolation for safety and noise immunity.
• Offers a flexible design choice by providing various CTR options.
• Saves board space due to its compact size.
• Environmentally friendly due to Pb-free and RoHS compliance.
• Suitable for a wide range of applications due to availability in different packages.

Additional Details

The EL817-G's key specifications include isolation voltage, current transfer ratio (CTR), forward current, and collector-emitter voltage. The CTR varies depending on the specific variant of the EL817-G. Detailed electrical and optical characteristics, including temperature dependencies and recommended operating conditions, can be found in the Everlight datasheet. Proper soldering techniques are essential for reliable performance, especially with surface-mount packages.