The EL3H7 is a high-gain, high isolation voltage optocoupler manufactured by Everlight Electronics Co., Ltd. It consists of an infrared emitting diode optically coupled to a silicon phototransistor. This configuration allows for electrical isolation between the input and output circuits.

Applications:

• Power supplies
• Industrial control systems
• Digital logic inputs
• Microprocessor input/output isolation
• Noise isolation in signal transmission

Features:

• High isolation voltage (typically 5000 Vrms)
• High current transfer ratio (CTR)
• Low saturation voltage
• Compact package
• Pb free and RoHS compliant

Benefits:

• Provides electrical isolation, protecting sensitive circuits from high voltages or noise.
• Enables reliable signal transmission with minimal signal degradation.
• Reduces ground loops and improves system stability.
• Offers a cost-effective solution for isolation applications.
• Suitable for a wide range of operating temperatures.

Additional Details:

The EL3H7's high isolation voltage is a key characteristic, making it suitable for applications where safety and reliability are critical. The current transfer ratio (CTR) is a measure of the efficiency of the optocoupler, indicating the ratio of output current to input current. A higher CTR means less input current is required to achieve a desired output current. The low saturation voltage of the output transistor ensures efficient switching performance. The EL3H7 is commonly used in applications where a digital signal needs to be transmitted across an isolation barrier, such as in power supplies or industrial control equipment. Always refer to the datasheet for precise electrical characteristics, such as CTR ranges, forward voltage, and collector-emitter breakdown voltage, as they can vary between different production lots.