The EL817S1(A)(TU)-F is a single-channel phototransistor optocoupler manufactured by Everlight Electronics Co. Ltd. It is designed to provide electrical isolation between circuits, safeguarding sensitive components from high voltage and electrical noise. The device comprises an infrared LED and a phototransistor, which are optically coupled.

Applications

• Switch Mode Power Supplies (SMPS): For feedback control and isolation between primary and secondary circuits.
• Programmable Logic Controllers (PLCs): To isolate input/output modules from the control logic.
• Inverter Circuits: Providing isolation and control signals in inverter applications.
• Data Communication Systems: Isolating data lines to prevent ground loops and improve signal integrity.
• Motor Control Circuits: Isolating control signals for motor drivers.

Features

• High Isolation Voltage: Withstands high voltage between input and output, ensuring safety and preventing electrical hazards (typically 5000 Vrms).
• Compact SMD Package: Space-saving design suitable for high-density PCB assembly.
• Current Transfer Ratio (CTR): The CTR rank (A) specifies the range of current transfer efficiency, ensuring optimal performance in different circuit configurations.
• Low Saturation Voltage: Enhances switching speed and reduces power dissipation.
• RoHS Compliant: Environmentally friendly, adhering to Restriction of Hazardous Substances directives.

Benefits

• Enhanced Safety: Offers a high level of electrical isolation, protecting equipment and personnel.
• Improved System Reliability: Prevents noise and voltage transients from affecting sensitive circuitry.
• Simplified Circuit Design: Reduces the complexity of isolation circuits and lowers component count.
• Increased Performance: Improves signal integrity and reduces signal distortion.
• Cost-Effective Isolation Solution: Provides a reliable and affordable isolation alternative.

Additional Details

The EL817S1(A)(TU)-F is available in a surface-mount package, making it suitable for automated assembly processes. It operates within a broad temperature range, typically from -30°C to +110°C, making it suitable for various industrial and commercial applications. The "-F" suffix usually indicates lead-free compliance.

The (A) in the part number specifies the Current Transfer Ratio (CTR) ranking. Consult the manufacturer's datasheet for the precise CTR range associated with the (A) rank, as this is essential for selecting the correct optocoupler for a given application. Always refer to the official datasheet for comprehensive specifications, including isolation voltage, CTR, and operating temperature range.