The EL817S1(C)(TU)-FV is a surface-mount phototransistor optocoupler manufactured by Everlight Electronics Co Ltd. This device integrates an infrared-emitting diode (IRED) and a phototransistor within a compact SMD package, providing electrical isolation between the input and output circuits. It is designed for applications requiring signal transfer and isolation in a small form factor.

Applications

• Industrial Control Systems: Isolation of I/O signals in industrial automation equipment.
• Power Supplies: Feedback control and isolation in switching power supplies and converters.
• Telecommunications: Signal isolation in telephone and networking equipment.
• Consumer Electronics: Isolation in appliances, TVs, and other consumer devices.
• Medical Equipment: Ensuring patient safety through electrical isolation in medical devices.

Features

• Surface Mount Device (SMD): Facilitates automated assembly and reduces board space.
• High Isolation Voltage: Provides electrical isolation up to 5000 Vrms.
• Current Transfer Ratio (CTR): Specified CTR ensures efficient signal transfer. The '(C)' designates a specific CTR range.
• Low Saturation Voltage: Minimizes voltage drop for improved performance.
• High Collector-Emitter Voltage: Suitable for a range of voltage applications.
• RoHS Compliant: Complies with environmental regulations.

Benefits

• Electrical Isolation: Protects sensitive circuits from voltage spikes and ground loops.
• Compact Size: Enables high-density designs.
• Improved Noise Immunity: Reduces the effects of electrical noise on signal integrity.
• Simplified Circuit Design: Eases interfacing between circuits with different voltage levels.
• Enhanced System Reliability: Isolates potential fault sources, improving overall system robustness.

Additional Details

The EL817S1 series is offered with different CTR grades, and the (C) in the part number indicates a specific CTR range. The (TU) signifies tape and reel packaging for automated pick-and-place assembly. The -FV suffix likely indicates a specific lead finish or other manufacturing variation. Typical operating temperature ranges from -30°C to +110°C. The forward voltage of the input LED is approximately 1.2V. Refer to the manufacturer's datasheet for detailed specifications, including CTR values, pinout information, soldering guidelines, and other critical parameters to ensure proper device operation. Always prioritize the official datasheet for design and application information.