The FOD814A300/PC814A is a general-purpose single-channel phototransistor optocoupler. Manufactured by Fairchild (now ON Semiconductor), it consists of an infrared emitting diode (IRED) optically coupled to a phototransistor. This optocoupler is designed for electrical isolation between input and output circuits, providing protection against high voltage transients and noise.

Applications

• Industrial control systems
• Signal isolation
• Power supply feedback control
• Motor control
• Digital logic input isolation

Features

• High isolation voltage: Provides electrical isolation up to several kilovolts.
• Current transfer ratio (CTR): Offers a specified range of current transfer ratio between input and output.
• Compact package: Available in a standard DIP or surface mount package.
• RoHS compliant: Complies with Restriction of Hazardous Substances directive.
• UL and VDE certifications: Meets safety standards for various applications.

Benefits

• Electrical isolation: Protects sensitive circuits from high voltage and noise.
• Improved system reliability: Reduces the risk of ground loops and common-mode noise.
• Simplified circuit design: Eliminates the need for complex isolation techniques.
• Safety compliance: Meets industry safety standards for isolation.
• Versatile applications: Suitable for a wide range of industrial and commercial applications.

Additional Details

The FOD814A300/PC814A optocoupler typically operates from a 5V power supply. The forward current of the IRED should be limited to the specified maximum value to prevent damage. The collector-emitter voltage of the phototransistor should also be within the specified limits. The optocoupler provides a cost-effective solution for electrical isolation in various electronic circuits. The current transfer ratio (CTR) is an important parameter to consider when designing circuits using optocouplers. The FOD814A300 variant often indicates a specific CTR range or testing condition. This device helps ensure safety and reliability in applications where electrical isolation is crucial.