The H11A817A3S is a versatile optocoupler device from ON Semiconductor, designed to provide electrical isolation between its input and output circuits through an optically coupled isolator. This high-performance product is a solid-state alternative to traditional electromechanical relays, ensuring improved reliability and longer service life.

Key Features

• High Isolation Voltage: The device offers a high isolation voltage of 5000 Vrms, which makes it suitable for applications requiring stringent electrical isolation between the input and output.
• Current Transfer Ratio (CTR): With a CTR range of 50% to 600% at an input current of 5 mA, the H11A817A3S provides a stable signal transfer from the input LED to the output phototransistor.
• Input-Output Insulation: The optocoupler features a phototransistor optically coupled to a gallium arsenide infrared emitting diode, ensuring excellent insulation characteristics.
• Package: Enclosed in a compact 4-pin DIP package, it is suitable for PCB mounting and occupies minimal board space.
• Temperature Range: It operates over a wide temperature range from -55°C to +100°C, accommodating various industrial environments.
• Lead-Free and RoHS Compliant: The device is lead-free and compliant with RoHS standards, making it an environmentally friendly choice for modern electronic applications.

Applications

The H11A817A3S optocoupler is ideal for a variety of applications that require good isolation properties, such as:

• Signal transmission between systems of different potentials and impedances
• Isolation in power supplies, telecommunication equipment, and motor control circuits
• Switching power supplies and battery chargers
• Computer peripheral interfacing
• AC mains detection and solid-state relays

Conclusion

With its robust design, high isolation voltage, and wide operating temperature range, the ON Semiconductor H11A817A3S optocoupler is a reliable solution for designers looking to enhance the safety and efficiency of their electronic systems. Its compliance with environmental standards further ensures its suitability for a wide range of modern applications.