PC817 optical isolator photocoupler

The PC817 is an optocoupler or photocoupler that integrates an infrared LED and a phototransistor within a single package. It provides electrical isolation between input and output, making it ideal for isolating high-voltage circuits from low-voltage control systems. The PC817 is commonly used in power supply circuits, microcontroller interfaces, and signal isolation applications. Key Features:

• High isolation voltage: 5000 Vrms
• Compact 4-pin DIP package
• High collector-emitter voltage: 80V (max)
• Current transfer ratio (CTR): 50% to 600%
• Low input current: 1.2 mA (typical)
• Wide operating temperature range: -30°C to +100°C
• RoHS compliant

Technical Specifications:

• Input Forward Voltage (VF): 1.2V (typical)
• Input Current (IF): 20mA (max)
• Collector-Emitter Voltage (VCEO): 80V (max)
• Collector Current (IC): 50mA (max)
• Isolation Voltage: 5000 Vrms
• Current Transfer Ratio (CTR): 50% to 600%
• Response Time (Rise/Fall Time): 3µs (typical)
• Operating Temperature Range: -30°C to +100°C
• Package: 4-pin DIP

Applications:

• Power Supply Circuits: Isolates feedback signals in switching power supplies.
• Microcontroller Interfaces: Provides electrical isolation between microcontrollers and high-voltage circuits.
• Signal Isolation: Ensures signal integrity by isolating input and output signals in communication systems.
• Industrial Control: Used in industrial automation for isolating control signals.
• Consumer Electronics: Integrated into electronic devices to isolate and protect sensitive components.
• Telecommunications: Ensures reliable signal transfer in telecom equipment.