SMD Optocoupler PC817C EL817 SOP-4

PC817 SMD Optocoupler SOP-4 is a highly reliable and widely utilized component that provides essential galvanic isolation between two electrical circuits, preventing high-voltage surges or noise from transferring from one side to the other. This device integrates an infrared light-emitting diode (LED) optically coupled to a silicon NPN phototransistor, encapsulated within a space-saving SOP-4 surface-mount package. The PC817 enables low-voltage digital circuits, like microcontrollers, to safely drive or sense signals from high-voltage, noisy, or ground-isolated systems, effectively breaking ground loops and protecting sensitive electronics. Therefore, designers frequently select the PC817 SMD version for compact and high-density PCB layouts found in modern switching power supplies and industrial control boards. 

Key Features: 
• High Isolation Voltage: Provides excellent insulation characteristics, typically offering a minimum isolation voltage of 5000 VRMS, which safeguards connected control systems.

• Compact SOP-4 Package: The Surface-Mount Device (SMD) packaging minimizes board footprint, making it perfect for high-density electronic products and automated assembly.

• Standard CTR Performance: The device features a standard Current Transfer Ratio (CTR) range, ensuring broad compatibility and consistent signal coupling across different operating conditions.

• Fast Switching Speed: Offers sufficient switching characteristics for many common DC-to-DC conversion and digital interfacing applications.

• High Voltage Protection: Effectively isolates low-voltage logic from mains electricity or high-power switching circuits. 

Technical Specifications: 
• Output Type: Phototransistor (NPN)

• Number of Channels: 1

• Isolation Voltage (V1s0): 5000 VRMS (minimum)

• Collector-Emitter Voltage (4E0): 35 V (Maximum)

• Collector Current (Is): 50 mA (Maximum)

• Input LED Forward Current (IF): 50 mA (Maximum)

• Current Transfer Ratio (CTR): 50% to 600% (IF = 5mA, Vice = 5V)

• Operating Temperature Range: -30°C to +100°C