Sharp PC817 80V, 50mA Optocoupler

PC817 5 kVrms Isolation Photocoupler – 80 V, 50 mA Output, 4‑Pin DIP Package

The PC817 is a single-channel optocoupler integrating an infrared LED and a phototransistor for reliable electrical isolation between input and output circuits. It offers isolation voltage up to 5 kVrms and supports collector-emitter voltages up to 80 V with an output current of up to 50 mA. The device includes multiple Current Transfer Ratio (CTR) grades ranging from 50% to 600% at an input current of 5 mA and V_CE = 5 V.

Housed in a standard 4‑pin DIP package, the PC817 achieves up to 80 kHz cut‑off frequency and features rise/fall times of approximately 18 µs, supporting moderate-speed signal isolation IC. At an LED forward current of 20 mA, the input diode forward voltage is around 1.25 V. Operating temperature ranges from −30 ° C to +100 °C, with total power dissipation up to 200 mW under typical conditions.

Key Specs Voltage Rating: 80 V (V_CEO) Output Current: 50 mA max Isolation: 5 kVrms Current Transfer Ratio: 50%–600% @ IF = 5 mA Forward Voltage (LED): ~1.25 V @ 20 mA Cut-off Frequency: ~80 kHz Rise/Fall Time: ~18 µs Operating Temp: −30 °C to +100 °C Package: 4‑Pin DIP (through-hole) Technology: LED + Phototransistor Compliance: UL Recognized, RoHS-compliant

Applications include signal isolation in microcontroller interfaces, industrial control systems, AC/DC power control, and protection circuits.