PC817 Photocoupler 80V 50mA IC DIP-4

Description

PC817 Photocoupler 80V 50mA IC DIP-4 The PC817 is a general-purpose optocoupler that contains an infrared LED optically coupled to a phototransistor in a 4-pin package. It provides galvanic isolation between input and output, allowing digital or analog signals to be transferred while protecting low-voltage logic from high voltages, ground loops, or electrical noise. The family includes through-hole DIP, wide-lead, and SMT gullwing lead-forms and offers several CTR ranks so designers can select parts for different gain/drive conditions. Because the device uses a transistor output stage it is ideal for I/O isolation, noise suppression in switching circuits, and signal level translation between different potentials or impedances. The PC817 is UL-recognized for isolation (UL1577) and specified with high input-to-output isolation (5.0kVrms), moderate speed (µs-range response), and broad temperature/storage ratings—making it suitable for general industrial, consumer, and communications equipment. Features: Optically coupled LED → phototransistor design. 4-pin package (DIP and SMT options). Multiple CTR (current transfer ratio) ranks available. High input-to-output isolation (UL recognized). Low-profile packages and wide-lead options for through-hole and SMT assembly. Specifications: Specification Value Forward Voltage (VF): 1.2V, Max. 1.4V Reverse Voltage (VR): Max. 6V Forward Current (IF): Max. 50mA Peak Forward Current (IFM): 1A (pulse) Collector-Emitter Voltage (VCEO): 80V Emitter-Collector Voltage (VECO): 6V Collector Current (IC): Max. 50mA Collector Power Dissipation: 150mW Total Power Dissipation: 200mW Isolation Voltage (Input–Output); 5.0kVrms Cut-off Frequency: 80kHz Rise Time: 4µs Fall Time: 3µs Operating Temperature Range: −30°C to +100°C Storage Temperature Range: −55°C to +125°C Soldering Temperature (Peak): 260°C (leads), 250°C (package surface) Pinout: Pin Number Function Pin 1 Anode (Infrared LED) Pin 2 Cathode (Infrared LED) Pin 3 Emitter (Phototransistor) Pin 4 Collector (Phototransistor) Footprint: Applications: I/O isolation for microcontrollers and logic interfaces. Noise suppression/isolation in switching power circuits. Signal transmission between circuits at different potentials or impedances. Line receiver isolation, relay drive isolation, and general industrial control interfaces. Packages: 1x PC817 Photocoupler 80V 50mA IC DIP-4. Documents: PC817 IC Datasheet.

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