2pcs pc817 optocoupler

🔹 2pcs PC817 Optocoupler – EL817 / EL817C, DIP-4 Package

This pack contains two PC817 optocouplers (compatible with EL817 and EL817C), featuring an infrared LED and phototransistor in a compact DIP-4 package. They provide electrical isolation between input and output, making them ideal for signal isolation, microcontroller interfacing, and noise reduction in power supplies and industrial control circuits.

✅ Specifications:

• Part Number: PC817 / EL817 / EL817C

• Type: Optocoupler / Optoisolator

• Package: DIP-4 (through-hole)

• Input: Infrared LED (1.2V – 1.4V forward voltage)

• Output: Phototransistor

• Isolation Voltage: 5000V RMS (typical)

• Collector-Emitter Voltage (VCEO): 35V (max)

• Forward Current (IF): 50mA (max)

• Collector Current (IC): 50mA (max)

• CTR (Current Transfer Ratio): 50% – 600% (depends on grade)

• Operating Temperature: -55°C to +110°C

• Quantity: 2 Pieces

📦 Applications:
✔️ Microcontroller signal isolation
✔️ Switch-mode power supply (SMPS) feedback
✔️ Relay driver isolation
✔️ AC/DC voltage detection
✔️ Noise suppression in industrial controls
✔️ Arduino / ESP32 input protection
✔️ Logic level shifting (with external components)

⚠️ Important Note:

• Current limiting: Always use a current-limiting resistor (220Ω – 1kΩ) in series with the LED input to prevent damage.

• Output pull-up: The phototransistor output typically requires a pull-up resistor (10kΩ) for digital signals.