4N25S

Part points

• The 4N25S is an optoisolator chip that consists of an infrared LED and a phototransistor. It is commonly used to transfer electrical signals between two circuits while providing electrical isolation. When the LED receives a current, it emits infrared light which is then detected by the phototransistor, producing a proportional electrical output. The 4N25S chip is often used for interfacing low-level signals, noise reduction, and preventing ground loops.

• Equivalent

  Some equivalent products of the 4N25S chip include the PC827, EL817, and TLP621-4. These chips are optocouplers that provide similar functionality and performance.

• Features

  The 4N25S is an optoisolator with a transistor output. It has a forward voltage of 1.2V, a collector-emitter voltage of 30V, and a current transfer ratio of 20%. The device is known for its high isolation voltage of 5000V RMS and its wide operating temperature range of -55°C to +100°C.

• Pinout

  The 4N25S is an optoisolator with a pin count of 6. Its pins include 2 inputs (anode and cathode), 1 output (collector), 2 auxiliary/bypass pins (emitter and base), and 1 shield pin (not connected to any internal components). It is typically used to provide electrical isolation between input and output circuits in electronic systems.

• Manufacturer

  The manufacturer of the 4N25S is Fairchild Semiconductor, an American semiconductor manufacturing company.

• Application Field

  The 4N25S is used in various applications such as motor control, industrial controls, robotics, power supplies, telecommunication equipment, and audio equipment.

• Package

  The 4N25S chip is packaged in a 6-pin DIP (Dual In-line Package) form. It has a small size, typically measuring around 9.15 mm in length and 7.62 mm in width, making it suitable for various electronic applications.