SFH628A-3

The SFH628A-3 is an optocoupler, a device used to transfer electrical signals using light waves to provide electrical isolation between its input and output. It consists of a light-emitting diode (LED) and a phototransistor housed in a single package. The component is designed to ensure safety and functionality in applications where signal isolation is critical, such as in power supply circuits, microcontroller interfaces, and switching power supplies.
Key features of the SFH628A-3 include a high isolation voltage, typically around 5,000 Vrms, and a high current transfer ratio (CTR), which ensures efficient signal transfer across the isolation barrier. The device comes in a compact DIP-4 (Dual Inline Package) that facilitates easy integration into various electronic circuit boards. It's designed to operate over a wide range of voltages and temperatures, making it versatile for various applications.
The SFH628A-3 is particularly suitable for applications requiring reliable signal isolation and protection from high voltages or noisy environments, ensuring both device safety and performance integrity.

Equivalent products to the SFH628A-3 optocoupler include the PC817 by Sharp or Lite-On, 4N25 by Vishay, EL817 by Everlight, and LTV-817 by Lite-On. These components serve similar functions in isolating different sections of a circuit, typically featuring a phototransistor output and compatible input voltage ranges. Always verify specifications to ensure compatibility with your specific application.

The SFH628A-3 is an optocoupler device designed for isolation applications. Key features include:
1. Phototransistor Output: It integrates a phototransistor that receives infrared light from an LED, enabling signal transmission with electrical isolation.
2. High Isolation Voltage: The device offers a high isolation voltage, typically around 5000 VRMS, ensuring effective separation between input and output circuits.
3. CTR Range: The Current Transfer Ratio (CTR) is typically specified between 100% to 320%, ensuring reliable performance across various load conditions.
4. Compact Package: It is housed in a 4-pin DIP package, which saves space in circuit designs.
5. Wide Operating Temperature: The SFH628A-3 operates over a wide temperature range, typically from -55°C to +100°C, making it suitable for diverse environments.
6. Low Input Current: It requires a low input current for operation, enhancing its efficiency in applications where power consumption is a concern.
7. RoHS Compliant: The device is compliant with RoHS standards, indicating it is free from hazardous substances.
These features make the SFH628A-3 ideal for applications requiring electrical isolation with reliable signal transmission.

The SFH628A-3 is an optocoupler device typically used for isolating electrical circuits. It consists of a gallium arsenide infrared emitting diode and a silicon NPN phototransistor.
The SFH628A-3 comes in a 4-pin package, with the pin configuration and functions typically as follows:
1. Pin 1 (Anode): Connects to the positive side of the input current that powers the internal LED.
2. Pin 2 (Cathode): Connects to the negative side of the input current for the LED.
3. Pin 3 (Emitter): The emitter of the phototransistor on the output side. It is typically connected to the ground or the negative side of the output circuit.
4. Pin 4 (Collector): The collector of the phototransistor, usually connected to the positive voltage or the load in the output circuit.
The SFH628A-3 is commonly used for signal isolation and level shifting in various applications, providing electrical isolation between different parts of a circuit.

The SFH628A-3 is an optocoupler manufactured by Vishay Intertechnology, Inc. Vishay is a global company that specializes in the production of discrete semiconductors and passive electronic components. Founded in 1962 by Dr. Felix Zandman, the company has grown through various acquisitions and expansions to become a significant player in the electronics manufacturing sector. Vishay's product offerings include resistors, capacitors, inductors, diodes, and optoelectronic products, among others. Their components are used in a wide variety of industries, including automotive, industrial, consumer electronics, telecommunications, and medical sectors. The optocouplers, like the SFH628A-3, are utilized for isolating different sections of electronic circuits, providing signal transmission while maintaining electrical isolation.

The SFH628A-3 is an optocoupler used for electrical isolation in various applications. Key areas include:
1. Power Supplies: It isolates control circuits from high-voltage sections to ensure safety and reliability.
2. Microcontroller Interfaces: Provides isolation between microcontrollers and high-voltage components.
3. Industrial Automation: Used in control systems to isolate different sections and prevent interference.
4. Signal Isolation: Helps in isolating low-level signals from high-power components in communication systems.
5. Switching Power Supplies: Ensures safe operation by separating the primary and secondary sides.
Its applications are widespread in circuits requiring isolation to prevent electrical noise interference and ensure user safety.

The SFH628A-3 is a phototransistor optocoupler, and it typically comes in a 4-pin dual in-line package (DIP).