PS2811-1-F3-A

The CEL PS2811-1-F3-A is an optocoupler, also known as an opto-isolator, designed to provide electrical isolation between different parts of a circuit while allowing signal transmission. This device is particularly useful in applications where it is necessary to separate high-voltage circuits from low-voltage control circuits, ensuring safety and protecting sensitive components from voltage spikes and noise.

### Overview of PS2811-1-F3-A

The PS2811-1-F3-A is a single-channel optocoupler that features a phototransistor output. It is designed to operate with a wide range of input and output conditions, making it suitable for various applications in industrial automation, telecommunications, and consumer electronics. The device is known for its high-speed performance, reliability, and compact package.

### Key Specifications

1. Input Structure: The PS2811-1-F3-A consists of an infrared LED (light-emitting diode) as the input element. When a current flows through the LED, it emits infrared light, which is detected by the phototransistor on the output side.

2. Output Structure: The output of the PS2811-1-F3-A is a phototransistor that can switch on and off in response to the infrared light from the LED. This allows for the transmission of signals while maintaining electrical isolation.

3. Isolation Voltage: The device provides a high isolation voltage of up to 5000 Vrms. This high level of isolation is crucial for protecting sensitive components and ensuring safety in high-voltage applications.

4. Input Current: The recommended input current for the LED is typically around 10 mA to 20 mA. This current range ensures reliable operation and optimal performance of the optocoupler.

5. Output Current: The PS2811-1-F3-A can handle a maximum output current of 50 mA. This capability allows it to drive various loads, including relays and other control devices.

6. Collector-Emitter Voltage: The maximum collector-emitter voltage (V_CE) for the phototransistor is typically 30 V. This specification indicates the maximum voltage that can be applied across the output without damaging the device.

7. Switching Speed: The PS2811-1-F3-A features a fast switching speed, with a rise time of approximately 10 µs and a fall time of around 5 µs. This fast response time makes it suitable for high-speed applications.

8. Temperature Range: The device operates over a wide temperature range, typically from -40°C to +100°C. This wide operating range makes it suitable for use in various environmental conditions, including industrial applications.

9. Package Type: The PS2811-1-F3-A is available in a compact DIP-4 (Dual In-line Package) configuration, which is suitable for through-hole mounting. This small footprint allows for easy integration into printed circuit boards (PCBs).

10. CTR (Current Transfer Ratio): The current transfer ratio of the PS2811-1-F3-A is typically in the range of 50% to 600%. This ratio indicates the efficiency of the optocoupler in transferring input current to output current, which is essential for ensuring signal integrity.

### Applications

The CEL PS2811-1-F3-A is suitable for a wide range of applications, including:

- Signal Isolation: Used in control circuits to isolate high-voltage signals from low-voltage control systems, ensuring safety and protecting sensitive components.
- Data Communication: Ideal for transmitting data signals in telecommunications and networking equipment, where electrical isolation is required.
- Industrial Automation: Employed in industrial control systems to interface sensors and actuators while providing electrical isolation.
- Power Supply Circuits: Used in switch-mode power supplies (SMPS) for feedback control and isolation between the primary and secondary sides.

### Conclusion

The CEL PS2811-1-F3-A is a reliable and efficient optocoupler that meets the demands of various electronic applications. With its high isolation voltage, fast switching speed, and wide operating temperature range, it provides a robust solution for designers looking to implement electrical isolation in their circuits. For detailed specifications, application notes, and design guidelines, it is recommended to refer to the official CEL datasheet for the PS2811-1-F3-A.