4N28FVM

Overview

The 4N28FVM is a high-speed optocoupler manufactured by onsemi, featuring an infrared LED coupled to a phototransistor output. It provides electrical isolation with a rated voltage of 7.5 kV. The device utilizes a surface-mount package design suitable for automated assembly processes. This component is engineered to transmit digital signals across isolated circuits while maintaining signal integrity and noise immunity in demanding electronic environments.

Feature Summary

• Provides robust electrical isolation between input and output circuits
• Features high switching speed for efficient signal transmission
• Designed for reliable operation in industrial and commercial applications

Applications

• Industrial control systems
• Communication equipment
• Power supply feedback loops

Procurement Notes

Verify the specific suffix 'FVM' against official datasheets to confirm tape-and-reel packaging specifications and lead frame plating requirements. Ensure compatibility with reflow soldering profiles defined by the manufacturer. Cross-reference part numbers with authorized distributors to avoid counterfeit components. Confirm that the 7.5 kV isolation rating meets the safety standards required for your specific circuit design.

Selection Notes

Select this component when high-speed digital isolation is required in space-constrained designs. The surface-mount form factor facilitates automated PCB assembly. Consider the 7.5 kV isolation capability for applications requiring significant potential difference between circuits. Evaluate thermal management needs based on the forward current of the internal LED. Ensure the phototransistor output characteristics match the load requirements of the receiving circuitry.

Part Context

This device belongs to the family of optoelectronic isolators produced by onsemi. These components are critical for protecting sensitive electronics from voltage spikes and ground loops. The 4N28 series is widely recognized for its balance of performance and reliability in various power management and signal processing applications.

Replacement Considerations

Check for direct pin-compatible alternatives within the same isolation voltage class. Verify that any substitute maintains the same switching speed and current transfer ratio. Ensure the replacement package matches the footprint and thermal characteristics of the original component.