4N283S

Overview

The onsemi 4N283S is a general-purpose optocoupler featuring a gallium arsenide infrared emitting diode coupled to a silicon phototransistor with a base terminal. It provides electrical isolation of 5300 Vrms between input and output circuits. The device is housed in a 6-SMD, Gull Wing package designed for surface-mount applications. This configuration supports signal transmission across isolated barriers while maintaining high reliability and low power consumption characteristics typical of standard transistor-output optoisolators.

Feature Summary

• Integrates an infrared LED driver with a silicon phototransistor output stage
• Provides high voltage isolation capability between input and output terminals
• Includes a base terminal on the phototransistor for improved switching speed control

Applications

• General purpose signal isolation in industrial control systems
• Interface circuits for microprocessor-based logic systems
• Switching power supply feedback loops

Procurement Notes

Verify the specific suffix 'S' indicates the surface-mount Gull Wing package variant distinct from through-hole versions. Confirm RoHS compliance status as lead-free where applicable. Ensure the supplier provides official datasheets matching the 4N283S part number to avoid confusion with similar 4N28 series components that may differ in packaging or isolation ratings.

Selection Notes

Select this component when surface-mount assembly is required for general-purpose isolation tasks. The presence of a base terminal allows for external resistance adjustment to optimize turn-off time compared to base-less variants. Verify that the 5300 Vrms isolation rating meets the safety requirements of the target application environment and regulatory standards.

Part Context

This component belongs to the widely used 4N28 family of optocouplers manufactured by onsemi. The 4N28 series is a standard solution for basic galvanic isolation needs. The 4N283S specifically denotes the surface-mount version, offering space-saving advantages over traditional dual-in-line packages while maintaining equivalent electrical performance characteristics for general electronic designs.

Replacement Considerations

Direct pin-compatible replacements within the same package include other 4N28 series surface-mount variants such as the 4N28SR2VM if base terminal availability is not critical. Cross-reference isolation voltages and CTR ranges carefully when substituting with generic equivalents from other manufacturers.