4N33300

Overview

The onsemi 4N33300 is a single-channel photodarlington output optocoupler housed in a 6-pin DIP package. It features an isolation voltage of 5300 Vrms and supports a maximum collector-emitter voltage of 30 V with a peak collector current of 150 mA. The device operates within a temperature range of -55°C to +125°C, dissipating up to 250 mW. Key electrical parameters include a forward current of 80 mA, a forward voltage of 1.5 V, and a reverse voltage rating of 3 V.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits via optical coupling.
• Utilizes a photodarlington output structure to deliver high current transfer ratios for sensitive signal detection.
• Includes an integrated base terminal on the output transistor to allow for adjustable speed or sensitivity control.

Applications

• Industrial automation systems requiring galvanic isolation for control signals.
• Solid-state relay interfaces for switching AC or DC loads.
• Microcontroller input isolation to protect logic circuits from high-voltage transients.

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and performance variations. Confirm RoHS compliance status as manufacturing processes evolve. Check for obsolescence notices or lifecycle changes directly from onsemi documentation before finalizing procurement plans.

Selection Notes

Select this component when high isolation voltage and robust output drive capability are required. The photodarlington configuration offers higher gain than standard phototransistors but may exhibit slower switching speeds. Ensure the application timing requirements align with the device's rise and fall time specifications.

Part Context

This part belongs to the widely used 4N33 series of optocouplers, known for their reliability in general-purpose isolation applications. The 4N33300 variant specifically denotes a version with an exposed base pin on the output Darlington pair, offering additional design flexibility compared to standard variants without this feature.

Replacement Considerations

Direct substitutes include other 4N33 series variants such as the 4N33M or 4N333SD, provided the isolation voltage and package type match the design requirements. Verify that any replacement maintains the same pinout and electrical characteristics to ensure compatibility.