4N33M

Overview

The onsemi 4N33M is a single-channel transistor output optocoupler featuring a photodarlington configuration. It provides an isolation voltage of 4170 Vrms and operates within a temperature range of -40°C to +100°C. Key electrical parameters include a maximum collector-emitter voltage of 30 V, a maximum collector current of 150 mA, and a minimum current transfer ratio of 50% at 10 mA input. The device supports a forward current of up to 80 mA with a typical forward voltage of 1.5 V.

Feature Summary

• Photodarlington output structure for high gain
• High isolation voltage rating
• General-purpose design

Applications

• Industrial control systems
• Communication equipment
• Microprocessor system interfaces

Procurement Notes

Verify the specific suffix (e.g., M) against the datasheet to confirm isolation voltage and CTR specifications. Confirm RoHS compliance status as indicated in official documentation. Ensure the package type matches the required PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when high gain is required due to the photodarlington output stage. Compare the 4170 Vrms isolation rating against system safety requirements. Consider the operating temperature range limits for environmental suitability in the target application environment.

Part Context

This part belongs to the 4N33 series of general-purpose optocouplers manufactured by onsemi. It utilizes a standard 6-pin DIP package for through-hole mounting. The series is widely recognized for basic signal isolation tasks in electronic circuits.

Replacement Considerations

Direct substitutes may include other 4N33 variants such as the 4N33 or 4N33VM, though isolation voltages and specific electrical characteristics must be verified against the original design requirements.