4N33S

Overview

The onsemi 4N33S is a single-channel transistor output optocoupler featuring a photodarlington configuration with an accessible base connection. It utilizes a surface-mount SMD-DIP-6 package for through-hole compatible mounting. Key electrical parameters include a maximum collector-emitter voltage of 30 V and a peak forward current rating of 80 mA. The device provides high isolation capability with a rated insulation voltage of 5300 Vrms. Power dissipation is specified at 250 mW, and the unit operates within a temperature range of -55°C to +125°C.

Feature Summary

• Integrates a photodarlington output structure with a dedicated base terminal for enhanced control flexibility.

Applications

• Industrial control systems requiring galvanic isolation
• Signal switching in low-power electronic circuits
• Microcontroller interface isolation

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm RoHS compliance status and specific packaging variants prior to ordering. Ensure supply chain partners provide valid traceability documentation. Check for obsolescence notices or lifecycle changes directly from onsemi before finalizing procurement plans.

Selection Notes

Select this component when surface-mount integration is required alongside high-voltage isolation needs. The accessible base pin allows for speed optimization or linear operation modes not available in standard configurations. Evaluate thermal management requirements given the 250 mW power dissipation limit in compact SMD-DIP packages.

Part Context

This part belongs to the 4N33 series of optocouplers, designed for general-purpose isolation applications. The 'S' suffix denotes the surface-mount variant, distinguishing it from the traditional through-hole PDIP versions like the 4N33 and 4N33M. It maintains functional compatibility with the series while adapting to automated assembly processes.

Replacement Considerations

Direct substitutes include the 4N33 (PDIP) and 4N33M (PDIP) for through-hole designs. For equivalent surface-mount performance, verify pinout compatibility with other SMD-DIP-6 photodarlington outputs from onsemi or alternative manufacturers offering 5300 Vrms isolation ratings.