4N33SMT&R

Overview

The 4N33SMT&R is a surface-mount optocoupler manufactured by Isocom Components 2004 LTD. It features a single channel with a Darlington transistor output and a 6-pin SMD package. Key electrical parameters include an isolation voltage of 5300Vrms, a maximum forward current of 80 mA, and a typical current transfer ratio of 500%. The device operates within a temperature range of -55°C to +100°C.

Feature Summary

• Integrates an infrared emitting diode with a high-gain Darlington phototransistor for enhanced signal transmission.
• Provides robust electrical isolation between input and output circuits via a 5300Vrms dielectric barrier.
• Designed for surface-mount assembly using a compact 6-pin SMD form factor.

Applications

• Industrial control systems requiring galvanic isolation
• Signal switching in microprocessor interfaces
• Power supply feedback loops

Procurement Notes

Verify the manufacturer designation on the component marking against official Isocom Components 2004 LTD documentation. Confirm the specific suffix matches the requested surface-mount variant. Ensure compliance with relevant safety standards required for your application's isolation rating before finalizing procurement.

Selection Notes

Select this component when high current transfer gain is necessary to drive loads directly without additional amplification. The Darlington configuration offers superior sensitivity compared to standard phototransistor outputs. Verify that the 6-pin SMD footprint aligns with the printed circuit board layout constraints.

Part Context

This part belongs to the 4N33 series of optocouplers, which are widely used for general-purpose isolation. The SMT&R suffix indicates a tape-and-reel packaging format suitable for automated surface-mount placement processes, distinguishing it from through-hole DIP equivalents.

Replacement Considerations

Public confirmed substitute part numbers: None listed in source data.