4N32SMT&R

Overview

The 4N32SMT&R is a surface-mount optocoupler manufactured by Isocom Components 2004 LTD. It features a single channel with a Darlington transistor output and utilizes a 6-pin SMD package. The device provides an isolation voltage of 5300Vrms, as documented in the primary manufacturer specification. Key electrical parameters include a maximum forward current of 80 mA, a collector-emitter voltage of 60V, and a typical current transfer ratio of 500%. The component is designed for DC input applications.

Feature Summary

• Integrates an infrared emitting diode with a high-gain Darlington phototransistor output for enhanced signal transmission.
• Provides robust electrical isolation between input and output circuits to protect sensitive components.
• Utilizes a compact surface-mount design suitable for automated assembly processes.

Applications

• Signal isolation in industrial control systems
• Interface circuits for microprocessors and logic devices
• Power supply feedback loops

Procurement Notes

Verify the specific isolation voltage rating required for your application against the datasheet, as some distributor listings cite 2.5 kV while official specifications indicate 5.3 kVrms. Confirm the package type matches your PCB footprint requirements. Ensure the supplier provides the official data sheet to validate the Darlington output characteristics and current transfer ratio specifications before finalizing procurement.

Selection Notes

Select this component when high current transfer gain is necessary to drive loads directly without additional amplification stages. The Darlington configuration offers superior sensitivity compared to standard phototransistor outputs. Consider the slower switching speed inherent to Darlington structures when designing for high-frequency digital signals. Verify that the 60V collector-emitter voltage meets the load requirements of the target circuit.

Part Context

This part belongs to the 4N32 series of optocouplers, which are widely used for general-purpose isolation tasks. The 'SMT' suffix denotes the surface-mount technology variant, distinguishing it from through-hole DIP versions. Isocom Components manufactures this device to provide a cost-effective solution for basic isolation needs in consumer and industrial electronics.

Replacement Considerations

Direct pin-compatible replacements may include other 6-pin surface-mount Darlington optocouplers such as the 4N33SMT or equivalent variants from other manufacturers. Verify that substitute parts meet the same isolation voltage and current transfer ratio specifications to ensure circuit compatibility.