4N32SD

Overview

The onsemi 4N32SD is a single-channel photodarlington output optocoupler designed for surface-mount applications. It features a 6-SMD gull-wing package and provides high isolation voltage of 5300 Vrms. 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%. The device operates within a temperature range of -40°C to +100°C and has a power dissipation rating of 270 mW.

Feature Summary

• High isolation voltage capability for safe signal transmission between isolated circuits
• Photodarlington output structure providing high current transfer efficiency
• Surface-mount gull-wing package design for automated assembly integration

Applications

• Industrial control systems requiring galvanic isolation
• Signal transmission in noisy electrical environments
• Power supply feedback loops for circuit protection

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and isolation ratings. Confirm availability status as some variants may be obsolete or have long lead times. Ensure the selected package matches the PCB footprint requirements. Check for RoHS compliance documentation if required by project specifications.

Selection Notes

Select this component when high isolation voltage and surface-mount form factor are required. Compare current transfer ratio requirements against load needs. Consider thermal management due to power dissipation limits. Verify compatibility with input drive currents and output switching speeds for the specific application timing constraints.

Part Context

This part belongs to the 4N32 series of optocouplers from onsemi. It shares functional similarities with through-hole variants like the 4N32M but utilizes a surface-mount package. The series is commonly used in general-purpose isolation applications where cost-effective and reliable signal transfer is necessary.

Replacement Considerations

Publicly confirmed substitute part numbers include 4N32SR2M. Verify pin compatibility and electrical specifications before substitution.