2SK4085LS

Single FETs, MOSFETs Overview

The onsemi 2SK4085LS is a single N-channel silicon MOSFET designed for high-voltage switching applications. It features a 500V drain-source breakdown voltage and supports continuous drain currents of up to 16A, with some documentation citing 11A ratings. The device exhibits a maximum on-resistance of 430 mΩ at Vgs = 10V. Packaged in a TO-220F-3FS (TO-220) through-hole format, it operates within a junction temperature range up to 150°C and dissipates up to 40W when case-mounted. Input capacitance is specified at 1200 pF.

Single FETs, MOSFETs Feature Summary

• High-voltage capability with 500V drain-source breakdown rating
• Low on-resistance for efficient power switching
• Robust thermal performance with 40W case-mount dissipation
• Through-hole mounting for reliable mechanical connection

Single FETs, MOSFETs Applications

• Industrial motor control systems
• High-voltage DC-DC converters
• Power supply output stages

Single FETs, MOSFETs Procurement Notes

Verify the specific suffix (e.g., -1E, -CBC11) as variants may exist. Confirm RoHS compliance status directly from the manufacturer datasheet. Check current availability as this component may be subject to lifecycle changes or discontinuation. Ensure the TO-220F package matches your PCB footprint requirements before ordering.

Single FETs, MOSFETs Selection Notes

Select this component for applications requiring moderate current handling at 500V. Compare Rds(on) values against system efficiency targets. Ensure gate drive voltage aligns with the 10V test condition for optimal resistance. Verify thermal management solutions can handle the specified power dissipation limits under worst-case operating conditions.

Single FETs, MOSFETs Part Context

This part belongs to the 2SK4085LS series of N-channel MOSFETs manufactured by onsemi. It is a legacy product originally associated with Fairchild Semiconductor prior to their acquisition by onsemi. The series is characterized by its use in general-purpose high-voltage switching circuits where through-hole reliability is preferred over surface-mount alternatives.

Single FETs, MOSFETs Replacement Considerations

Direct substitutes include the 2SK4085LS-CBC11 variant. Cross-reference with other 500V N-channel TO-220 MOSFETs from different manufacturers if pinout compatibility is required. Verify that replacement parts meet or exceed the 430 mΩ Rds(on) and 500V Vds specifications.