2N4393-2

Jfets Overview

The Vishay Siliconix 2N4393-2 is an N-channel Junction Field-Effect Transistor (JFET) from the 2N/PN/SST4391 series. It features a Gate-Source Cutoff Voltage (VGS(off)) ranging from -0.5 V to -3 V and a maximum Drain-Source On-Resistance (rDS(on)) of 100 Ω at ID = 1 mA. The device exhibits a typical turn-on time (tON) of 4 ns, low capacitance below 3.5 pF, and negligible off-error leakage. It supports operating junction temperatures up to 200 °C for hermetic packages.

Jfets Feature Summary

• Fast switching capability with a typical turn-on time of 4 ns
• High off-isolation characterized by extremely low drain cutoff current
• Low insertion loss and minimal input capacitance under 3.5 pF
• Negligible off-state error voltage ensuring high accuracy

Jfets Applications

• Analog switches
• Choppers
• Sample-and-hold circuits
• Normally on switches
• Current limiters

Jfets Procurement Notes

Verify the specific package prefix required for the application. The '2N' prefix denotes a hermetically sealed TO-206AA (TO-18) can suitable for military processing per MIL-S-19500. Confirm that the ordering suffix matches the desired packaging format, such as bulk or tape-and-reel options available for PN and SST prefixes.

Jfets Selection Notes

Select this component when a normally on switch with a very low gate-source cutoff voltage is required. The 2N4393 variant is specifically designed for applications needing a VGS(off) between -0.5 V and -3 V. Ensure the circuit design accommodates the maximum rDS(on) of 100 Ω and the specific power dissipation limits associated with the chosen package type.

Jfets Part Context

This part belongs to the 2N/PN/SST4391 series of N-channel JFETs manufactured by Vishay Siliconix. The series includes variants differentiated by their cutoff voltage ranges and physical packaging styles. The 2N4393 represents the lowest cutoff voltage option within the lineup, optimized for low-level power supply control and precision analog switching tasks.

Jfets Replacement Considerations

Consult the 2N5564/5565/5566 datasheet for similar dual product alternatives. Verify pinout compatibility and electrical parameter overlaps before substituting other N-channel JFETs in existing designs.

Jfets FAQ

What is the maximum Drain-Source On-Resistance for the 2N4393?

The maximum Drain-Source On-Resistance (rDS(on)) is 100 Ω, measured at a drain current of 1 mA and zero gate-source voltage.

Does the 2N4393 support military-grade processing?

Yes, the 2N prefix version utilizes a hermetically sealed TO-206AA (TO-18) can and is available with processing per MIL-S-19500.

What is the typical turn-on time for this JFET?

The typical turn-on time (tON) is specified as 4 ns across the 2N/PN/SST4391 series.