2N4393

Jfets Overview

The Microchip Technology 2N4393 is an N-channel silicon Junction Field-Effect Transistor (JFET) utilizing InterFET N0132S geometry. It features a Gate-to-Source Breakdown Voltage of -40 V and a Drain-to-Source Saturation Current ranging from 5 mA to 30 mA. The device exhibits a low Gate-to-Source Cutoff Voltage between -0.5 V and -3.0 V, with typical gate leakage below 50 pA at room temperature. Static Drain-to-Source ON Resistance spans 30 Ω to 100 Ω. Dynamic characteristics include a Reverse Transfer Capacitance of 3.5 pF and turn-off delay times up to 50 ns. Available in TO-18, TO-92, SOT-23, and bare die packages.

Jfets Feature Summary

• InterFET N0132S geometry for low noise performance
• Low cutoff voltage suitable for low-level power supplies
• Hermetically sealed TO-18 package for military applications

Jfets Applications

• Low on resistance analog switches
• Chopper circuits
• Commutator designs

Jfets Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm the exact package type and binning options. Ensure compliance with RoHS standards if required by the application. Confirm that the selected variant matches the intended thermal and mechanical constraints for the final assembly process.

Jfets Selection Notes

Select the 2N4393 when a low gate cutoff voltage under 3.0 V is required for efficient switching or chopper applications. Compare IDSS ranges and RDS(ON) limits against circuit requirements. Consider package availability, such as TO-18 for hermetic sealing or SOT-23 for surface mount needs, based on board space and environmental conditions.

Jfets Part Context

The 2N4393 belongs to the InterFET 2N4391/2N4392/2N4393 series of N-channel JFETs. These devices share similar electrical characteristics but differ primarily in their Gate-to-Source Cutoff Voltage specifications. The series is designed for high-reliability switch and commutator applications, offering various packaging options including through-hole and surface mount configurations.

Jfets Replacement Considerations

Direct substitutes within the same series include the 2N4391 and 2N4392, which share the -40 V breakdown voltage but feature higher cutoff voltages (-4 V and -2 V respectively). Verify pinout compatibility across TO-18, TO-92, and SOT-23 packages before substitution.