2N4091

Overview

The Microchip Technology 2N4091 is a single N-channel Junction Field-Effect Transistor (JFET) manufactured using silicon technology. It is housed in a TO-18-3 metal can package designed for through-hole mounting. The device features a drain-source breakdown voltage of 40 V and a gate-source breakdown voltage of -40 V. At zero gate-source voltage, the drain current is specified at 30 mA, with a corresponding on-resistance of 30 Ohms. The component supports a continuous drain current of up to 100 pA and dissipates 360 mW of power. It operates within an extended temperature range from -65°C to +175°C.

Feature Summary

• Utilizes silicon JFET technology for stable operation across extreme temperatures.
• Provides high input impedance characteristics suitable for precision analog applications.
• Features a robust metal TO-18-3 hermetic package for reliable performance.

Applications

• Low-noise signal amplification circuits
• High-impedance buffer stages
• Precision analog switching applications

Procurement Notes

Verify the specific manufacturer part number against official Microchip documentation, as the 2N4091 designation may correspond to legacy or cross-referenced components. Confirm RoHS compliance status and packaging details directly with the supplier, as availability varies. Ensure the TO-18-3 package dimensions match your PCB layout requirements before finalizing orders.

Selection Notes

Select this component when designing circuits requiring high input impedance and low noise at elevated temperatures. Compare the 30 mA drain current specification against alternative JFETs if higher current drive is needed. Verify that the 40 V breakdown voltage aligns with your circuit's maximum operating voltages to prevent device failure under transient conditions.

Part Context

The 2N4091 belongs to the family of N-channel JFETs produced by Microchip Technology. These devices are typically used in specialized analog front-end designs where standard silicon transistors may not provide sufficient input impedance or thermal stability. The TO-18-3 package indicates a traditional metal can construction often found in military or aerospace-grade specifications.

Replacement Considerations

Consult Microchip datasheets for direct equivalents such as the MV2N4091 or MX2N4091, which share identical electrical parameters including 40 V breakdown and 30 mA drain current. Verify pinout compatibility and package dimensions before substituting.