MX2N4391UB

Overview

The MX2N4391UB is a single N-channel Junction Field-Effect Transistor (JFET) manufactured by Microchip Technology. It utilizes silicon technology and is housed in a TO-18-3 through-hole package. The device features a drain-source breakdown voltage of 40 V and a gate-source breakdown voltage of -40 V. Key electrical characteristics include a maximum power dissipation of 360 mW, a continuous drain current of -100 pA, and an on-resistance of 30 Ohms. It operates within a temperature range of -65 C to +175 C.

Feature Summary

• Single N-channel JFET configuration for discrete signal processing
• Silicon-based construction with high thermal stability
• Through-hole mounting capability via TO-18-3 package

Applications

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

Procurement Notes

Verify the specific suffix 'UB' against official Microchip documentation to confirm exact binning or testing criteria, as suffixes often denote specific performance grades or packaging variations not detailed in generic listings. Confirm RoHS compliance status directly with the manufacturer, as some legacy JFET lines may have restricted substance declarations that differ from standard commercial variants. Ensure the ordering quantity meets any minimum order requirements specified in the official datasheet.

Selection Notes

Select this component when a robust N-channel JFET with a 40 V breakdown rating is required for through-hole assembly. The TO-18-3 package offers mechanical durability suitable for industrial environments. Consider the -100 pA drain current specification for low-power biasing needs. Verify that the 30 Ohm on-resistance aligns with the circuit's impedance matching requirements. The wide operating temperature range supports deployment in extreme conditions.

Part Context

This part belongs to the Microchip JFET family, specifically designed for analog signal handling. It serves as a discrete semiconductor solution distinct from integrated circuits. The MX2N series typically provides matched pairs or single units for balanced amplifier designs. As a silicon-based device, it offers reliability comparable to other industry-standard JFETs while maintaining Microchip's manufacturing quality standards for military and industrial sectors.

Replacement Considerations

Consult official cross-reference guides for equivalent N-channel JFETs in TO-18 packages. Verify pinout compatibility and electrical parameter overlaps before substitution. Generic replacements may lack the specific temperature ratings or breakdown voltages of the MX2N4391UB.