MX2N4391UB/TR

Overview

The MX2N4391UB/TR is a silicon N-channel Junction Field-Effect Transistor (JFET) manufactured by Microchip Technology. It utilizes a TO-18-3 metal can package designed for through-hole mounting. The device features an N-channel configuration with a single internal transistor structure. Key electrical characteristics include a drain-source breakdown voltage of 40 V and a gate-source breakdown voltage of -40 V. The maximum power dissipation is rated at 360 mW, supporting operation within a temperature range of -65°C to +175°C.

Feature Summary

• Utilizes silicon technology for robust performance in demanding environments
• Encapsulated in a hermetically sealed TO-18-3 metal can package
• Designed for through-hole installation on printed circuit boards
• Supports extended operating temperatures up to +175°C

Applications

• Low-noise analog signal amplification circuits
• High-impedance input stages in measurement equipment
• Precision current source implementations
• RF front-end matching networks

Procurement Notes

Verify the specific suffix 'TR' against official Microchip documentation to confirm tape-and-reel packaging status, as standard listings often indicate individual units. Ensure the procurement channel sources directly from authorized distributors or the manufacturer to guarantee component authenticity and traceability. Cross-reference the Mouser part number 494-MX2N4391UB for accurate catalog alignment.

Selection Notes

Select this component when high input impedance and low noise figures are required in analog designs. The TO-18-3 package necessitates through-hole assembly processes, which may influence PCB layout decisions compared to surface-mount alternatives. Consider the 40 V breakdown rating to ensure adequate headroom for the intended supply voltages and signal swings in the application circuit.

Part Context

This JFET belongs to the broader category of discrete semiconductor transistors produced by Microchip Technology. It serves as a fundamental active component in electronic systems requiring precise control of electron flow. The TO-18-3 form factor represents a legacy but reliable packaging style often preferred for its thermal stability and mechanical durability in specialized industrial and aerospace applications.

Replacement Considerations

Publicly confirmed substitute part numbers for the MX2N4391UB/TR are not available in the provided reference data. Verify pinout compatibility and electrical parameter tolerances before considering any generic N-channel JFET replacements.