2N4391UB/TR

Jfets Overview

The Microchip Technology 2N4391UB/TR is a silicon N-channel Junction Field-Effect Transistor (JFET) designed for high-reliability applications. It utilizes a hermetically sealed TO-18 metal can package to ensure environmental stability and long-term performance in demanding conditions. The device operates with a drain-source breakdown voltage of 40 V and a gate-source breakdown voltage of -40 V. Key electrical characteristics include a maximum continuous drain current of 100 mA, a typical zero-bias drain current of 30 mA, and a power dissipation rating of 360 mW. It supports an operating temperature range from -65°C to +175°C.

Jfets Feature Summary

• Hermetically sealed TO-18 metal can construction provides robust protection against moisture and contaminants.
• Silicon JFET technology ensures stable operation across extreme temperature environments.
• High breakdown voltage ratings support reliable performance in high-voltage circuit applications.

Jfets Applications

• Military and aerospace electronic systems requiring radiation-hardened or high-reliability components
• Harsh environment instrumentation and sensor signal conditioning circuits
• High-temperature industrial control and monitoring equipment

Jfets Procurement Notes

Verify the specific suffix configuration when ordering, as it may indicate tape-and-reel packaging variations compared to individual units. Confirm RoHS compliance status directly with the manufacturer, as historical data indicates non-compliance for certain variants. Ensure that the procurement channel sources authentic Microchip Technology products to guarantee the integrity of the hermetic seal and electrical specifications.

Jfets Selection Notes

Select this component when a ruggedized, hermetically sealed N-channel JFET is required for high-temperature or harsh environments. Compare the 40 V breakdown voltage and 360 mW power dissipation against circuit requirements. Consider the TO-18 package dimensions for board layout constraints. Evaluate alternative part numbers within the same family if different pin configurations or electrical tolerances are needed for the specific design.

Jfets Part Context

This component belongs to the Microchip Technology 2N4391 series of silicon N-channel JFETs. The 'UB' designation typically denotes a specific binning or testing standard, while '/TR' indicates tape-and-reel packaging. This series is engineered for durability and consistency, distinguishing it from standard commercial-grade transistors by its enhanced thermal and mechanical resilience suitable for critical infrastructure.

Jfets Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with generic equivalents based on matching TO-18 pinouts, voltage ratings, and current capabilities before substitution.