2N4858UB/TR

Jfets Overview

The 2N4858UB/TR is a silicon N-channel Junction Field-Effect Transistor (JFET) manufactured by Microchip Technology. It features a round-end JFET configuration with a maximum drain-source voltage of 40V and a continuous drain current rating of 50mA. The device supports a power dissipation of 360mW and operates within an extended temperature range from -65°C to +200°C. Packaged in bulk, this component utilizes SMD/SMT mounting styles for surface mount applications.

Jfets Feature Summary

• High-temperature operation capability up to 200°C
• Silicon N-channel JFET technology
• Round-end JFET construction

Jfets Applications

• High-temperature analog signal processing
• Low-noise amplifier circuits
• Constant current source implementations

Jfets Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and tape/reel specifications. Ensure that the requested quantity aligns with manufacturer minimum order requirements. Confirm RoHS compliance status directly through the datasheet or product change notifications prior to finalizing procurement orders.

Jfets Selection Notes

Select this component when high-temperature stability is required for analog front-end designs. Compare the 40V breakdown voltage and 50mA current limits against circuit requirements. Evaluate the 360mW power dissipation constraint relative to thermal management capabilities in the target application environment.

Jfets Part Context

This part belongs to Microchip's high-reliability discrete semiconductor portfolio. It is designed for demanding environments where standard commercial components may fail. The 2N4858 series provides consistent electrical characteristics suitable for precision analog applications requiring robust performance under extreme thermal conditions.

Jfets Replacement Considerations

Consult official cross-reference guides for verified substitutes. Ensure replacement parts match the 40V Vds, 50mA Id, and SMD package constraints. Verify pinout compatibility and thermal resistance values before implementing any alternative components.