MQ2N4091UB

Overview

The MQ2N4091UB 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. Key electrical parameters include a drain-source breakdown voltage of 40 V, a gate-source breakdown voltage of 40 V, and a continuous drain current of 30 mA. The device exhibits an on-resistance of 30 Ohms and a power dissipation capacity of 360 mW. It operates within a temperature range from -65°C to +175°C.

Feature Summary

• Single N-channel JFET configuration for discrete circuit applications
• High maximum operating temperature capability up to 175°C
• Robust voltage ratings with 40 V breakdown limits for both drain-source and gate-source terminals

Applications

• Low-noise analog signal amplification
• High-impedance input stages in electronic circuits
• Constant current source implementations

Procurement Notes

Verify the specific suffix 'UB' against official Microchip documentation to confirm exact binning or testing criteria, as distributor listings may not fully detail suffix variations. Confirm RoHS compliance status directly with the manufacturer, as some sources indicate non-compliance for this series. Ensure the TO-18-3 package type matches the mechanical requirements of the target PCB design before procurement.

Selection Notes

Select the MQ2N4091UB when a high-temperature capable N-channel JFET is required with a 30 mA continuous current rating. Compare its 30 Ohm on-resistance against other variants like the MX2N4091UB if lower current thresholds are acceptable. Consider the TO-18-3 through-hole package constraints versus surface-mount alternatives if space is limited.

Part Context

This component belongs to the Microchip 2N4091 series of JFETs, which are designed for general-purpose switching and amplification. The series typically offers various current bins and packaging options to suit different manufacturing needs. The MQ2N4091UB represents a specific variant within this family, distinguished by its particular current characteristics and industrial-grade temperature specifications.

Replacement Considerations

The MX2N4091UB is a related part number within the same product family. Verify if the specific current bin differences between the MQ and MX prefixes meet the application requirements before substitution.