MQ2N4391UB

Overview

The MQ2N4391UB is a silicon Junction Field-Effect Transistor (JFET) manufactured by Microchip Technology. It is housed in a TO-18-3 metal can package designed for through-hole mounting. The component belongs to the JFET product category and is classified under transistors. This specific part number represents a variant of the MQ2N4391 series, distinguished by its packaging suffix.

Feature Summary

• Utilizes silicon technology for stable operation
• Provides a hermetically sealed metal can enclosure

Applications

• Analog signal processing circuits
• Low-noise amplifier stages
• High-impedance input buffers

Procurement Notes

Verify the exact ordering suffix against official Microchip documentation to ensure correct package and performance specifications. Confirm that the TO-18-3 metal can form factor aligns with the target PCB layout and thermal management requirements before finalizing procurement decisions.

Selection Notes

Select this component when a ruggedized, hermetically sealed JFET is required for high-reliability applications. The TO-18-3 package offers superior environmental protection compared to plastic variants. Ensure the circuit design accommodates the physical dimensions and pinout configuration specific to this metal can style.

Part Context

This device is part of Microchip's discrete transistor portfolio, specifically within the JFET sub-category. It shares functional similarities with other members of the 2N4391 family but is defined by its unique TO-18-3 packaging. The component serves as a fundamental active element for analog electronics requiring high input impedance.

Replacement Considerations

Compatible substitutes include the MQ2N4391 and MX2N4391UB. Verify that alternative part numbers match the required TO-18-3 package and electrical characteristics to maintain circuit integrity.