JAN2N4449UB

Single Bipolar Transistors Overview

The JAN2N4449UB is a military-grade NPN small-signal bipolar junction transistor (BJT) manufactured by Microchip Technology. It utilizes a hermetic ceramic package designed for high reliability in demanding environments. The device supports a collector-emitter voltage of 40V and a continuous collector current of 600mA. With a maximum power dissipation of 500mW, it operates within an extended temperature range from -55°C to +175°C. This component is classified as a general-purpose switching diode equivalent in function but structured as a discrete transistor for robust circuit applications.

Single Bipolar Transistors Feature Summary

• Hermetic ceramic construction ensures environmental sealing and long-term stability
• Qualified for military specifications requiring high reliability standards
• Capable of operating at elevated temperatures up to 175°C

Single Bipolar Transistors Applications

• Military aerospace electronic systems
• High-reliability communication equipment
• Harsh environment signal processing circuits

Single Bipolar Transistors Procurement Notes

Verify the specific revision level and lot traceability documentation when sourcing this military-grade component. Confirm that the supplier provides full compliance with MIL-PRF-19500 or relevant military standards. Ensure the hermetic seal integrity is maintained during handling and installation to preserve the device's environmental protection capabilities.

Single Bipolar Transistors Selection Notes

Select this component when standard commercial transistors fail to meet thermal or reliability requirements. The hermetic package distinguishes it from plastic-packaged equivalents like the 2N4449UB. Consider the higher cost associated with military qualification and ceramic packaging against the necessity for extreme temperature operation and radiation hardness in critical infrastructure.

Single Bipolar Transistors Part Context

This part belongs to the JAN series of devices, which are specifically qualified for military use. It serves as a ruggedized alternative to commercial small-signal transistors. The manufacturer maintains strict quality controls for this line to ensure performance consistency across production lots intended for defense and aerospace sectors.

Single Bipolar Transistors Replacement Considerations

The 2N4449UB/TR is a commercial equivalent but lacks hermetic sealing and military qualification. Substitution requires verifying if the application environment permits non-hermetic packages. No direct military-to-military cross-reference is confirmed in available public data.