JANSM2N2221AUB

Single Bipolar Transistors Overview

The JANSM2N2221AUB is a radiation-hardened NPN silicon switching transistor manufactured by Microchip Technology. It belongs to the MIL-PRF-19500/255 qualified component family, specifically certified for the JANSM reliability level which ensures resistance up to 3K rads (Si). The device utilizes a ceramic surface-mount UB package designed for high-reliability environments. Key electrical ratings include a collector-emitter voltage of 50V and a continuous collector current of 800mA.

Single Bipolar Transistors Feature Summary

• Qualified to MIL-PRF-19500/255 standards with specific radiation hardness levels
• Constructed using silicon technology in a hermetically sealed ceramic package
• Designed for high-reliability applications requiring radiation tolerance

Single Bipolar Transistors Applications

• Military aerospace systems
• Satellite communication equipment
• High-altitude electronic subsystems

Single Bipolar Transistors Procurement Notes

Verify the specific radiation qualification level required for the target application against the JANSM rating. Confirm that the UB surface-mount package dimensions match the design footprint. Ensure supply chain sources provide valid traceability documentation consistent with military procurement standards.

Single Bipolar Transistors Selection Notes

Select this component when radiation tolerance is a primary constraint for NPN switching requirements. Compare the 50V breakdown voltage against circuit operating limits. Evaluate the thermal performance of the ceramic package relative to the system's heat dissipation capabilities.

Single Bipolar Transistors Part Context

This part is part of the broader 2N2221A series of small-signal bipolar junction transistors. While commercial variants exist, this specific designation denotes a specialized version engineered for harsh environments. It shares functional similarities with other radiation-hardened devices but offers distinct packaging and certification attributes.

Single Bipolar Transistors Replacement Considerations

Direct substitutes within the same radiation-hardened family include JANSL2N2221AUB and JANSP2N2221AUB. These alternatives offer higher radiation tolerance levels but require verification of package compatibility and parameter alignment.