2N2222A

Single Bipolar Transistors Overview

The Microchip Technology 2N2222A is an NPN silicon switching transistor qualified per MIL-PRF-19500/255. It features a collector-emitter voltage of 50 Vdc, a collector current of 800 mAdc, and total power dissipation of 0.5 W in TO-18 packages. The device operates within a junction temperature range of -65 to +200 °C. Electrical characteristics include a DC current gain (hFE) ranging from 30 to 325 depending on bias conditions, with saturation voltages specified at various collector currents.

Single Bipolar Transistors Feature Summary

• Hermetically sealed metal can construction for environmental stability
• Qualified to military reliability standards including JANS radiation hardness
• Designed for high-speed switching applications with defined turn-on and turn-off times

Single Bipolar Transistors Applications

• Military-grade switching circuits requiring radiation tolerance
• High-speed digital logic interfaces
• General-purpose amplification in harsh environments

Single Bipolar Transistors Procurement Notes

Verify the specific qualification level (JAN, JANTX, JANTXV, or JANS) required for your application, as performance and availability vary by grade. Confirm package type compatibility, noting that UA variants are surface mount while standard versions use through-hole TO-18 cans. Ensure supply chain sources provide traceability documentation consistent with military procurement requirements.

Single Bipolar Transistors Selection Notes

Select this component when military qualification and hermetic sealing are mandatory. Compare hFE ranges against circuit gain requirements, noting variations between 2N2221A and 2N2222A types. Consider thermal resistance values for heat dissipation planning, as TO-18 packages have higher thermal impedance compared to plastic equivalents. Validate radiation hardness needs before choosing JANS variants.

Single Bipolar Transistors Part Context

This transistor belongs to the 2N2221/2N2222 family of NPN silicon devices. It serves as a robust alternative to commercial-grade transistors in aerospace and defense electronics. The part number denotes specific electrical thresholds and packaging options within the same manufacturing lineage.

Single Bipolar Transistors Replacement Considerations

Direct substitutes include 2N2221A for similar NPN switching performance. Verify pinout compatibility between TO-18 and surface-mount UA variants if changing form factors.