2N2223

Overview

The Central Semiconductor Corp 2N2223 is a dual silicon NPN transistor manufactured via the epitaxial planar process. It integrates two individual chips within a hermetically sealed TO-78 metal case, designed for differential amplifier applications. Key electrical ratings include a collector-base voltage of 100 V, a collector-emitter voltage of 60 V, and a continuous collector current of 500 mA. Power dissipation is rated at 500 mW per die and 600 mW for both dice combined. The device operates across a junction temperature range of -65 to +200 °C.

Feature Summary

• Dual NPN configuration with matched characteristics suitable for differential amplifier circuits
• Hermetically sealed metal package ensuring environmental protection
• Epitaxial planar manufacturing process for consistent performance

Applications

• Differential amplifier circuits
• Balanced input stages requiring matched transistor pairs
• High-reliability analog signal processing

Procurement Notes

This component has been officially classified as End of Life (EOL) by Central Semiconductor Corp. No replacement part numbers are currently available from the manufacturer. Procurement should be limited to existing inventory or secondary market sources, as new production has ceased. Verify authenticity carefully when sourcing from non-direct suppliers due to the discontinued status.

Selection Notes

Select this component only if a hermetically sealed dual NPN pair in a TO-78 metal case is strictly required for specific legacy designs. Modern alternatives typically utilize surface-mount packages or single transistors. Ensure the design can accommodate the physical dimensions and mounting requirements of the TO-78 case before finalizing the selection.

Part Context

The 2N2223 belongs to a family of dual bipolar junction transistors historically used in precision analog applications where matching between two transistors was critical. Unlike standard single transistors, it provides two electrically isolated but thermally coupled NPN structures on a single substrate, facilitating balanced circuit topologies.

Replacement Considerations

No direct replacement part numbers are listed by the manufacturer. Designers must evaluate discrete single NPN transistors or alternative dual transistor packages that meet the required voltage, current, and thermal specifications.