MD2369B

Overview

The MD2369B is a small signal NPN silicon dual transistor housed in a TO-78 metal cylindrical package. It contains two separate elements designed for saturation switching applications. The device supports a maximum collector current of 500 mA and a collector-emitter voltage of 15 V. Key electrical characteristics include a minimum DC current gain (hFE) of 40 at 10 mA, a collector-emitter saturation voltage of 1 V max at 100 mA, and a transition frequency (fT) ranging from 10 to 500 MHz. The component features a 20% hFE matching tolerance and a base-emitter voltage difference of 10 mV.

Feature Summary

• Dual NPN configuration within a single metal can package
• Optimized for high-speed saturation switching operations
• High current handling capability up to 500 mA per element
• Precise parameter matching between the two internal transistors

Applications

• High-speed digital logic circuits requiring matched pairs
• Saturation switching networks in pulse generation systems
• Driver stages for relay or solenoid control interfaces

Procurement Notes

This component has been officially classified as End of Life by Central Semiconductor Corp. No replacement part numbers are currently available in their portfolio. Procurement must rely on existing surplus stock or secondary market channels. Verify manufacturing date codes carefully, as production ceased according to the official product discontinuation notice.

Selection Notes

Designers should evaluate alternative manufacturers offering equivalent TO-78 dual NPN transistors with comparable saturation voltages and current ratings. Ensure that any substitute maintains the required 500 mA collector current capacity and 15 V breakdown voltage. Verify that the replacement package matches the original pinout and thermal dissipation requirements for the specific application environment.

Part Context

The MD2369B belongs to the MD2369 series of dual transistors manufactured by Central Semiconductor Corp. This series includes variants such as the MD2369 and MD2369A, which share similar electrical profiles but differ in matching tolerances. All devices in this family utilize the robust TO-78 metal case construction, historically favored for military and aerospace reliability standards before widespread adoption of plastic packages.

Replacement Considerations

Central Semiconductor lists no direct replacement for the MD2369B. Engineers must source equivalents from other semiconductor vendors. Cross-reference specifications focusing on TO-78 compatibility, NPN polarity, and saturation performance metrics.