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Product Detailed Parameters
- Description：TRANS 2NPN 45V 30MA TO-78-6
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Bulk
- Transistor Type：2 NPN (Dual)
- Current - Collector (Ic) (Max)：30mA
- Voltage - Collector Emitter Breakdown (Max)：45V
- Vce Saturation (Max) @ Ib, Ic：-
- Current - Collector Cutoff (Max)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：100 @ 10µA, 5V
- Power - Max：600mW
- Frequency - Transition：40MHz
- Operating Temperature：-
- Mounting Type：Through Hole
- Package / Case：TO-78-6 Metal Can
- Supplier Device Package：TO-78-6
- Grade：-
- Qualification：-
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Overview
The Central Semiconductor Corp 2N2643 is a dual NPN low noise transistor housed in a TO-78 metal case. It features a collector-base voltage of 45V and a collector-emitter voltage of 45V. The device supports a maximum DC collector current of 30mA with a total power dissipation of 600mW at 25°C ambient temperature. Electrical characteristics include a minimum DC current gain (hFE) of 100, a maximum collector-emitter saturation voltage of 0.01V at 100mA, and a transition frequency (fT) of 10MHz. The datasheet specifies a base-emitter voltage matching tolerance of 20%.
Feature Summary
- Dual NPN configuration within a single hermetically sealed metal package
- Optimized for low noise amplification applications
- High DC current gain capability for signal processing
- Low collector-emitter saturation voltage for efficient switching
Applications
- Low noise amplifier circuits
- Signal processing stages
- RF front-end modules
Procurement Notes
This component has been officially classified as End of Life by the manufacturer. No replacement part numbers are currently available from Central Semiconductor Corp. Procurement requires verification of existing stock or secondary market availability, as standard production channels are closed. Engineering support may assist in locating alternate sources if necessary.
Selection Notes
Designers should note that this device is discontinued and no longer in active production. Selection requires identifying equivalent components from other manufacturers that match the TO-78 footprint and electrical specifications. Verify pinout compatibility and thermal requirements before integrating alternative parts into existing designs.
Part Context
The 2N2643 belongs to a family of dual transistors manufactured by Central Semiconductor Corp in the TO-78 case style. This specific series includes various NPN and PNP variants designed for general-purpose and low-noise applications. The entire line of TO-78 packaged devices has been transitioned to End of Life status due to declining demand.
Replacement Considerations
No official replacement part numbers are listed by the manufacturer. Engineers must source equivalents from other vendors, ensuring strict adherence to the original TO-78 package dimensions and pinout configuration to maintain board compatibility.
