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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 2N2642 is a dual NPN low noise transistor housed in a TO-78 metal can package. It features a collector-base voltage of 45V, a collector-emitter voltage of 45V, and a maximum DC collector current of 30mA. The device provides a minimum DC current gain (hFE) of 100 at a collector current of 50mA and a collector-emitter voltage of 5V. The saturation voltage is specified as a maximum of 0.01V at a collector current of 5mA. The transition frequency (fT) is 10MHz, with a guaranteed hFE matching tolerance of 10% and a base-emitter voltage matching tolerance of 5mV.
Feature Summary
- Dual NPN configuration within a single hermetically sealed TO-78 metal case
- Optimized for low noise amplification applications
- Guaranteed hFE matching between the two internal transistors
Applications
- Low noise amplifier circuits
- RF signal processing stages
- Precision analog switching applications
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 availability through authorized distributors or direct inquiry to the manufacturer's engineering team for potential alternate sourcing assistance.
Selection Notes
Select this component when a matched pair of low noise NPN transistors is required in a hermetically sealed metal package. Ensure the design accommodates the 45V voltage limits and 30mA current constraints. Verify that the TO-78 footprint is compatible with the target PCB layout, noting that surface mount alternatives may be necessary if through-hole mounting is not feasible.
Part Context
The 2N2642 belongs to a family of dual transistors manufactured by Central Semiconductor Corp in the TO-78 case style. This series includes various NPN and PNP configurations designed for high-reliability applications requiring matched electrical characteristics. The TO-78 package provides robust environmental protection suitable for demanding operating conditions.
Replacement Considerations
No official replacement part numbers are listed by the manufacturer. Designers must evaluate alternative dual NPN low noise transistors in different packages, ensuring compatibility with voltage ratings, current limits, and physical mounting requirements.
