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Product Detailed Parameters
- Description：TRANS 2NPN 30V 500MA TO-78-6
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Bulk
- Transistor Type：2 NPN (Dual)
- Current - Collector (Ic) (Max)：500mA
- Voltage - Collector Emitter Breakdown (Max)：30V
- Vce Saturation (Max) @ Ib, Ic：-
- Current - Collector Cutoff (Max)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：100 @ 150mA, 10V
- Power - Max：-
- Frequency - Transition：200MHz
- 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 MD2219A is a dual NPN amplifier and switch transistor housed in a TO-78 metal can package. It features a maximum collector current of 500 mA, a collector-base voltage of 60 V, and a collector-emitter voltage of 30 V. The device provides a minimum DC current gain (hFE) of 100 at a collector current of 300 mA and a collector-emitter voltage of 15 V. Saturation characteristics include a maximum base-emitter saturation voltage of 1.0 V at 10 mA base current and a maximum collector-emitter saturation voltage of 0.4 V at 10 mA collector current. The transition frequency (fT) is typically 150 MHz and reaches a minimum of 200 MHz.
Feature Summary
- Dual NPN configuration within a single hermetically sealed metal can
- Designed for general-purpose amplification and switching applications
- High current handling capability suitable for moderate power loads
Applications
- General-purpose signal amplification circuits
- Electronic switching applications
- Audio pre-amplifier stages
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 should focus on verifying existing stock availability or identifying alternative sources through distributor networks, as direct manufacturing orders are no longer accepted.
Selection Notes
Engineers selecting this component must account for its discontinued status. Design reviews should prioritize verifying if legacy inventory meets project timelines. If new production is required, designers must evaluate equivalent modern TO-78 or alternative package transistors that match the electrical specifications, particularly the 30V VCEO and 500mA IC ratings.
Part Context
The MD2219A belongs to a family of dual transistors manufactured by Central Semiconductor Corp. These devices utilize a TO-78 case style, which is a standard metal can package often used in military and aerospace applications due to its hermetic sealing properties. This specific model represents an NPN variant within the company's historical discrete semiconductor portfolio.
Replacement Considerations
No official replacement part numbers are listed by the manufacturer. Users requiring a substitute must source third-party equivalents that match the TO-78 package dimensions and the specified electrical parameters, specifically the 30V collector-emitter voltage and 500mA continuous collector current limits.
