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Product Detailed Parameters
- Description：TRANS 2NPN 12V 50MA TO-78-6
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Bulk
- Transistor Type：2 NPN (Dual)
- Current - Collector (Ic) (Max)：50mA
- Voltage - Collector Emitter Breakdown (Max)：12V
- Vce Saturation (Max) @ Ib, Ic：-
- Current - Collector Cutoff (Max)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：25 @ 3mA, 1V
- Power - Max：-
- Frequency - Transition：900MHz
- 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 MD5179 is a dual NPN transistor housed in the TO-78 metal can package. Designed for VHF and UHF oscillator applications, it features a collector-base voltage of 20V and a collector-emitter voltage of 12V. The device supports a maximum collector current of 50mA with a transition frequency of 900MHz. Electrical characteristics include a minimum DC current gain (hFE) of 25 at 300mA and a saturation voltage of 0.4V at 10mA. It also specifies a base-emitter voltage matching tolerance of 10mV.
Feature Summary
- Dual NPN configuration optimized for high-frequency oscillator circuits
- Metal TO-78 hermetic packaging for robust performance
- High transition frequency suitable for VHF/UHF bands
Applications
- VHF oscillator circuits
- UHF oscillator circuits
- High-frequency amplification stages
Procurement Notes
This component has been officially classified as End of Life by Central Semiconductor Corp. No replacement part numbers are currently available from the manufacturer. Procurement should focus on verifying existing stock availability through authorized distributors or exploring alternative sourcing channels directly with the manufacturer's engineering team.
Selection Notes
Engineers selecting this component must account for its discontinued status. Since no direct replacements are listed in official documentation, design modifications may be necessary to accommodate modern equivalents. Verify that any substitute maintains the required TO-78 form factor or adapts to a compatible surface-mount footprint if redesigning the PCB layout.
Part Context
The MD5179 belongs to a series of dual transistors manufactured by Central Semiconductor Corp. These devices were historically utilized in specialized analog and RF designs requiring matched pairs within a single metal package. The product line reflects older semiconductor manufacturing standards focused on high-reliability metal can construction.
Replacement Considerations
Official documentation lists 'N/A' for all replacement parts associated with the MD5179. No cross-reference substitutes are provided by the manufacturer. Designers must identify functional equivalents independently based on electrical parameters and package constraints.
