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BC117 Transistor Data
Key transistor data for the BC117 high voltage small signal transistor including key electrical parameters, pinout, package type and many other key transistor datasheet details.
Key details and performance parameters for the BC117 transistor.
| BC117 transistor datasheet parameters & data |
|
|---|---|
| Parameters | Details |
| Transistor type | NPN silicon audio transistor |
| Package type | TO105 |
| VCBO max (V) | 120 |
| VCEO max (V) | 120 |
| VEBOmax (V) | 5 |
| IC max (mA) | 50 |
| TJ Max °C | 125 |
| PTOT mW | 300 |
| fT min (MHz) | 60 |
| COB | 9p |
| hfe | 30 min |
| IC for hfe | 30mA |
| Similar / equivalents | |
Outline:
Pinout:
Explanation of transistor parameters
| Parameter | Explanation |
|---|---|
| VCBO Max | Maximum collector-base voltage with emitter open circuit . |
| VCEO Max | Maximum collector-emitter voltage with base open circuit. |
| VEBO Max | Maximum emitter-base voltage with collector open circuit. |
| VCEsat (included where applicable) | The voltage drop across the collector-emitter when the transistor is fully saturated (acting as a closed switch). |
| IC Max | Maximum collector current. |
| Parameter | Explanation |
|---|---|
| TJ | Maximum junction temperature. |
| PTOT Max | Maximum device dissipation normally in free air at 25°C unless other conditions indicated. |
| fT Min | Minimum cutoff frequency at which the current gain in a common emitter circuit falls to unity. |
| COB Max | Maximum collector capacitane, normally measured with emitter open circuit. |
| hFE | DC current gain for HFE at IC. [Note hfe is the small signal gain and although this may be slightly different, the transistor current gain will vary considerably from ne transistor to the next of the same type.] |
| PTOT Max | Maximum device dissipation normally in free air at 25°C unless other conditions indicated. |
These are the main transistor parameters that have been included in our list. There are others, but these help quantify the main elements of the performance of the transistor.
Please note, that the data given is the best estimate we can give within a tabulated summary of this nature. Parameters also vary between manufacturers. Electronics Notes cannot accept any responsibility for errors, inaccuracies, etc, although we do endevaour to ensure the data is as accurate as possible.
Notes and supplementary information
• Availability & sources
The device is available from a number of stockists and electronic component distributors.
• Further details
The BC117 is described as a small high voltage NPN transistor. The VCEO and VCBO withstand voltages are well above those for most other transistors for the size.
The most common outline is the TO105 and that is given in the data above, but references to a TO18 style can have also been seen.
The TO105 is a plastic encapsulation and with the higher voltages that an be used with this transistor, it seems sensible to have a plastic encapsulation.
While the operating voltages are higher, the current levels and other parameters are not as high as may be obtained with lower voltage transistors, but this is a trade-off that might need to be made.
Written by Ian Poole .
Experienced electronics engineer and author.
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