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How to choose transistor replacement?
Choose a transistor with a similar power dissipation : It is necessary to ensure that the replacement transistor can handle the power that it will dissipate within the circuit. Choosing a replacement transistor with a similar can style will often mean that both transistors have a similar power dissipation.
How to choose a replacement for a bipolar transistor?
Choosing a replacement BJT with approximately the same current gain is necessary.
- Frequency. It is usually important to ensure that the replacement BJT can meet any frequency limits or requirements in your device, so it will not affect the function of original application.
- Power dissipation.
Can you interchange transistors?
So yes transistors are interchangeable, if the type (npn/pnp) and required specs match. If the current through a transistor was only 10mA and they have a part that can tolerate 1A, well, that’s a bit much, and you can find a part that is more suited to what the circuit it.
When to choose a replacement transistor for an electronic circuit?
When choosing a suitable replacement transistor for use within an electronic circuit, there are several stages that must be considered when making the choice. These can be progressed in a logical order to narrow down the choice and enable the best alternative for the replacement transistor to be made.
What happens if you install the wrong type of transistor?
Install the incorrect type and it experience the inverse of all the voltages it would expect and is likely to be destroyed. General application: Although it is not always necessary to exactly match the intended purpose for the transistor, a variety of areas of its performance will be tailored to its intended applications.
How can you tell if a germanium transistor is still working?
It may be possible to discover this in a number of ways. If the original transistor is still working then this can be discovered by measuring the voltage across the base emitter junction when it is forward biased. This should be about 0.2 to 0.3 volts for a germanium transistor and 0.6 volts for other varieties.
What is the upper frequency limit for a transistor?
Frequency limit: The upper frequency limit for a transistor is normally quoted as its ft. It is normally important to ensure that the transistor can meet any frequency limits. Power dissipation: It is necessary to ensure that the replacement transistor can dissipate sufficient power.
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