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How do you find the beta value of a transistor from a Datasheet?
The Beta is always available in the data sheet for the transistor. So find the data sheet and you’ll have the beta! If you want to determine it experimentally, it’s a little trickier. Find the collector and base current with a multimeter and the ratio of collector to base current gives the gain (beta).
What is ß in transistor?
What is Beta (β)? The beta of transistor is the amplification factor between the base current and the collector current. We can measure Beta of a transistor (current gain) using a voltage-current converter and current-voltage converter. Beta (β) is a characteristic of each transistor.
Why does the HFE change with each transistor?
HFE is beta. It changes with each transistor even if they have the same part number because it is a range. Some transistors have a high beta and others have a low beta. See the range on the datasheet for a transistor. Beta is the current gain, not the voltage gain of a transistor.
What to choose hfe or beta from the plot of datasheet?
Suppose I have this BC635 transistor, if I look at hFE then I’d say that the lowest value is 25 from that table in the Electrical Characteristics category, but if I look at the Figure 3. Base-Emitter Saturation Voltage from where I get the beta characteristic, on the right side of the plot beta is 10.
Why do some transistors have a high beta and low beta?
Some transistors have a high beta and others have a low beta. See the range on the datasheet for a transistor. Beta is the current gain, not the voltage gain of a transistor. Beta is affected by the amount of current and how many volts there is from collector to emitter, Temperature also affects it.
Is the beta characteristic the same as HFE?
Now I only learned about the beta characteristic in school, not about hFE, but I read online that they are the same thing, although this is not true judging from the datasheet I linked. The question is: What should I use in my calculations for the base current if I want to use a transistor as a simple DC switch, beta from the plot or hFE?