It’s usually around 100, but
can range from 50 to 200
…even 2000, depending on which transistor you’re using and how much current is running through it. If your transistor had a β of 100, for example, that’d mean an input current of 1mA into the base could produce 100mA current through the collector.
What is maximum rating of a transistor?
For transistors, the maximum ratings are defined based on the
absolute maximum rating approach
. The absolute maximum ratings are the highest values that must not be exceeded during operation even instantaneously. When two or more ratings are specified, two ratings can not be applied to the transistor at the same time.
Can a transistor handle 12V?
With NPN transistors, you can’
t switch
on the high side unless the base is a higher voltage than the emitter. If you’re using 12V, you shouldn’t have a problem with this. … This means that the transistor is on about as much as it can be, so it will have only a small voltage drop (~0.3V) across it.
What is the maximum base current in transistor?
The maximum Base current rating is
1/3rd the Collector current
(1/10th in the case of Darlington transistors).
How much voltage can a BJT handle?
The rating for maximum collector-emitter voltage V
CE
can be thought of as the maximum voltage it can withstand while in cutoff mode (no base current). This rating is of particular importance when using a bipolar transistor as a switch. A typical value for a small signal transistor is
60 to 80 V
.
How do PNP transistor?
The PNP transistor is a type of transistor in which one n-type material is doped with two p-type materials. … When
a small current flow through the base of the PNP transistor
, it turns on. The current in a PNP transistor flows from the emitter to the collector.
What is current gain formula?
Current gain is the ratio of the change in the collector current to the change in the emitter current in a transistor. … Now, substitute the value of the change in the emitter current as 5 mA and 0.99 as the current gain in the formula
α=△Ic△Ie
to determine the change in the collector current in the transistor.
How many volts is a transistor?
Generally speaking, this value is
between . 6 to . 7 volts
for a general-purpose transistor.
How do you calculate the power dissipation of a transistor?
The power dissipated in the transistor is
the voltage drop across the collector emitter junction times the collector current
(neglecting the base current times the 0.75V base emitter drop). In the linear range this could be something like
[email protected]
= 600mW (a lot for a little transistor).
Is highest current in any BJT?
The common emitter amplifier configuration
produces the highest current and power gain of all the three bipolar transistor configurations.
Can I use PNP instead of NPN?
Generally, the
PNP transistor can replace NPN
transistors in most electronic circuits, the only difference is the polarities of the voltages, and the directions of the current flow. PNP transistors can also be used as switching devices and an example of a PNP transistor switch is shown below.
What is the full form of PNP transistor?
The full form of PNP transistor is
a Positive Negative Positive Transistor
.
How do I enable PNP?
Open the Control Panel
. Click Network and Sharing Center. In the left pane, click the link for Change advanced sharing settings. In the Network Discovery section, select the option for Turn on network discovery and click the Save changes button.
