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Why Transistors are not used as switching devices?
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Answer Posted / dr.anil
Actually, The question is incorrect. All of the transistors
can be used as a switch because transistors has current
on/off properties.There are 2 types of transistors one is
BJT(3 Terminal) and FETs(4 Terminal). BJT has low conduction
loss but has high switching losses whereas a FET
specially(IGBT or MOSFETs) have low sitching losses. That is
why MOSFET is preferred as switches instead of BJT in High
power, High Frequency applications.
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