npn transistor help

I

ILikeComputers

Member

• Oct 17, 2009

• #1

Hi!
I need a npn switching transistor that runs on a 9v or less circuit. Any ideas on what to get???

 

ericgibbs

Well-Known Member

Most Helpful Member

• Oct 17, 2009

• #2

ILikeComputers said:

Hi!
I need a npn switching transistor that runs on a 9v or less circuit. Any ideas on what to get???

Click to expand...

hi,
Most transistors will work from a 9V supply.
You must consider the current the switching transistor is going to conduct, collector/emitter, what do you want to control.?

A good general purpose transistor is the 2N2222.

 

I

ILikeComputers

Member

• Oct 17, 2009

• #3

I want to order from here US - Electronic Components Distributor | Newark.com, but I can not find the part. Where else would I be able to order them from???

 

E

electronspeed

New Member

• Oct 17, 2009

• #4

Ya off course most of the transistors work on 9V.For knowing the maximum value, you should refer to its data sheet. Some common transistors are BC107,SK100

 

audioguru

Well-Known Member

Most Helpful Member

• Oct 17, 2009

• #5

I think the very old BC107 was replaced by the BC547 about 40 years ago and the very old SK100 is available only in India.

Newark sells the 2N3904 little transistor.

 

I

ILikeComputers

Member

• Oct 17, 2009

• #6

I searched for the BC107, but the collector voltage is 50v. Would that still work with 9v?

I just wanted to thank everyone for helping me out(I have not found the right one yet), but I play to buy about 150 of them, I just want to be sure I get the right kind.

 

I

ILikeComputers

Member

• Oct 17, 2009

• #7

would FAIRCHILD SEMICONDUCTOR|2N3904TFR|NPN TRANSISTOR | Newark.com work?

 

audioguru

Well-Known Member

Most Helpful Member

• Oct 17, 2009

• #8

The max allowed collector to emitter voltage of the old BC107 with the base shorted to the emitter is 50V. If the base is not connected then the max allowed collector to emitter voltage is 45V.
Any transistor will work with a 9V supply.

Please post your schematic so we can see if a little transistor will survive the current.

 

I

ILikeComputers

Member

• Oct 17, 2009

• #9

Thanks that would work!