How to check NPN transistors

Do you have a NPN transistor and you are not sure how to test it? I will show you a simple way on how to test your NPN transistor with a multimeter. After you follow how to test a NPN transistor, you will know if you have a good or bad NPN transistor. You will also know how different NPN transistors packages look like. You will also know how a transistor work.

[@lornespry]

A most excellent presentation. Very clear and beautifully presented.

[@mariofilippi3539]

I can now test transistors with confidence after watching your informative video, thank you.

[@FF-es6nt]

Bravo from France. So clear, good explanation and practice👍

[@uziroz]

EXCELLENT and simple explanation - Thanks

[@MuhammadAbdullah-gi4kt]

That's great! Please make videos with others components of electronics. Thank you so much for your helpful job, just keep it up.

[@thirunavukarasushanmugeshw535]

It's very helpful 👍 Thanks

[@navira920]

Well Mate Ihave To say its Great.Its better Then in The Collage 60 Min Only To explain. And Here 4:36 And You a Pro.Thanks Alot Its Greatful

[@wallybe2946]

Awesome Video Thank-you for your time and effort

[@kirkdegler6516]

Thanks. Helped me verify the 2SC2555 from my PP-7B power supply is good.

[@timrogers6731]

Most helpful video I could find

[@marty3553]

Brilliant video thanks bud

[@acuramandan]

Definitely helped me review. Thanks!

[@francisdsa6790]

Best demonstration appreciate thanks 🙏💐👌👍

[@janplexy]

FINALLY UNDERSTOOD!

[@navidmafi]

thanks , very nice video

[@aloisiolopesdesouzasouza5378]

Muito bom trabalho , grato

[@hanahawlokam351]

Grait video😍 Thanks😊

[@Bianchi77]

Creative video,thanks :)

[@Lcs274]

Ssuuppeerrbbb Thanku

[@hakank3841]

great video! thanks a lot

[@electronictech785]

Glad you liked it!

[@aeroboy002]

thanks, super. very very goood teaching............ from india

[@electronictech785]

Thanks and welcome

[@mankeil4468]

3/10 Needs more hand animation

[@user-2uf2kr2c]

Hi, is this method for the transistor on the board connected to the battery or desoldered? Regards

[@denisprudhomme8169]

thank you,,,very good explanation,,

[@SineEyed]

When testing an unknown BJT, the base pin (of both NPN and PNP) is easy enough to determine; but how do we distinguish which pin is the collector and which is the emitter?..

[@mankeil4468]

Usually, just use the part number to search up the datasheet. If it doesn't have a part number you really can't even know if it's a transistor or something else (as the same kind of packages are used between a variety of components)

[@carlosgaspar8447]

one voltage drop should be slightly different from the other (google search).

[@serviteccompletojimenez8995]

So, collector and emitter are giving me lecture (both positions), and I have a question, is it common that these type of of transistors manage the signal of 12 volts that activates the relay in order to make a motor work? By the way I already tested the relay and it is ok, but no 12v signal, suspicious #1 NPN transistor!

[@mahasaravana1169]

Kindly post video for PNP transistor also

[@davidnguyen5028]

OL is for open line

[@yaseenhashim8538]

Awesome excellent thanks beautiful way

[@spacex2323]

Top

[@kychemclass5850]

Isn't it the current through the base of a BJT that matters, whereas MOSFETS its voltage?

[@spark69jols]

Sir can I ask what kind of smd Transistor with yhe marking of

[@spark69jols]

Marking of NB AB

[@briang.7206]

Get an M tester they cost about $7 to $10. It can test transistors and lots of other things.

[@paolod853]

Wow

[@mikegaskill6347]

make it so, you can read the multimeter to see what the diode setting is...for those that are not multi meter savy. please

[@Pumpkin_Fart]

WHY the 0.3V to 0.7V? Why these two min and max readings?

[@shyammohabir8283]

isn't one test is missing - Black Led on Base and Red on Collector and Multimeter should give you an "OL" Over limit reading

[@FlannelGuy_1978]

Very Informative Thank You -- This video was a bit slow, so i set playback at 2X Speed -- much better!

[@James_Bowie]

Writing/typing out each letter at a time is time wasting and annoying. Just print the line and get on with it!

[@Ocean_breezes]

Agreed. After watching for 15 seconds, I had to exit the video

[@lornespry]

For some us morons like me, the rubbing out gives us time to absorb and try to put things into long term memory.

[@sainicomputers61]

Worst backround sound

[@Pumpkin_Fart]

What is with the fake drawing? It's off-putting. Are you "Thing" from the Addams Family?

[@Pumpkin_Fart]

Don't forget to mute your tv

[@victorysonics6564]

Painting makes it painful to watch. Waste of time.

[@raptorswire7212]

you know why nobody does the hand drawing animations like this? Because it is annoying...original, but not useful in a tutorial really

[@sunshinetorricelli1317]

Worse tutorial ever.

[@lornespry]

For some of us, this pedestrian approach is exactly what we need. And of course, you didn't need to watch it.