How to Test MOSFET transistor using Multimeter by some easy methods

In this video, I have explained some methods of checking MOSFET transistor using a multi-meter.
The method is shown here for testing MOSFET is very easy. Here have used Enhancement N-channel MOSFETs (IRF832 and IRFP250N) to explain how to test MOSFET.
I have also explained How to identify the 3 terminals (Gate, Drain & Source) of MOSFET.
1st method:
In the first method, after you have identified the Gate, Drain & Source terminals of MOSFET, you can check the MOSFET in off state by connecting the black lead to the source terminal and red lead to drain terminal in diode testing mode. You should not get continuity between the source and drain at off state for Good MOSFET.
Then you have to charge the gate terminal and check the MOSFET at ON-state.
2nd method:
In the second method, we will check the MOSFET with the help of a simple circuit. I this method we will turn on and turn off the MOSFET and also control the Drain to source current by varying gate to source voltage.
$2 for 1-4 Layer PCBs, Get SMT Coupons jlcpcb.com/RHS
*****************************************
We need your support 🙏🏻 to make Tech StudyCell sustainable.
Help my projects on Patreon: / techstudycell
Feel free to donate any amount: paypal.me/sdaspay
*****************************************
If this video helped you out please don't forget to
Subscribe, give it a Thumbs up and share it with your friends. Thank you very
much for your support!
Find us on Facebook: / techstudycell
Other useful videos -
How to Test Capacitors with and without Multi-meter.
• How to Test Capacitors...
How to make Basic relay circuit and How a relay works
• How to use a Relay in ...
How to make Clap Switch & Music Rhythm LED Flashlight circuit without 555 Timer
• How to make Clap Switc...

[@swaminathan1959]

Brilliant simple to understand presentation. The presenter quickly comes to the point and walks you through the process without wasting any time. A very good gifted teacher indeed!! The minute I finished watching the video I quickly clicked on the "Like" and "Subscribe" button.

[@TWANGROCKS]

Just had a mosfet problem... perfect test solved all questions. thank you!

[@realtoy1]

Thank you for the excellent explanation of how to quickly and easily understand how the MOSFET works and how to test it.

[@LemoToluwe]

I like how you trained us ,you are a good teacher . I understand firmly

[@TechStudyCell]

Thanks for your feedback sir 👍

[@jeanlouisbeniere816]

8d)d-)?d-,s9-9e9ekdk:e)39e)e8)8:jekkske

[@shankaranseshan3263]

Thanks for a good description, looking forward to many such videos

[@TechStudyCell]

Thanks for the feedback...

[@ZafarIqbal-nd3mp]

Good , well explained . Thanks for sharing. Please keep up uploading electronics related videos.

[@raymondlontaan5701]

awesome technique, never in my mind before. thanks for share!

[@TechStudyCell]

You r welcome

[@prakashm1468]

Bro, you did great!!! Straight to the point..and no grammers!!! The explanation on the design of the MOSFET is superb!!!

[@dickr5151]

Excellent video, very well put together by you. Easy to understand with the schematic and the two meters showing the operation of the MOSFET.

[@rainprie2799]

Thank you for your time making this informative video, I am repairing inverter now, this video help me understand the use and how this work.

[@jagdishnawal4080]

Excellent explanation & practical demonstration - cleared many basic doubts - keep making such informative videos - thanks

[@TechStudyCell]

You are welcome

[@PeteHoffswell]

Thank you very much for this fine video. It helped me diagnose 2 out of 4 BS170 MOSFETs bad on my radio.

[@doughunter3967]

thanks for your help friend, this is exactly what i needed to know...Creator bless...doug (canada)

[@marklopez4566]

thanks! make more videos please. It help a lot of people.

[@TechStudyCell]

Sure. Thanks for the feedback

[@fardellp]

Very nice presntation - clearly explained and nicely demonstrated. Probably worth pointing out that the negative lead of some multimeters (particualrly the older analogue meters) have the black lead connected to the POSITIVE of the internal batttery. Also this will only work if the diode test position give a positive voltage of at least 5 V (normally - some may require a higher voltage)

[@jeanlouisbeniere816]

´s8´zke8k3s

[@erksampat9328]

This was so helpful. Thank you so much!

[@TechStudyCell]

You are welcome

[@PBS-nm1uu]

great demo and explanation the best i have seen please do more

[@TechStudyCell]

+PBS #007
Thanks

[@xnatstudio256]

ruclips.net/video/CDd4La5DFx4/видео.html

[@michaelrobert4094]

I agree it was very clear and easy to understand, thank you @tech studycell

[@PurityVendetta]

Thank you, super handy information which I've just used to identify a faulty MOSFET.

[@TechStudyCell]

Thanks for the feedback

[@maxmillangolby]

@@TechStudyCell can u show us P channel also ?

[@MrJamaltp]

Ur demonstration ever ever very usful, and practical &theoritical big thanks

[@TechStudyCell]

Thanks

[@mindhormone]

informative. thanks

[@huaweihuawei-gy8ix]

I was wondering if someone could teach like. Look what I found. Thank you very much. Can you please make some videos about mother board chips the same way thank you

[@modernviewscience6745]

Fabulous! You're a great teacher. Thank you very much!

[@TechStudyCell]

Welcome

[@Anniejoenguyen]

Thanks for the lesson.

[@TechStudyCell]

You are welcome

[@frikkiesmit327]

Helped me to get my brain going again on fets. Im busy to do fault finding on small invertor so now i can make sure wheter my fets are ok or not. Thx for video

[@tomiyourtradesguy6708]

WOW thank you This was perfect and very clear video!!! Love it! Thanks

[@TechStudyCell]

Glad it helped

[@sundars6549]

Well done !
Provided one is grounded properly, preferably with an anti ESD wrap.
Some of these MOS devices get zapped pretty quickly otherwise !

[@TechStudyCell]

Thanks 😊

[@rsattahip]

You've never been to India, there's so much humidity there static electricity is not a problem.

[@leegenix]

@@rsattahip When I accidentally discharged the lead on my failed Motor scooter control unit, I got a large spark. Those Mosfets can store a charge for a long time and more than once. I would short them with a 1,000 Ohm resistor just in case from now on.

[@emmanuelmeyermeyer1083]

Excellent video for checking the mosfets. I am diagnosing a Samsung tv power supply board. Great help. Thanks again.

[@TechStudyCell]

Glad it helped

[@Suresh-bx4rz]

Yes dear, you can have a thumbs up 👍.!!
Simple, clear neat without any doubts 🤗👌

[@opal177]

Very well explained. Thank you.

[@TechStudyCell]

Thanks for the feedback.

[@saiteja.s]

great tut

[@2pist]

Nicely done! I got more out of your 3 minute video than 1 hour of reading. I am going to use your test circuit to match mosfets. So simple! For a given input I can swap mosfets and compare their output. For P channel mosfets I can reverse the polarity. I want to balance them for audio output devices. Thank you!

[@TechStudyCell]

Glad it was helpful!

[@DrkTrx]

Excelent, it helped me a lot!

[@TechStudyCell]

Thanks for the feedback...

[@Yaasiin9600]

Hello my friend I have a question for you when you have only voltage between Gate and the Drain and you test the continuity between source and drain without voltage ! does it beep ?

[@myittarmonclinic]

nice and clear explanation for beginner level , especially for me. Thanks a lot.

[@skg01234]

nicely explained.

[@sanjaykumar-pe6nz]

Gud job .. thanku
And pls explain the characteristics of Power MOSFET

[@rogermathura]

Good video for basic testing. Can you show how to test the maximum current of the mosfet, as per data sheet?

[@MyBlowncobra]

Very good video..simple,easy to understand...

[@TechStudyCell]

Thanks for the feedback...

[@hiddnheiziger]

Thats a real good trick! Thanks for sharing!

[@dhinakaranmahalingam4037]

Thank you man for make me understand

[@TechStudyCell]

You are welcome.

[@leegenix]

@@TechStudyCell Thank you too. I have a better understanding of them thanks to your lecture, clean drawings, and good slow speaking voice.

[@erpa2003]

The best mosfet explanation I seen. Thank you

[@TechStudyCell]

Welcome

[@ELECTRICALTOOLBOXPH]

Great tutorial sir. Simple and easy to understand. Thank you!

[@TechStudyCell]

Thanks

[@iiimusika]

ooh excelent thank you

[@TechStudyCell]

You are welcome...

[@SamSam-tr3eh]

Danke für das schöne Video.
Bitte machen sie für uns noch mehre Videos.
Liebe Grüße aus Deutschland

[@piccadillypainting2826]

I will run some tests but here is my question to confirm my results. by reducing gate voltage you reduce current from drain to source, does this reduce voltage from drain to source also? I assume not. I'm excited to apply these MOSFETs to my project to eliminate bulky relays and have a safe circuit by limiting current. Way cool! I'm still trying to find the most reliable way to have dedicated 6v current to one circuit and 12v current to the other circuit from the same 12v supply. Any advice would be appreciated.

[@MrArcheopteryx]

You are a great teacher my friend! Thank you

[@TechStudyCell]

You are welcome

[@AmirSad]

Thank you for explaining. It was very helpful!

[@mapuiasailo6467]

good video. ive never seen like this video simple and easy. thanks.

[@TechStudyCell]

Thanks

[@toddk9431]

Can I test the transistors 2SK2221 G/S/D when they are still in the amp unpowered of course? They all test 375/1750. Guessing the caps are blown.

[@colutuber]

Thanks for sharing

[@TechStudyCell]

+colutuber
You are welcome...

[@laraz9235]

In your test circuit,can't see how you get a negative reading on your DVM. +ve terminal of DVM is connected to G terminal of Fet (10kpot wiper).If pot set to bottom . Wouldn't it read 0 volts and then only go +ve as pot is increased?

[@980ssbbearcat2]

You are absolutely right.

[@user-bu2nc6zf4u]

Not Complicated Explanation,so i can understand Easily,Keep in going

[@thapsmedia2409]

You nailed it brother. I also have new understanding

[@radiancecaballero7517]

Thank you for the very clear explaination.

[@TechStudyCell]

Welcome

[@jidi2282]

thanks

[@mushtaqmahomed]

Thanks very informative, will appreciate mosfet in laptops how to check them in circuit

[@jamesallen6007]

Excellent tuition. Very easy to understand. Many thanks.

[@TechStudyCell]

Welcome

[@sudhirpatil3434]

Good!

[@robertoleon3784]

Thank you very much for help me.much appreciated,was the best.

[@krisraps]

Damn, THANK YOU For The Video! It DID Teach Me Good Tips ..

[@TechStudyCell]

Welcome

[@migthyjeff8981]

sir if i set multimeter into ohm example X1 or X10 then test the negative pin to source and positive pin to drain are they the same result in diode setting? pls. reply thanks

[@gustavnordin8690]

Thank you fro uploading. Like the explanation. Simple, straightforward!

[@TechStudyCell]

Welcome

[@stingable]

Excellent

[@alibehrouz9833]

well done

[@TechStudyCell]

+ali behrouz
Thank you

[@akhilkr100]

superb session

[@bathurudeendeen353]

Akhil Raj s

[@jelleterpstra65]

Thank u now i can start repair my amplifier i hope only the mosfets are distroid

[@lingeshbabu8556]

super explain sir👌👍

[@pierre7523]

Thanks for the explanation. Helps a lot. I tried to do the same and got the results as you said. BUT, I tried with two types of AVO meter, one (with 3V supply) could do the test and the other with 9v battery could NOT do the test. The reading showed nothing. Could you please explain why? Thanks .

[@tolgadabbagh1877]

very good presentation , thank you ..

[@TechStudyCell]

You are welcome 😃

[@md.anisurrahman1717]

E

[@hichamtassi1753]

very nice and practical video ! can a IRF3710 mosfet replace an FET (SK2543) which has burnt ? thanks !

[@neogeo9965]

Thanks . Simple to the point .

[@TechStudyCell]

Thanks for the feedback.

[@SureshKumar-ct8uy]

@@TechStudyCell V good explanation. Thanks..😊😊😊

[@badshah_pro]

Good video but I have a question, I have a clamp meter 266FT with no diode test mode but it has ohm test labeled 2M, 20K and continuity test labeled 200. Can I use it to test Transistors? Or I should purchase another multimeter

[@malladimurthy3681]

Very good instruction to check mosfet.

[@TechStudyCell]

Thanks

[@kass9722]

thank you sir, but you should explain in some circuit the source & drain are maked I & 0. also some mosfet have no numbers to identify. anyway good video, i subscribe :)

[@bathurudeendeen353]

Kas S ssunnwe

[@denv5221]

By the way, your handwriting is nice and very neat!

[@TechStudyCell]

Thanks

[@surendraprasad351]

Superb

[@pauldobson312]

Excellent, Thank You, very easy to understand!

[@TechStudyCell]

Thanks

[@patrickfarley8036]

Great lesson thanks! But please tell me why a 100 ohm resistor is needed in the circuit and how does one determine what size resistor to use?Thanks very much!

[@leegenix]

In my electronics class, a 100 Ohm resistor is always used at the Base of a transistor in series with the test lead.

[@thogreen]

actually a quite funny way to test them!

[@barichoudhury5591]

Excellent video.Thanks.

[@TechStudyCell]

Welcome

[@britaniohilaw3537]

Thank u for this tutorial & sharing ur knowledge. Keep it up!

[@TechStudyCell]

Welcome

[@roystonsixtus]

Thank you bro excellent tutorial stay safe and god bless 👍👍🙏

[@TechStudyCell]

Thanks for the feedback

[@lucgauthier3201]

Congratulations, very instructive video !

[@TechStudyCell]

Thanks

[@hernandjavines2087]

Nice. Very clear. Thanks.

[@TechStudyCell]

You are welcome 😊

[@jeanlouisbeniere816]

´&829ksisk

[@jeanlouisbeniere816]

9e)398&)el

[@dimuthusampath589]

thank you for this video

[@TechStudyCell]

You are welcome

[@josearmandosanchezvaldez6624]

muy practica la prueba de conduccion del mosfet.....

[@DIlic-iz9tx]

*_BRAVO. Super._*

[@marvinappleby8611]

Good job.

[@TechStudyCell]

+Marvin Appleby
Thank you

[@user-tb1zk7hb5v]

hi from one newbie. i want to test the item sg60n03p.
what should i expect in first and second direction on D S? i see diode between D and S

[@hazllyabmuttalib7074]

Hi bro,i like you explained.simple but perfect...tq bro

[@TechStudyCell]

Thanks for the feedback

[@Swenser]

Is it always that multimitere supplies enough to gate to switch it on, or need to supply higher voltage for some

[@roimark358]

In testing/checking
MOSFETs using Multi-meter, when the gate is charged, why some MOSFETs
(N-channel & P-channel), the drain to source let us say 0.002 or less,
others starts with more higher like 0.435 and running up as fast as a second or
half a second until showing infinite? What does it mean? Does all MOSFETs
behave like that?

[@solewalk]

5:32 The voltmeter is displaying -8.21 V. If the meter was connected between gate and source, it is impossible to show such value. The only possible way for the meter to display such value is when the meter is connected between gate and drain.

[@johndoggett808]

Yes.
The V meter reading goes from -8.24V to +4.86V = 13.1V quite a trick with a 9V battery!
The voltmeter is reading between whatever voltage the variable resistor is set to, and the voltage swing between the 100ohm resistor and the MOSFET.

[@Blue.star1]

Symmetrical supply, +9 0 -9 he didn't show us the picture , battery is hidden

[@johndoggett808]

@@Blue.star1 But there is only one 9v battery in the circuit diagram.

[@Blue.star1]

@@johndoggett808 watch carefully the wiring , may be no 2nd 9v batt. is there, how can we get - v unless he connects reverse measuring across somewhere else , he might have connected reverse as mosfet switches at -5 V

[@johndoggett808]

@@Blue.star1 I agree with Walkalone. When the MOSFET is off, the Meter’s + terminal is at about 0.8v (the Gate (0.8 = 9v - the 8.2v meter reading)). And the negative voltmeter Terminal is at +9V via the 100ohm resistor.
When he turns the gate voltage up to 3.5v (9v-5.5v at 6:06) the MOSFET starts to turn no. After this the negative terminal of the volt meter is on the voltage divider between the 100 ohm resistor, and the partially turned on MOSFET.
At 6:13 he turns the gate voltage to its highest value, and the MOSFET is pulling the negative voltmeter terminal down the 0v, and the positive voltmeter terminal is the gate voltage.

[@razamadaz3417]

I have 6 pins on my laptop mosfet..do they run parrallel to the other side?

[@jamesshimwitwa3206]

I am trying to test a MOSFET using this method. In the ON state, the drain and source show continuity for a very brief duration, like half a second, and then opens again. I am not sure if this MOSFET is faulty of not. Any advise please.

[@elfpimp1]

Cool. I don't suppose there's a way to ID a MOSFET when the numbers are gone is there??

[@tilotamakodam1810]

What is the drain to source voltage and current in on state when 10 volts is given to gate and source terminal

[@ElectronicaVK]

What's the difference between the mosfet health check that I do on my channel and what you do?

[@andrewforrest7633]

hello if mosfet measures a reading of 707 in on state is this normal. you reading shows 004

[@biljartdres2292]

Very nice education ..........Small Question( if POT 10K is zero ohm), how is it possible that you get a negative value on your multimeter??? according to your schematic the testlead are schorted if your 10K resistor is zero ohm ???? isnt this inpossible ? greetings André

[@coloradowilderness3139]

Nice. Go ahead.

[@TechStudyCell]

+colorado wilderness
Thank you for your support.