Real vs Fake MOSFET | How to identify a Fake Transistor? | MOSFET Test

How to measure “drain-source on resistance” in order to identify a fake MOSFET Transistor. Do this test for your MOSFET and compare it to the datasheet.

[rainmakerscustomsrainmaker]

Nice and simple. we need more videos like this. just small bits at at a time is easer to absorb

[chrisrishermn]

I used your method to test some MOSFETs and it made me look like a fool. The gate did not get fully turned on by touching drain and gate together. I complained about MOSFETs being defective because I calculated Rds without turning the gate on enough. One should run a separate wire from the power supply + to the gate lead (it should be at least 3v above power source voltage) while testing to get accurate Rds measurements.

[galvanaut]

Great info. One correction: The current will decrease slightly with each MOSFET in the circuit, thus the resistance calculations will end up slightly higher. You need to measure the current separately for each MOSFET and then apply Ohm's Law.

[multitechservicepoint]

Very important information for a technician, thanks you

[sidewinderamm]

I am both very glad I found this video, and at the same time sad. Looks like I will need to order from reputable websites from now on.

[rushilshah]

Good Video 👍 Please make a video on Dual Axis SOLAR TRACKER Project !!

[NigelTolley]

That's absolutely amazing! They must be saving a few tenths of a penny at best!

[qaisarawan]

great video . also make a video about measruing the Cd capcitace to check authenticity

[dushyantverma]

Now i know why my h bridge shorted my powe r supply every time

[mancave]

Both Drain current and Vds should be measured at the same time. The voltage drop Vds can affect the Drain current unless a constant current source is used.

[AIexanderHartdegen]

The Source Drain resistance varie according to the voltage from the gate. You can found different value according to this. Minimal is 3, 5, but if 20 volts are applied you can divide this resistance.

[jeit]

A simple wire tester showed me gate and drain are conducting, much brighter led than real one, bought that very 540n last month from my trusted shop !

[electrojessy]

Oke ty i have the fake ones on order 🙁 but are they stell good fore little amp ratings? Like 5 a at 24 at max? Im using a heatsink on it

[manofmesopotamia]

so since the the voltage is low that means high current and low resistance (ohms law)

[wmpx]

Same here, from 3 different local dealers...

[skibidilasthope.z]

I have fake mosfets but they work great

[keving]

What do you suggest buying authentic solid state devices?

[alexchan]

Hi Electrical Projects, I just stumbled your channel and I have to say I'm really fascinated by your quick tutorials towards building miscellaneous electrical parts as a guide for someone like me who doens't know squat about such areas of composition. I'm just wondering how would you create a device for turning something on and off, and on and off again in a sequence at specific time intervals? And could you possibly create a video for such a device?

[alasdair]

Another good test is to recognise the source... not as in source pin but supplier source.
Pretty well 100% of devices coming from Ali, or Chinese Ebay sites especially those masquerading as local etc are fakes.. but from places like RS, Farnel etc... 100% genuine.

[kumaravinash]

Now I know why my some devices blasted