How to check the condition of the MOSFET - Fareedish's Blog

Back when I first got to know MOSFETs I was confused, how do I know if it's still good or is it broken? Use a multitester even if the result is that the needle does not move at all. But when searching on the internet says that a good MOSFET when tested using a multitester the needle does not move. 

But that statement doesn't make me necessarily believe it.

After learning how it works now I know how to test it, there are two ways we can do it, first using an analog or digital multitester and the second practicing it directly with the help of a little component.

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Just look at the following method.

The first way:

1. Set up an analog or digital multitester.

2. Set the selector on the X10 scale on the analog multitester while on the multitester set the selector on the "Diode & continuity test".

3. Connect the negative(black) probe to the drain(D) time of the MOSFET.

4. Connect the positive probe(+) to the foot of the source(S) MOSFET.

5. In positions 3 and 4, touch the foot gate(G) of the MOSFET and the foot drain(D), then the needle will slightly move to the right and stop at a scale. 

Even though it has been released, when it is tested again, the needle immediately moves to that scale and maintains its condition until the static electricity is removed.

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How to eliminate the effects of static electricity on the MOSFET.

1. Do steps 3 and 4 above.

2. Remove step 4, then connect the red probe(+) to the gate(G) leg then the static electricity will disappear.

finish.

If the above steps are met then the MOSFET is in a "good" state.

This method applies to all N-Channel MOSFETs such as IRF630, IRF640, K10A60 etc. 

The second way:

For this second method, you only need additional components LED + resistor and battery.

For the reading of the foot the MOSFET starts from the left, namely Gate(G), Drain(D) and Source(S).

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Here's the scheme .

Test by touch .

Scheme tests mosfet .

For more details, see the video below: