how to check capacitor polarity with multimeter

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If you’re like me, you’re always searching for ways to make life just a little bit easier. And if you’re looking for an easy way to check capacitor polarity, look no further than your trusty multimeter!

Tools and Materials

You will need a few tools to check capacitor polarity:

-A digital multimeter
-A capacitor of unknown polarity
-A lead with alligator clips or banana plugs on each end


Before checking the polarity of a capacitor with a multimeter, it is important to discharge the capacitor. This can be done by connecting a lead from the negative (-) side of the capacitor to a good ground and then touching the positive (+) lead of the meter to the positive side of the capacitor for a few seconds.

Once the capacitor is discharged, set your multimeter to its ohmmeter function and touch the leads to the respective terminals of the capacitor. If the meter reading changes from infinity to a low resistance value and then back to infinity again, this indicates that the capacitor is polarized correctly.


If you’re using a multimeter to check the polarity of a capacitor, there are a few things to keep in mind. First, make sure that the multimeter is set to the correct setting. Second, touch the probes to the correct terminals on the capacitor. The red probe should touch the positive terminal, and the black probe should touch the negative terminal. Finally, observe the reading on the multimeter and note whether it is positive or negative.


Before checking the capacitor with a multimeter, be sure to discharge it completely. To do this, short across the leads with a wire or screwdriver. A capacitor can hold a charge even if it hasn’t been used in years, and that charge can give you a nasty shock.

Some capacitors are polarized, which means that they can only be installed in circuit one way. To test for polarity, check the leads with your multimeter set to ohms. If the multimeter beeps or the needle moves, the leads are not reversed. If there is no movement on the meter, reverse the leads and try again.

Things to Remember

When working with capacitors, there are a few key things to keep in mind in order to avoid damaging the component or injuring yourself.

Further Reading

If you want to learn more about capacitor polarity, check out the following resources:

-How to Check Capacitor Polarity with a Multimeter
-How to Test a Capacitor With a Digital Multimeter
-Capacitor Polarity and Voltage Rating

Related Videos

How to Check Capacitor Polarity with a Multimeter
Most capacitors have their polarity markings clearly labeled on the exterior, but if you come across one that doesn’t, you can check its polarity with a multimeter. The process is simple: just connect the probes to the leads of the capacitor, and check which way the meter reads. If it reads positive, then the lead on the right is positive; if it reads negative, then the lead on the left is positive.

Related Blog Posts

Assuming you have a capacitor and a multimeter that can measure capacitance, you can check the polarity of a capacitor using the following steps:

1. Connect the positive lead of the multimeter to one of the capacitor leads.
2. Connect the negative lead of the multimeter to the other capacitor lead.
3. If the reading on the multimeter is positive, then the first lead you connected is positive and the second lead is negative. If the reading onthe multimeter is negative, then the reverse is true.


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