How to Easily Detect a Failed Capacitor

How to Easily Detect a Failed Capacitor

In this video, I talked about 3 types of failure in the electrolytic capacitors and how to detect them. You might need a benchtop multimeter or an LCR meter to detect all failure types. Watch the video from start to end.

[tombanes]

Do the high voltage capacitors in a microwave contain any fluid that can leak out when defective? I have seen the electrical capacitors you show in your video burst and leave a fiber material all around it . The one in the microwave has a pool of clear oily liquid that smells like 3in1 oil right under the capacitor and is spread along the entire channel that serves as the rear feet of the microwave. The microwave works but I find this very odd. No one mentions oil as common problem with the capacitors. In fact they say they are dry. Any thoughts?

[ridjonful]

Another way to check if the electrolytic cap is defective is by checking the pins under it. If it looks like rubber part at the base has cracked on it, it is already dried. If there some kind of white excess of internal chemical paste that leaked out from the pin terminal, again, it is also dried.

[RuneTheFirst]

Most people only check ESR today, which can fool them with shorted caps. Leakage causes more problems than anything else but is seldom considered. I have rescued many items others had given up on because of this.

[I_SuperHiro_I]

What about ceramic capacitors? I’m currently struggling to find the cause of low grid current in a vacuum oscillator induction furnace and it’s driving me nuts. All of the caps measure fine disconnected, chokes are fine, resistors fine, no shorts I can find. Only thing I can think of is capacitor failure under load (which I thought was extremely rare) or a bad signal transformer on the RF Furnace board.

[Yorumcu]

Nice video .Coud you make a video about"How understand "Capacitor's leaguge problem"?

[seanboyle]

Please could somebody advise me I have a board with a 47uf 16v capacitor but it’s showing 197uf, I can’t find any video to explain a higher reading, is it a good one holding lots of charge or bad one? Please someone help as I have a problem with the board and this is the only thing I can find wrong

[havwin]

At :40, ..what the heck does "like this" mean?

[danielchatrie]

NoT currently right i built a buck converter and i use a 3300uf blue coler amplifier capacitor the current storge was very large and i get 21 amp easy from it but i use another 3300 capacitor nichicon caps it test good on my caps tester and i get zero amp storage from it so u dont know that there or 3 type of ekectrical caps filter caps that hold high current and smb caps that dont how enery just act as low pass filter for clearing frequency repple and high frequency caps for enery delay

[StAlKeRsification]

Heat on top of cap producing sound if it work fine then its faulty

[billmoran]

Even easier, if it is a through hole type on a PCB it’s old and probably bad. Just replace it.

[lenslens]

Sometimes it show a good value but high ESR

[mawkuri]

my capacitors is 2200uf but it shows 4000+ uf.

[ChristieNel]

Electrolytics are the worst components ever! We really should invent an alternative to high capacity capacitors.