Exploding Polarized Capacitors - Causes and Mechanisms

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SUMMARY

Polarized capacitors can explode due to excessive voltage, incorrect polarity, or internal failures such as short circuits. In the discussion, a 1000 µF, 16V capacitor exploded when subjected to 15V, indicating that even voltages close to the rated limit can be dangerous if the capacitor is aged or damaged. The mechanisms behind these failures include overheating, steam production, and electrolysis leading to hydrogen gas formation. The phenomenon known as "capacitor plague" can also contribute to premature failure.

PREREQUISITES
  • Understanding of polarized capacitors and their specifications
  • Knowledge of voltage ratings and polarity in electronic components
  • Familiarity with the effects of aging on capacitors
  • Basic principles of electrolysis and gas formation in electrical components
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  • Research the "capacitor plague" and its impact on electronic components
  • Learn about safe operating limits for polarized capacitors
  • Investigate methods for testing capacitor health and performance
  • Explore the thermal dynamics of capacitors under load conditions
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Electronics engineers, hobbyists working with capacitors, and technicians involved in troubleshooting and repairing electronic devices.

DaTario
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Hi All,

I would like to know what makes a polarized capacitor to explode. Too much voltage? Tension in the wrong direction? What is the mechanism behind. I have exploded accidentally one of those capacitors with plastic cover, with 1000 mu farad and 16 V. The voltage I put was 15 V.

thanks in advance

DaTario
 
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A short causing heating and production of steam, or even electolysis and production of
hydrogen. An old capacitor might short below its rated voltage.

you could have a capacitor affected with this:

http://en.wikipedia.org/wiki/Capacitor_plague"
 
Last edited by a moderator:
thank you.

best wishes

DaTario
 

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