How to prevent the explosion of electrolytic capacitors

How does an electrolytic capacitor fail?

The vast majority of electrolytic capacitor failures are caused by one or more of the following mechanisms: dry-out of the electrolyte, loss of adhesion between the electrode and electrolyte, corrosion of the electrode, or breakdown of the dielectric.

Can electrolytic capacitors explode?

Electrolytic capacitors are the most likely type to explode compared to other capacitors. While other types may burn, crack, pop, or smoke, electrolytic capacitors can cause a spectacle due to their construction.

Why are buyers cautious about electrolytic capacitors?

Buyers are now extra cautious about the durability and lifespan of electrolytic capacitors because of the past challenges with electrolytic capacitor degradation. Capacitor failure modes introduce issues in a PCB and can be detrimental to the entire circuit.

What causes a capacitor to explode?

Reverse Polarity is the most common cause for a capacitor to explode. This occurs when polarised components, like electrolytic capacitors, are wired incorrectly in a circuit.

How does a high operating temperature affect an electrolytic capacitor?

High operating temperature is a catalyst to electrolytic leakage or vaporization, leading to a decrease in capacitance and an increase in equivalent series resistance (ESR). As ESR increases, there is intensified self-heating in the electrolytic capacitor, and the same gets accelerated with the application of ripple currents.

What is an electrolytic capacitor?

An electrolytic capacitor will often be required to supply large levels of ripple current in applications like smoothing capacitors in a power supply. Make sure the capacitor can handle the current demand. Ensure that the capacitor is operating within its current limitations and is not getting too warm while in use.