BP Axial Non polar Aluminum Electrolytic Capacitors are made with an aluminum cylinder as the negative electrode, filled with a liquid electrolyte, and a bent aluminum strip inserted as the positive electrode.
BP Axial Non polar Aluminum Electrolytic Capacitors have a wide range of applications. In addition to the audio and signal processing fields, they can also be used in power electronics and industrial control, new energy and automotive electronics, and general circuit design. However, few people know about the service life of BP aluminum electrolytic capacitors.
First, it is important to confirm that aluminum electrolytic capacitors(Bipolar Electrolytic for speaker) will definitely fail, it is just a matter of time. There are many factors affecting the lifespan of capacitors(Bipolar Electrolytic Capacitors for Crossovers), including high temperature, overvoltage, reverse voltage, rapid charge and discharge, and so on.
Under normal use, the greatest influence is temperature—the higher the temperature, the faster the electrolyte volatilizes. It should be noted that the "temperature" here refers to the operating temperature of the aluminum foil, not the ambient or surface temperature. Manufacturers typically mark the capacitor's lifespan and test temperature on the capacitor body.
Since the lifespan of a non-polarized Bipolar Aluminum Electrolytic Capacitors is halved for every 10°C increase in operating temperature, do not assume that an aluminum electrolytic capacitor with a 2,000-hour lifespan is better than one with a 1,000-hour lifespan; pay attention to confirming the test temperature for the lifespan. Each manufacturer has a calculation formula for temperature and lifespan, which should be referenced with actual data during capacitor design.
Life Expectancy Estimation: The continuous operating time of an electrolytic capacitor at its maximum operating temperature.Lx=Lo*2(to-ta)/10
Lx = Actual operating lifespan
Lo= Guaranteed lifespan
to= Maximum operating temperature (85°C / 105°C)
ta= Actual ambient temperature around the capacitor
Example: Specification: 105°C / 1,000 hours
Lifespan estimation at 65°C:Lx=1000*210(105−65)/10=8000 hrs
Actual operating lifespan: 8,000 hrs
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WEE Technology Published on May 30, 2025
