【description】：what are the main factors affecting the service life of aluminum electrolytic capacitors? the time when the electrolyte dries up is the life of aluminum electrolytic capacitor
what are the main factors affecting the service life of aluminum electrolytic
capacitors? the time when the electrolyte dries up is the life of aluminum electrolytic
capacitor. rated service life hours of aluminum electrolytic capacitors. according to the service life hours, aluminum electrolytic capacitors can be divided into: general purpose (normal temperature, within 3 years): 1000 hours; general purpose (normal temperature, hope for a long time): more than 2000 hours; industrial grade: longer life hours.
the main factors affecting the service life of aluminum electrolytic capacitor are as follows:
1: temperature: according to the different electrolyte of aluminum electrolytic capacitor, the maximum working temperature of aluminum electrolytic capacitor can be divided into: general purpose: 85 ℃. general high temperature application: 105 ℃. special high temperature application: 125 ℃. automobile engine compartment: 140 ~ 150 ℃. among them, the number of service hours will be halved for every 10 ℃ increase in temperature.
2: electrolyte: the amount of electrolyte determines the service life of aluminum electrolytic capacitors.
in short, according to the application conditions, the factors affecting the service life of aluminum electrolytic capacitor are as follows: high temperature shortens the service life of aluminum electrolytic capacitor, high ripple current shortens the service life of aluminum electrolytic capacitor, and too high working voltage shortens the service life of aluminum electrolytic capacitor.
the life of aluminum electrolytic capacitor can be calculated according to esr, thermal resistance and ripple current, or according to the relationship between temperature, ripple current and life.
for example, the calculation of aluminum electrolytic capacitor without ripple current working state is basically based on the "10 ℃ rule", that is, the service life is halved every 10 ℃ increase in ambient temperature, and vice versa. this "10 ℃ rule" is applicable under the condition of zero ripple current. it is not necessarily applicable when aluminum electrolytic capacitor flows through relatively large ripple current.
