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车载电子设备中铝电解电容性能需求一览表
2026-06-03
总结与选型建议耐压（WV）： 安全第一。选择额定电压高于实际工作电压的1.2-1.5倍，并考虑电压尖峰。容量（C）： 满足电路对储能和纹波抑制的基础需求。在开关电源中，有时可以用更低ESR来弥补一定容量的减少。ESR & 纹波电流： 性能与可靠性的核心。它们是导致电容自发热（温升ΔT） 的直接原因。高温是铝电解……
What materials are needed for electrolytic capacitors
2019-03-07
Electrolytic capacitance is a kind of capacitance. Metal foil is the cathode (aluminium or tantalum), and the oxide film (alumina or tantalum pentoxide) which is close to the metal is the dielectric. The cathode is composed of conductive material, electrolyte (electrolyte can be liquid or solid) and other materials. Be……
How to Identify Positive and Negative Electrodes in Electrolytic Capacitors
2019-03-07
First, take out an electrolytic capacitor. The first method is to look at the electrolytic capacitor hose. The end of the hose is marked with a negative electrode. The other end of the positive electrode is not indicated. The second method is to look at the electrolytic capacitor pins. One end with a grid at the pin re……
How to detect the electrolytic capacitor?
2019-03-07
he operation of electrolytic capacitor detection is as follows:
Turn the multimeter to R × 1k block, and connect the two test leads to the two wire ends of the capacitor. Pay attention to the swing of the hands.
When the normal capacitor is detected, the hands first swing to the right with a large amplitude, and then……
What are the categories of electrolytic capacitors?
2019-03-07
Electrolytic capacitors are divided into the following types:
1. Bolt type aluminum electrolytic capacitor, the bolt type belongs to high voltage and high capacity, the voltage is between 200-700V, and the capacity is 1800uf-33000uf.
Validity period of electrolytic capacitor
2019-03-07
The capacitance of the liquid electrolyte is mainly a trace amount of water in the electrolyte. This moisture is used to be electrolyzed to hydrogen and oxygen when the aluminum electrode has insufficient pressure, and then the alumina electrode increases the compressive strength. There is still a very small gap around……
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