Identification of Surface mount Aluminum Electrolytic CapacitorsSurface mount aluminum electrolytic capacitors are naturally made of aluminum for both the positive and negative electrodes, which contain liquid electrolyte. The positive electrode is also made of a curved piece of aluminum material. After undergoing direct current voltage treatment in the production process, a layer of oxide film is formed on the positive electrode sheet as a dielectric. Its characteristics are large capacity, but high leakage, poor stability, positive and negative polarity, suitable for power filtering or low-frequency circuits.Aluminum electrolytic capacitors are labeled with both capacity and rated operating voltage, which are important parameters for selecting capacitors.In the actual selection of aluminum electrolytic capacitors, larger capacitors should be used for areas with fast current ...

Current situationThe challenges faced by the first surface mounted aluminum electrolytic capacitorSince the 1980s, when surface mount electrolytic capacitors were flourishing, some people had doubts about the prospects of capacitors, but over time, these doubts have been dispelled. Since the mid-1980s, the annual average growth rate of the capacitor industry has been above 20%, and by 1993, the global sales value of capacitors had reached 13 billion US dollars. The sales value of surface mounted aluminum electrolytic capacitors accounts for more than one-third of the entire capacitor industry. However, with the advancement of electronic technology and material manufacturing processes, traditional aluminum electrolytic capacitors are not only under pressure from the development of electronic technology, but also face challenges from other types of capacitors. Opportunities f...

Surface mount aluminum electrolytic capacitors have evolved from DC to AC, from low temperature to high temperature, from low voltage to high voltage, and from universal to special types to meet demand. What exactly is temperature change rate?Temperature change rate, also known as "temperature change rate". Refers to the temperature change value per unit length in any direction along an object. For a scalar. The commonly used mathematical symbol "t/x" represents the unit of "℃/m". Its mathematical definition is: where Δ x is the distance (m) between the isothermal surface t+Δ t and the isothermal surface t in a certain x direction; Δ t is the temperature difference between the two (℃).The lifespan of surface mount electrolytic capacitors is related to temperature, and the lifespan of surface mount electrolytic capacitors will decrease under hi...

 The withstand voltage of surface mount aluminum electrolytic capacitors refers to the working voltage they can withstand continuously under certain conditions. If the operating voltage on the circuit exceeds the rated voltage of the surface mount aluminum electrolytic capacitor, the insulation medium inside the capacitor may be broken down, which may slightly affect the short circuit or leakage of electronic products, and in severe cases, it may directly burn out the entire circuit board. So, the working voltage of surface mount aluminum electrolytic capacitors cannot exceed their rated voltage, which not only extends their lifespan but also ensures the reliable operation of the circuit.When purchasing or using surface mount aluminum electrolytic capacitors, it is necessary to conduct this withstand voltage test on them. The performance of surface mount aluminum electrolytic c...