381EL391M250H452

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Aluminum electrolytic capacitors are widely used in many electronic products, such as audio and video devices, automobiles, industrial equipment and other equipment. The specific model is marked on the capacitor, and the three codes of 381EL391M250H452 are the product model of aluminum electrolytic capacitors.

According to the model code of 381EL391M250H452, 381 is the marking of the company brand, EL is the tube type aluminum electrolytic capacitor, 391 is the rated voltage, M is the electrolyte mark, 250 is the capacitance code, H is the tolerance value and 452 is the size.

In general, 381EL391M250H452 represents a 25V aluminum electrolytic capacitor with radial leads and a tolerance of ±20%. The electrolyte is manganese dioxide. The nominal electrolytic capacitance is 391uF, the size length and width are 45.2mm. The lead spacing is +2.5mm or -0.5mm.

The working principle of aluminum electrolytic capacitors is based on the formation of an oxide film on the surface of a special aluminum foil. The oxide film acts as the dielectric medium. The anode terminal of the capacitor is connected to the aluminum foil to form a capacitor, and the negative terminal is connected to the end of the capacitor. The output voltage is determined by the capacitance value. When the input current passes through the capacitor, some energy will be stored in the capacitor, and the stored energy will be released when the capacitor is temporarily short-circuited.

Aluminum electrolytic capacitors are suitable for oscillator, power supply filtering, frequency divider, timer, power amplifier and instrumentation coupling in electronic products. The 381EL391M250H452 has a wide range of application fields. Generally speaking, it is mainly used in the filtering of power supplies, voltage ripple filtering and energy accumulation of electronic instruments.

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