Electrolytic Aluminum Capacitor 680uf 16v Good Electrical Performance​

Small Size 16V 680UF Aluminum Electrolytic Capacitor Good Electrical Performance​

Aluminum electrolytic capacitor is a polarized capacitor. Its positive plate is made of aluminum foil, which is immersed in the electrolyte for anodic oxidation treatment. A layer of aluminum oxide film is formed on the surface of the aluminum foil, and its thickness is generally 0.02~0.03μm . This layer of oxide film is the insulating medium between the positive and negative plates. The negative electrode of the capacitor is composed of electrolyte, and the electrolyte is generally composed of boric acid, ammonia water, ethylene glycol, etc. In order to facilitate the manufacture of capacitors, the electrolyte solution is usually impregnated on a special paper, and then a piece of original aluminum foil is pasted together with the paper soaked in the electrolyte solution, so that the negative electrode can be easily drawn on the original aluminum foil strip, such as Figure 1a shows. The core of the aluminum electrolytic capacitor is formed by winding the above-mentioned positive and negative electrodes according to their central axis, and then the core is enlarged and packaged in an aluminum shell to form an aluminum electrolytic capacitor. In order to keep the electrolyte solution from leaking or drying up, a rubber plug is used to seal the mouth of the aluminum case.
In order to obtain a large capacitance and a small volume, chemical etching is used to form a rough surface on one side of the positive aluminum foil, so that the surface area of the electrode is increased, thereby increasing the capacitance.
 

Features
 

1. The capacitance per unit volume is very large, dozens to hundreds of times larger than other types of capacitors.
2. The rated capacity can be very large, and can easily reach tens of thousands of μf or even several f (but it cannot be compared with the electric double layer capacitance).
3. The price has an overwhelming advantage over other types, because the components of electrolytic capacitors are all common industrial materials, such as aluminum and so on. The equipment for manufacturing aluminum electrolytic capacitors is also common industrial equipment, which can be mass-produced and the cost is relatively low

Temperature characteristics:

Measurement Impedance at +20 ±2°C, 1,00kHz ±20%
Measurement Impedance at -25 ±2°C, 1,00kHz ±20%
Measurement Impedance at -55 ±2°C, 100kHz ±20%
Impedance ratio of the -25 and -55°C values to the +20°C value shall be not exceed the following values