The rapid development of science and technology makes these electronic products such as mobile phones, TVs, computers, and air conditioners face the society and bring great convenience to our life, which is inseparable from the important components of electronic products—capacitors.
Capacitors are composed of plates at both ends and an insulating dielectric in the middle. They are used to accommodate charges and store energy. One of the electronic components used in large quantities.
In the electronic circuit, there is a box-shaped electronic component with the word CC21 printed on it in red. Those who are engaged in the electronics industry or the capacitor industry can tell at a glance that this is a CBB capacitor.
The full name of CBB capacitor is metallized polypropylene film capacitors, which is a kind of film capacitors. It uses metallized polypropylene film as the medium, and uses non-inductive winding method to wind it into a cylindrical shape, and then wraps it with a flame-retardant material ring. Oxygen resin for encapsulation, has the advantages of non-polarity, high temperature resistance, small size, wide capacity range, high insulation resistance, and good self-healing properties, and is widely used in electronic products.
Film capacitors are divided into different film capacitors according to different categories, such as polypropylene film capacitors, polyester film capacitors, polystyrene film capacitors, etc. according to dielectric materials. Different film capacitors have different categories, different capacitances, and different volumes. Common CBB capacitors include CBB13 capacitors, CBB20 capacitors, CBB21 capacitors, CBB21X capacitors, and CBB81 capacitors.
Introduction to common film capacitors
CBB13 capacitor
CBB13 capacitors: high-voltage polypropylene film capacitors, non-inductive structure, due to strong over-current capability, high insulation resistance, good moisture resistance, excellent frequency characteristics, etc., even at high frequencies, the loss is extremely small, suitable for high frequencies circuits, high voltage circuits, DC and pulsating circuits.
CBB20 capacitor
CBB20 capacitor: axial metallized polypropylene capacitor, non-inductive structure, has the characteristics of low high-frequency loss, strong over-current capability, high insulation resistance, etc., can be used in high-current circuits, widely used in high-current circuits, frequency conversion and frequency division In large pulse circuits, especially in hi-fi frequency divider circuits.
CBB21 capacitor
CBB21 capacitors: CBB21 capacitors are also called metallized polypropylene film capacitors. Metallized polypropylene film is used as the dielectric, the metal evaporation layer is used as the electrode, and tinned copper-clad steel wires are drawn out as wires for non-inductive winding. The exterior is flame-retardant. Epoxy powder encapsulation. Strong moisture resistance, high insulation, low high frequency loss, high reliability, good self-healing, low dielectric absorption, wide operating temperature range. It is widely used in filter circuits, pulse circuits, resonant circuits and coupling circuits, and is often used in filter circuits and coupling circuits.
CBB21X capacitor
CBB21X capacitors: CBB21X capacitors use metallized polypropylene film as the dielectric. Because the volume is smaller than that of CBB21 capacitors, it can be said to be a reduced version of CBB21 capacitors. It has the characteristics of high insulation resistance, moisture resistance and self-healing properties. CBB21X capacitors can be used when CBB21 capacitors are not available. CBB21X has small size, good moisture resistance, excellent electrical performance, good self-healing performance, wide operating temperature range, and excellent frequency characteristics.
CBB81 capacitor
CBB81 capacitors: High-voltage metallized film capacitors, adopting an internal series structure, have the characteristics of low high-frequency loss, strong over-current capability, high insulation resistance, and long service life. They are mainly used in DC, AC, and high-current pulsating circuits. Frequency conversion Device surge absorption, IGBT protection and other circuits.
The following points should be considered when purchasing capacitors;
Choose to have safety certification
Safety capacitors are different from other capacitors. Safety capacitors have safety certification. Safety certification is a kind of certification in my country to protect consumers’ personal and property protection. Safety certification includes German VDE, South Korea KC, American UL, European Union ENEC and my country’s CQC.
Only capacitors certified by safety regulations are real safety capacitors. Capacitors without safety certification are not real safety capacitors. When purchasing safety capacitors, pay attention to distinguish whether they have safety certification.
Screen printing parameters
There are printed words on the body of the safety capacitor. These printed words are the general parameters of the safety capacitor. You can choose the appropriate safety capacitor according to the silk screen parameters. If you don’t know the silk screen parameters, you can provide the working voltage and application of the safety capacitor to be used. Consult relevant practitioners or engineers.
Shop around and choose the best
When purchasing safety capacitors, you can first select the manufacturers of safety capacitors. Just like shopping in ordinary times, you must first shop around and choose manufacturers with good export reputation, excellent quality and good after-sales service. Good safety capacitor manufacturers will provide you with suitable solutions according to your needs.
The above are some points to pay attention to when purchasing safety capacitors. Besides, there are other points worth noting. Welcome to leave a message and exchange and learn together.
