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250V~450V Rated Voltage And 1-35uF Capacitance CBB61 Fan Sh 40/70/21

250V~450V Rated Voltage And 1-35uF Capacitance CBB61 Fan Sh 40/70/21

250V~450V Rated Voltage and 1-35uF Capacitance CBB61 Fan sh 40/70/21 Product character CBB61 uses polypropylene film (thickened by Zinc and Aluminum) as a medium,fill Flame-retardant epoxy resin into square ABS/plastic case. It is small volume, reliable and safe, stable performance and long...

250V~450V Rated Voltage and 1-35uF Capacitance CBB61 Fan sh 40/70/21

Product character
CBB61 uses polypropylene film (thickened by Zinc and Aluminum) as a medium,fill Flame-retardant epoxy resin into square ABS/plastic case. It is small volume, reliable and safe, stable performance and long life.Widely used for fans and ventilators.

Protuct Show

675

全图_副本

Technical Data

1532346882(1)

Dimensions / Round

1532346954(1)

The reasons that affect the capacitance life of metallized film
The capacity of metallized film capacitors is determined by the area of the film metal layer, so the main reason for the decrease of capacity is that the metal coating is affected by various external factors and the area is reduced. Generally, there are three main reasons influencing the service life of metallized film capacitors:
1. High voltage.
2. High frequency. (high frequency, high dielectric loss, thermal breakdown)
3. High ambient temperature.


Metallized film capacitors are metallized dielectric capacitors which are directly coated with a layer of metal film as an electrode. Since the electrodes are metal films coated in steam, they are much thinner than mechanically made aluminum foil. This capacitor is characterized by its self - healing properties. If the voltage is so high that a point in the capacitor's internal medium is broken, the short circuit current will cause the metal film at the damaged medium to evaporate. Even if the metal film capacitor has self-healing, if the breakdown range is too large, it will affect the capacitance of the capacitor, which will also affect the life of the capacitor.


In the process of capacitor manufacturing, there is a small amount of air between the film layers, which is difficult to completely eliminate. Therefore, when the capacitor is working, the air may be ionized under the action of electric field. Ozone is produced after air ionization. Ozone is an unstable gas, which is divided into oxygen by itself at room temperature. It is a strong oxidant, which can be instantly oxidized at low concentration. The metal coating of the metallized film capacitor is oxidized immediately after meeting the oxygen of ozone, which generates transparent and non-conductive metal oxides, resulting in the decrease of capacitor capacity. Therefore, reducing the air between the film layers can slow down the decline of capacitance. When the air between the film layers is invaded by external water, the breakdown potential of the air will be reduced, and the ionization of the air will be increased upward, resulting in a large amount of ozone. The metal coating of the metallized film capacitor will be oxidized, and the capacity of the capacitor will be rapidly reduced.

Advantages of our ProductsHigh quality with competitive price

Produce capacitor more than 20 years, rich experience

Well-equipped, can roll film with 3 cores
Can be customized according to customer requirements
Professional customer service1 year warranty with technology support

Comparison of advantages and disadvantages of metal film capacitance
Metal film capacitor is a layer of metal film directly evaporated on the paper as an electrode, also known as metallized paper capacitor, the electrode is evaporated on the metal film is much thinner than aluminum foil, the characteristics of this capacitor is self-healing. If the voltage is too high, so that the capacitor internal medium is a point of breakdown, short-circuit current will make the medium damage of the metal film evaporation, so as to avoid short-circuit between the two poles, so that the capacitor continues to work. Of course, the breakdown range should not be too large, otherwise it will affect the capacitance of the capacitor. Metal film paper capacitors are usually encapsulated in epoxy resin, so they have good moisture resistance.


In principle, there is no short-circuit failure mode in metal film capacitors, and there are many short-circuit failures in foil capacitors. Although metal film capacitors have the above great advantages, they also have disadvantages compared with foil capacitors:


1. Capacitance stability is not as good as foil capacitors, which is because the metallized capacitors are prone to capacity loss in long-term working conditions and can lead to capacity reduction after self-healing. Therefore, if the oscillation circuit with high requirements on capacity stability is used, foil capacitors should be better.


2. Poor resistance to large current, which is due to the fact that the metallized film layer is much thinner than the foil, and the weak capacity to carry large current. In order to change the shortcoming of metallized film capacitors, there have been improved products of high-current metal film capacitors in the manufacturing process. Because the resistance of metal film capacitors is better, and in the solderability and self-recovery properties are also satisfactory, which greatly saves the size space.

More Capacitor For You To Choose

图片26

Certifications

图片40

Packing

图片20

Packaging Details: Exporting Standard Packing for CBB60, when quantity is more than
                                2000pcs,one piece capacitor one color box, 100pcs pack in big brown
                                carton. When quantity less than 2000pcs, 100pcs pack in big brown carton
                                without color box, can offer bulk packing,Individual box packing,then use
                                pallet. TBA by clients.
           Port:            NingBo/ShangHai port
   Delivery Time:     A week after get the deposit


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Mobile/Wechat: 0086 15858612112
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E-mail:sale@jydrq.cn

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