Regarding the SMD high voltage capacitors, he actually has another name, called ceramic multilayer chip capacitors, which can be regarded as a production process using ceramic powder. Its interior is constructed of precious metal palladium. It is sintered at a high temperature. It is made by plating silver on ceramics as electrodes. Products are divided into high-frequency porcelain NP0 (COG) and low-frequency porcelain X7R two materials. NP0 is known for its small size. It has only a small package size. It is a capacitor with high temperature coefficient resistance and good high-frequency performance. Therefore, NP0 is almost used in high-stability oscillating circuits to serve as circuit filter capacitors. X7R ceramic dielectric capacitors are limited to be used for bypassing or DC blocking in circuits with common operating frequencies, or occasions where stability and loss are not high. Such capacitors are not suitable for use in alternating current (AC) pulse circuits because they are easy to be used in AC pulse circuits. Pulse voltage breakdown, so it is not intended to be used in AC circuits.
classification
Temperature compensation type: NP0 quality NP0, also known as COG, has the most stable electrical performance, basically does not change with temperature, voltage, and time. It is an ultra-stable, low-loss capacitor material type, suitable for high stability and reliability requirements. Frequency, UHF, and VHF circuits.
High-dielectric constant type X7R dielectric: X7R is a ferroelectric, so capacitors with a larger capacity than NPO dielectrics can be manufactured. The performance of this kind of capacitor is relatively stable. With the change of temperature and voltage time, its unique performance changes are not significant. It is a type of stable capacitor material and used in direct isolation, coupling, bypass, filter circuit and high reliability requirements. Frequency circuit.
Semiconductor-type X5R dielectric: X5R has a high dielectric constant, and is often used to produce large-capacity capacitors with larger specific capacitance and higher nominal capacitance. However, its capacity stability is more sensitive than X7R, and its capacity and loss are more sensitive to temperature, voltage and other test conditions. It is mainly used in the oscillation, coupling, filtering and bypass circuits in the electronic complete machine.
Advantages: small package size, stable quality, high insulation performance, high voltage resistance
Disadvantages: small capacity, currently the largest UF, easy to be broken down by pulse voltage.
Performance parameter
Material NP0 (COG).X7R.X5R.Y52.Capacity 0.1PF-PF-1NF-1UF-UF3.Voltage 6.3-1K-2K-5K4.Package—-Application range: Products are widely used in module power supplies and automobiles Electronics, communication power supplies, LED lighting power supplies and other fields have broad application development prospects. Hardware categories are generally more professional in the hard city. Professional problems are solved professionally. This is the fastest and best method. It is better than being blind. Yes, because there are too many electronic models of electronic components, you will get a mistake if you are not careful, so I still find a professional to help you solve it.XUANSN SMD high voltage capacitors worth choosing.
