I. High-voltage ceramic capacitors
High-voltage ceramic chip capacitor is a capacitor with ceramic material as dielectric. One of the main characteristics of high voltage ceramic chip capacitor is its high withstand voltage. High-voltage ceramic chip capacitor is a circular plate capacitor with ceramic material as dielectric. In the "ceramic chip" capacitor, the voltage below DC50v is generally called low voltage, DC 100V~500V is medium-high voltage, DC 1000v~6000v is high voltage, safety Y capacitor is also high voltage, and DC6000v is extra high voltage.
2KV and 3KV voltages are common. Often used in high-pressure situations.
The capacitor function of high-voltage ceramic chip has the characteristics of DC resistance and high voltage resistance, and is suitable for high-voltage bypass and coupling circuits. The low-loss high-voltage wafer has low dielectric loss and is especially suitable for TV receivers and scanning circuits.
2. What are the specifications of ceramic capacitors?
Ceramic chip capacitor is a capacitor ceramic with high dielectric constant, such as barium titanate-titanium oxide, which is extruded into a round tube, disk or wafer as the medium. Metal film was plated on the surface of ceramics, and silver was plated on ceramics by sintering infiltration as electrode.
Ceramic chip capacitors (ceramic dielectric capacitors) have three main functions:
1. The capacity loss has high stability to temperature and frequency; 2. The special series structure is suitable for long-term working reliability under high voltage; 3. The current climbing rate is high, which is suitable for the non-inductive structure of large current loop. Usually used in high stability oscillation circuits, as loops, bypass capacitors and pad capacitors, to eliminate high frequency interference.
Ceramic capacitors are not suitable for pulse circuits because they are easily broken down by pulse voltage.
Ceramics can be divided into first-class porcelain, second-class porcelain and third-class porcelain. Class I porcelain, NP0, has good temperature characteristics, frequency characteristics and voltage characteristics. Because of the low dielectric constant, the capacity is not large. Class II porcelain, followed by X7R, has better temperature-voltage characteristics; Third-grade porcelain has a high dielectric constant, so it can have a large capacity, but its temperature-voltage characteristics are not very good.
Ceramic chip capacitors are usually small in size. In addition, another important feature is emphasized: porcelain capacitors are often in short circuit state after breakdown. This is its weakness. ) After the failure of thin-film capacitors, the porcelain of chip capacitor specification II is generally in an open circuit state, also known as high dielectric constant type. It is a capacitor with high dielectric constant, which is suitable for bypass, coupling or circuits with low requirements on loss and capacitance stability. This ceramic medium is characterized by the nonlinear change of capacitance in the temperature range. Its characteristics meet the following standards:
Usage: 1). Bypass and coupling; 2) For the stability of Q value and capacity, a general stepping circuit is needed.
Third, the identification method of capacitance
One of the labels of capacitor withstand voltage is a combination of a number and a letter. Numbers represent the power exponent of 10, and letters represent numerical values in V (Volts).
The letter A B C D E F G H J K Z
Compressive value1.01.251.62.02.53.15.05.06.38.09.0.
1J stands for 6.3* 10=63V 2G stands for 4.0* 100=400V 3A stands for1.0 *1000 =1000v.
Because the capacitance is greater than the resistance,
So direct nominalization is generally used. If it is 10n, it is 10nF, and 100p is 100pF. If it's 4n7, it's 4.7nF, the direct marking method of nonstandard units: represented by 1 ~ 4 digits, that is, exponential marking. The unit of capacity is pF, such as monolithic and some ceramic capacitors, which are generally exponential. 47 1 stands for 47× 10 1 PF = 470 PF. Ceramic capacitors also have direct identification capacity in pF.
Tantalum capacitors, generally directly identify the value, commonly used unit is f (the digital identification code of capacitors is supplemented by pongo users, thank you! ) color code marking method: along the lead direction of the capacitor, different numbers are represented by different colors. The first and second rings represent capacitance, and the third color represents the number of zeros (in pF) after significant digits. Color meaning: black =0, brown = 1, red =2, orange =3, yellow =4, green =5 and blue =6.
Identification of capacitor: look at the nominal value above, generally indicating the capacity and positive and negative poles. For example, on a tantalum capacitor, one end with a white wire is a positive electrode, and the other end is like an electrolytic capacitor.
Just use the length of the needle to distinguish the positive and negative poles. Long legs are positive and short legs are negative. Resistance-capacitance sequence value capacitance value sequence. Ceramic chip capacitors are ceramic chip capacitors, also known as disk ceramic dielectric capacitors, which can be divided into high-voltage ceramic chip capacitors and low-voltage ceramic chip capacitors. What are the characteristics of high-voltage ceramic chip capacitors? What are the specifications of ceramic capacitors? Let me introduce them to you! I. High-voltage ceramic capacitors
High-voltage ceramic chip capacitor is a capacitor with ceramic material as dielectric. One of the main characteristics of high voltage ceramic chip capacitor is its high withstand voltage. High-voltage ceramic chip capacitor is a circular plate capacitor with ceramic material as dielectric. In the "ceramic chip" capacitor, the voltage below DC50v is generally called low voltage, DC 100V~500V is medium-high voltage, DC 1000v~6000v is high voltage, safety Y capacitor is also high voltage, and DC6000v is extra high voltage.
2KV and 3KV voltages are common. Often used in high-pressure situations.
The capacitor function of high-voltage ceramic chip has the characteristics of wear-resistant DC high voltage, which is suitable for high-voltage bypass and coupling circuits. The low-loss high-voltage chip has lower dielectric loss.
It is especially suitable for TV receivers and scanning circuits. 2. What are the specifications of ceramic capacitors?
Ceramic chip capacitor is a capacitor ceramic with high dielectric constant, such as barium titanate-titanium oxide, which is extruded into a round tube, disk or wafer as the medium. Metal film was plated on the surface of ceramics, and silver was plated on ceramics by sintering infiltration as electrode.
Ceramic chip capacitors (ceramic dielectric capacitors) have three main functions:
1. The capacity loss has high stability to temperature and frequency; 2. The special series structure is suitable for long-term working reliability under high voltage; 3. The current climbing rate is high, which is suitable for the non-inductive structure of large current loop. Usually used in high stability oscillation circuits, as loops, bypass capacitors and pad capacitors, to eliminate high frequency interference.
Ceramic capacitors are not suitable for pulse circuits because they are easily broken down by pulse voltage.
Ceramics can be divided into first-class porcelain, second-class porcelain and third-class porcelain. Class I porcelain, NP0, has good temperature characteristics, frequency characteristics and voltage characteristics. Because of the low dielectric constant, the capacity is not large. Class II porcelain, followed by X7R, has better temperature-voltage characteristics; Third-grade porcelain has a high dielectric constant, so it can have a large capacity, but its temperature-voltage characteristics are not very good. Ceramic chip capacitors are usually small in size. In addition, another important feature is emphasized: porcelain capacitors are often in short circuit state after breakdown. (This is its weakness) and the thin film capacitor is generally open after failure.
Porcelain capacitor specifications Class II porcelain, also called high dielectric constant type, is a kind of high dielectric constant capacitor suitable for bypass, coupling or circuits with low requirements on loss and capacitance stability. This ceramic medium is characterized by the nonlinear change of capacitance in the temperature range. Its characteristics meet the following standards:
Usage: 1). Bypass and coupling; 2) For the stability of Q value and capacity, a general stepping circuit is needed.
Third, the identification method of capacitance
One of the labels of capacitor withstand voltage is a combination of a number and a letter. Numbers represent the power exponent of 10, and letters represent numerical values in V (Volts).
The letter A B C D E F G H J K Z
Compressive value1.01.251.62.02.53.15.05.06.38.09.0.
1J stands for 6.3* 10=63V 2G stands for 4.0* 100=400V 3A stands for1.0 *1000 =1000v.
Because the volume of the capacitor is larger than that of the resistor, the direct nominal method is generally adopted. If it is 10n, it is 10nF, and 100p is 100pF. If it's 4n7, it's 4.7nF,
Direct marking method of nonstandard units: represented by 1 ~ 4 digits, that is, exponential marking. The unit of capacity is pF, such as monolithic and some ceramic capacitors, which are generally exponential. 47 1 stands for 47× 10 1 PF = 470 PF. Ceramic capacitors also have direct identification capacity in pF.
Tantalum capacitors, generally directly identify the value, commonly used unit is f (the digital identification code of capacitors is supplemented by pongo users, thank you! ) color code marking method: along the lead direction of the capacitor, different numbers are represented by different colors. The first and second rings represent capacitance, and the third color represents the number of zeros (in pF) after significant digits. Color meaning: black =0, brown = 1, red =2, orange =3, yellow =4, green =5 and blue =6.
Identification of capacitor: Look at the nominal value above. Generally, the capacity and positive and negative poles are indicated. For example, on a tantalum capacitor, one end with a white line is the positive electrode. In addition, like electrolytic capacitors, the length of the pin is used to distinguish the positive and negative electrodes. Resistance-capacitance sequence value capacitance value sequence.
Ceramics can be divided into first-class porcelain, second-class porcelain and third-class porcelain. Class I porcelain, NP0, has good temperature characteristics, frequency characteristics and voltage characteristics. Because of the low dielectric constant, the capacity is not large. Class II porcelain, followed by X7R, has better temperature-voltage characteristics; Third-grade porcelain has a high dielectric constant, so it can have a large capacity, but its temperature-voltage characteristics are not very good. Ceramic chip capacitors are usually small in size. In addition, another important feature is emphasized: porcelain capacitors are often in short circuit state after breakdown. (This is its weakness) and the thin film capacitor is generally open after failure.
Porcelain capacitor specifications Class II porcelain, also called high dielectric constant type, is a kind of high dielectric constant capacitor suitable for bypass, coupling or circuits with low requirements on loss and capacitance stability. This ceramic medium is characterized by the nonlinear change of capacitance in the temperature range. Its characteristics meet the following standards:
Usage: 1). Bypass and coupling; 2) For the stability of Q value and capacity, a general stepping circuit is needed.
Third, the identification method of capacitance
One of the labels of capacitor withstand voltage is a combination of a number and a letter. Numbers represent the power exponent of 10, and letters represent numerical values in V (Volts).
The letter A B C D E F G H J K Z
Compressive value1.01.251.62.02.53.15.05.06.38.09.0.
1J stands for 6.3* 10=63V 2G stands for 4.0* 100=400V 3A stands for1.0 *1000 =1000v.
Because the volume of the capacitor is larger than that of the resistor, the direct nominal method is generally adopted. If it is 10n, it is 10nF, and 100p is 100pF. If it's 4n7, it's 4.7nF,
Direct marking method of nonstandard units: represented by 1 ~ 4 digits, that is, exponential marking. The unit of capacity is pF, such as monolithic and some ceramic capacitors, which are generally exponential. 47 1 stands for 47× 10 1 PF = 470 PF. Ceramic capacitors also have direct identification capacity in pF.
Tantalum capacitors, generally directly identify the value, commonly used unit is f (the digital identification code of capacitors is supplemented by pongo users, thank you! ) color code marking method: along the lead direction of the capacitor, different numbers are represented by different colors. The first and second rings represent capacitance, and the third color represents the number of zeros (in pF) after significant digits. Color meaning: black =0, brown = 1, red =2, orange =3, yellow =4, green =5 and blue =6.
Identification of capacitor: Look at the nominal value above. Generally, the capacity and positive and negative poles are indicated. For example, on a tantalum capacitor, one end with a white line is the positive electrode. In addition, like electrolytic capacitors, the length of the pin is used to distinguish the positive and negative electrodes. Resistance-capacitance sequence value capacitance value sequence.