Difference between MKP capacitors and CBB capacitors

Capacitors are an important part of many circuits and power equipment. Different requirements in the circuit and different capacitors are used, so capacitors can be divided into many different types. Can be divided according to material, structure, function, etc., and novices often mistake CBB and MKP capacitors.

MKP is a metallized polypropylene film capacitor, which is characterized by small loss, non-inductive structure, and self-healing by breakdown. Suitable for high voltage, high current and high pulse strength circuits. CBB capacitor is also called polypropylene capacitor. The electric capacity is 10p--10μ, and the rated voltage is 63-2000V. Non-polar, high insulation resistance, excellent frequency characteristics, and low dielectric loss.

Differences in use: MKP capacitors are mainly used for EMI line filtering, CBB capacitors are mainly used for circuits such as oscillation, coupling, resistance-capacitance and step-down; CBB22 has lower cost than MKP, and its electrical performance meets the actual DC voltage withstand Can replace MKP.

The nominal rated voltage of MKP capacitors is 250 / 275VAC (x2), but its DC withstand voltage must reach 2000V, while the standard withstand voltage of CBB capacitors is only 1.6 times the rated voltage.

Adiabatic performance of capacitors: Both MKP and CBB capacitors use polypropylene film dielectric, so the losses are small and the heat generation is small. In actual use, the temperature rise should not be higher than the ambient temperature by 6 ° C. In actual tests, the temperature rise of many circuit boards is within 4 ° C. If the temperature rises above this condition, it proves that the capacitor has a large working power, and both types of capacitors are more likely to fail.

Application methods and uses: CBB22 is lower than MKP in operating cost, and can replace MKP in terms of electrical performance and meet the actual DC withstand voltage conditions. MKP capacitors are mainly used for EMI line filtering, and CBB capacitors are mainly used in circuits such as oscillation, coupling, and resistance-capacitance buck. The cost of CBB is lower than that of MKP, and it can replace MKP in electrical performance under the condition of meeting the actual DC withstand voltage.