Key Points for Selecting Ceramic Chip Capacitors (MLCC) 2

(NPO) material has the best temperature and frequency stability, followed by X7R, and Y5V (Z5U) is the worst

Surface mount capacitors currently use different material specifications such as NPO, X7R, Z5U, Y5V, etc. Different specifications have different uses Below, we will only introduce the performance and applications of commonly used NPO, X7R, Z5U, and Y5V, as well as the ordering items that should be noted in procurement to attract everyone's attention Different companies may have different naming methods for capacitors with different performance mentioned above. Here, we refer to the naming method of our company, Sanju Electronics. For products from other companies, please refer to their product manuals  diode

The main difference between NPO, X7R, Z5U, and Y5V is their different filling media Under the same volume, capacitors composed of different filling media have different capacities, resulting in different dielectric losses and capacity stability of the capacitors So when using capacitors, different capacitors should be selected according to their different functions in the circuit

An NPO capacitor   diode

NPO is a commonly used single-chip ceramic capacitor with temperature compensation characteristics Its filling medium is composed of rubidium, samarium, and some other rare oxides

NPO capacitors are one of the most stable capacitors in terms of capacitance and dielectric loss When the temperature ranges from -55 ℃ to+125 ℃, the capacitance change is 0 ± 30ppm/℃, and the variation of capacitance with frequency is less than ± 0.3 Δ C. The drift or hysteresis of NPO capacitance is less than ± 0.05%, which can be ignored compared to thin film capacitors larger than ± 2% The typical change in capacity relative to service life is less than ± 0.1% The capacitance and dielectric loss of NPO capacitors vary with frequency depending on the packaging form, and larger packaging sizes have better frequency characteristics than smaller packaging sizes NPO capacitors are suitable for slot capacitors in oscillators and resonators, as well as coupling capacitors in high-frequency circuits   diode