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Types and characteristics of patch capacitors(II)

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X7R capacitor.

X 7 R capacitors are called temperature-stable ceramic capacitors.When the temperature ranges from -55 ℃ to + 125 ℃, the capacity of the capacitor changes to 15. It is important to note that the change of capacitor capacity is nonlinear at this time.

The capacity of X7R capacitor is different under different voltage and frequency, and it also changes with time, about 1% Δ C is changed every 10 years, which shows that the capacity of X7R capacitor changes about 5% in 10 years.

X7R capacitors are mainly used in industrial applications with low requirements. And when the voltage changes its capacity change is acceptable under the conditions.Its main feature is that at the same volume, the capacitance can be done relatively large.The following table shows the range of capacities that can be selected for X 7 R capacitors.

Sealing DC=50V DC=100V.

0805 330pF---0.056 μ F 330pF---0.012 μ F.

1206 1000pF---0.15 μ F 1000pF---0.047 μ F.

1210 1000pF---0.22 μ F 1000pF---0.1 μ F.

2225 μ F-1 μ F 0.01 μ F- 0.56 μ F


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