Ceramic capacitor identification method: the identification method of the capacitor and the resistance of the identification method is basically the same, divided straight standard method, color standard method and number of standard method 3 kinds. The basic unit of capacitance is F (F), and other units are: milliF (mF), microF (μF)/mju:/, nF, and pF. Where: 1 Farad = 1000 millifarads (mF), 1 millifarad = 1000 microfarads (μF), 1 microfarad = 1000 nanofarads (nF), 1 nanofarad = 1000 picofarads (pF)
The capacity of a large capacity capacitor is directly marked on the capacitor, such as 10 μF/16V.
The capacity of a small-capacity capacitor is represented by a letter or a numeral on the capacitor.
Letter notation: 1m=1000 μF 1P2=1.2PF 1n=1000PF
Digital representation: The three-digit representation is also called digital representation of capacitance. The first two digits of the three digits are the valid figures of the nominal capacity, and the third digits represent the number of zeros following the valid digits. Their units are pF.
For example, 102 indicates a nominal capacity of 1000 pF.
221 indicates a nominal capacity of 220 pF.
224 indicates a nominal capacity of 22x10 (4) pF.
In this notation, there is a special case where when the third digit is represented by "9", the effective number is multiplied by the power of -1 to represent the capacity.
For example, 229 means that the nominal capacity is 22x(10-1)pF=2.2pF.
Allowable error ±1% ±2% ±5% ±10% ±15% ±20%
For example, a ceramic capacitor with capacitance of 104 J means that the capacity is 0.1 μF and the error is ±5%.
104 is to add 4 zeros after 10, that is 100000. The unit is the pico method, which is 100000pF = 0.1μF
103 is to add 3 zeros after 10, which is 10000. The unit is the pico method, which is 10000pF = 0.01μF
Chip resistance is also labeled as 104 is 100000Ω = 100K, 103 = 10000Ω = 10K