Capacitor, usually referred to simply as its ability to hold charge, is a capacitor, which is represented by the letter C. Definition 1: A capacitor, as its name implies, is a' charged container' and a device that holds charge. English name: capacitor. Capacitor is one of the electronic components widely used in electronic equipment, which is widely used in blocking DC, coupling, bypass, filtering, tuning circuit, energy conversion, control and so on. Definition 2: capacitor, any two conductors (including wires) that are insulated from each other and closely spaced form a capacitor.
There are four ways to express the capacity of a capacitor:
1. Direct standard method
Directly marked with numbers and unit symbols. For example, 1uF means 1 microfarad, and some capacitors use "r" to represent decimal points, for example, R56 means 0.56 microfarad.
2. Character symbols
Capacity is represented by a regular combination of numbers and text symbols. For example, p 10 means 0. 1pF, 1p0 means 1pF, 6P8 means 6.8pF, and 2u2 means 2.2uF.
3. Color coding method
The main parameters of the capacitor are represented by color rings or color points. The color coding method of capacitors is the same as that of resistors.
Symbols of capacitor deviation:+100%-0-H,+100%-1r, +50%- 10%-T,+30%-1.
4. Mathematical counting method: Mathematical counting method is generally three digits, the first and second digits are significant digits, and the third digit is multiple. The nominal value is 272, and the capacity is 27x 10 2 = 2700 pf. If the scale value is 473, it is 47x 10 3 = 47000 pf (the following 2 and 3 both represent the power of 10). Another example is: 332 = 33x 10 2 = 3300 pf.
The allowable errors corresponding to the capacitance error symbol F G J K L M are1%2% 5%10%15% 20% respectively.
For example, the capacitance of ceramic tile is 104J, which means the capacitance is 0. 1 uF with an error of 5%.