What do markings on capacitors mean?
Many capacitor manufacturers use a shorthand notation to indicate capacitance on small caps.\nIf you have a capacitor that has nothing other than a three-digit number printed on it, the third digit represents the number of zeros to add to the end of the first two digits. The resulting number is the capacitance in pF.
What is written on capacitor?
The base unit of capacitance is the farad (F). This value is much too large for ordinary circuits, so household capacitors are labeled with one of the following units: 1 µF, uF, or mF = 1 microfarad = 10-6 farads. (Careful — in other contexts, mF is the official abbreviation for millifarads, or 10-3 farads.)
How do you read a capacitor label?
Read codes that contain letters instead.
- If the letter is an R, replace it with a decimal point to get the capacitance in pF. For example, 4R1 means a capacitance of 4.1pF.
- If the letter is p, n, or u, this tells you the units (pico-, nano-, or microfarad).
- A code like “1A253” is actually two codes.
What does the 5 dot color code on a capacitor mean?
The color of the fifth dot (E) indicated the percent tolerance on the accuracy of the capacity rating. No color in this position indicates a tolerance of +/- 20% in the capacity value. A capacitor with the 5-dot color code in shown in illustration No.4 above. Six Dot Color Code
Is it easy to understand the marking on capacitors?
For electrolytic capacitors the marking are easy to understand and many technician have no problem here. The challenge is with non-polar capacitor, let have a look at some of the marking on non-polar capacitors.
What is the symbol for a capacitor?
(i) Capacitor Symbol: Its symbol consists of two parallel lines separated from each other i.e. Flat, curved or an arrow passes through it. The flat line indicates that the capacitor is non-polarized, the curved line indicates that the capacitor is polarized and arrow type indicates that it is of a variable type.
What is a 3-dot capacitor?
On some makes of capacitors, the dots are shaped so they are slightly ‘pointed’ in the direction in which they are to be read, others have an adjacent direction-arrow molded alongside each dot as shown in illustration No. 3. 3-Dot Example: Red(A) Green(B) Black(C) = 25 mmfd. = .000025 mfd