In this type of coding, the first two digits are significant digits and the third digit is a multiplier and alphabet represents the tolerance value as given in the table. The most popular method is three digit number along with special number and these alphabets can refer tolerance, voltage rating, temperature coefficient, dielectric material, etc. There are different methods to identify the capacitor and to calculate its value. The digit value is numbered in Pico Farads. Some of the capacitors have only two digit number and most of them have three digit number. Number Coding of CapacitorĬeramic type of capacitors is coded in its body, but these is a little bit confusing as compared to color coding. These methods include value or number printed on the body of the capacitor or color coding of the capacitor. The value of capacitors can be determined by several ways depending up on the type of capacitor like electrolytic, disc, film capacitors, etc. These major features of polyester capacitor make it as widely used, cheapest and most popular type of capacitor. As the polyester capacitor has high capacitance per unit volume, it comes in smaller size for high capacitance values compared with the other types of capacitors. These capacitors have high temperature coefficient values and isolation resistances. These capacitors are available in the range of 1nF to 15uF rated at voltages from 50V – 1500V. It ensures opposition to the sudden changes in voltage if the applied input voltage to the capacitor is suddenly changed, then capacitor won’t react quickly, but gradually reacts so that the voltage across the capacitor is changed very slowly as compared to the input voltage. Introduction to Capacitors and Polyester CapacitorĪ capacitor is a two- terminal linear passive component capable of storing an electrical charge in the form of an electric field.
Therefore, this article gives a brief information on finding polyester capacitor value by capacitor color code and number code methods. Finding its value is the main task while building the circuits is practical. The Capacitor consists of two electrode plates which are separated by an insulating or dielectric material such as mica, paper, mica etc.
It is an important and useful component because it has features like energy storing capability, minimizing sudden voltage changes, selectivity of frequencies, bypassing of frequencies, phase shifting, etc. As a widely used electrical component capacitor plays an active role in the functioning of any circuit and without it the circuit design will not be completed.
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