Ceramic capacitors are classified into three classes based on their quality and function. Class three is best for power supplies, class two for bypass circuits, and class one for sensitive circuits. Capacitance value and shape should also be considered when choosing the correct component.
Correct choice of capacitor depends on the intended use of the component, such as whether it is installed within a device’s power supply or part of a bypass circuit. Ceramic capacitors are classified into three classes; these classes vary in the quality and function of the components. Class three is best for power supplies, class two for bypass circuits, and class one for sensitive circuits. Additionally, a ceramic capacitor can vary in shape, from a small surface-mounted component to a large soldered part.
You can choose a ceramic capacitor in the class three category for power applications. Class three components are not intended for high precision applications; these capacitors can change their capacitance value over time, which alters the amount of electricity flowing through a circuit. These components work well in power supplies since they are lower in cost; power supplies require many capacitors for proper circuit operation.
A class two ceramic capacitor offers greater electrical efficiency across the many layers of the component. These types of capacitors work well in bypass circuits; however, they still suffer from poor accuracy. Similar to the class three category, the capacitance varies greatly as the component heats up. Keep in mind that these components are not meant for sensitive electrical circuits.
Class one capacitors offer the best accuracy of all categories. The component can withstand temperature changes without affecting the electrical flow through the circuit. You can choose this ceramic capacitor for sensitive circuits, such as a computer motherboard. High quality condenser design will cost more than the other two categories; you should consider this factor when choosing the correct component.
Each of the capacitor classes offers two functional forms, surface mounted or plug soldered. Surface mounted capacitors are typically very small; these components may require special tools for installation and removal. Many times, these capacitors are fitted by computers and automated machines as they can be extremely small.
Hole soldered capacitors are the most common components. These capacitors have wire legs that are installed inside the holes in the circuit board and soldered for a proper connection. Hobbyists may use this type of capacitor design as it is easier to handle during installation and removal; soldering tools are less expensive and readily available at local electronics stores.
Before choosing a ceramic capacitor, it is necessary to check the specific capacitance value needed for the particular circuit. Each capacitor has a value printed on its outer shell; most circuits have schematics that provide the needed value. You can match the value on the schematic with the number printed on the capacitor to ensure correct component selection.
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