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Understand the letter codes of common circuit board components in a penny second
PCB factory editor: It is one of the most common basic components on circuit boards. At the same time, the letter code and number of each component will be strictly marked on the silk road layer, so it is particularly important to quickly identify the letter code of the component. Today I will summarize the letter codes of common circuit board components.
Circuit board component letter code
The letters of various common components on the circuit board are: resistor R, capacitor C, diode/light emitting diode D, VD, triode/thyristor V, VT, touch switch S, buzzer B, BZ, chip IC, N, relay J, transformer B, T, varistor RT, fuse F, optocoupler N, connector J, motor D, antenna T.
1. Resistance-R
The full name is Resistor, and the resistance value is generally related to temperature, material, length, and cross-sectional area. According to Ohm's law, R=U/I, and the basic unit of resistance is ohm, which is represented by the Greek letter "Ω".
2. Capacitance-C
Capacitance, also known as "capacitance", refers to the amount of charge storage at a given potential difference, denoted as C, and the international unit is farad (F). Generally speaking, electric charges move under force in an electric field. When there is a medium between conductors, the movement of electric charges is hindered and the electric charges accumulate on the conductors, resulting in accumulation and storage of electric charges. The amount of stored electric charges is called capacitance.
3. Diode-D
Diode, among electronic components, is a device with two electrodes that only allows current to flow in a single direction. Many uses are for its rectification function. The current directionality of most diodes is usually called the "rectification" function. The most common function of a diode is to only allow current to pass in a single direction (called forward bias) and block in the reverse direction (called reverse bias).
These are the letter codes of our commonly used circuit board components. If you see these letter symbols on the circuit board, be sure to distinguish them clearly.
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