PCB News - How much can you recognize the component symbols on the pcb board?

How much can you recognize the component symbols on the PCB board?

PCB factory: The current electronic components are developing towards microminiaturization, low power consumption, intelligence and high reliability. It can be said that good achievements have been made in this regard. A circuit board will be composed of a variety of different electronic components to form a whole, which becomes a structure with circuit functions required by people. Each component has its own identification symbol. We can identify the type and function of the component by identifying these symbols. How much do you recognize the component symbols on the PCB board?

The packaging types of electronic components on integrated circuit boards are different. Even if different types of electronic components look the same in appearance, their internal structures and functions are different. Take the TO220 packaged component, it may be a triode, thyristor, field effect tube, or dual diode. This is the TO-3 packaged component, which may be a triode, an integrated circuit, etc. Even the diode is more than one kind of package, such as the glass package, plastic package and bolt package of the diode. Some diodes use one or more packages, such as Zener diodes, rectifier diodes, tunnel diodes, fast recovery diodes, microwave diodes, Schottky diodes, etc.

SMD diodes and polarized SMD capacitors are easy to distinguish from other SMD components. Polar SMD components have a common feature, which is the polarity mark.
The definition of some symbols on the PCB board of the electronic components on the PCB board is explained:

R is resistance;
L is the inductance coil (usually the coil is wound on the iron core ring, and some have a closed shell); C is the capacitor (the tall, upright cylindrical shape, covered with plastic skin, and the cross indentation on it is an electrolytic capacitor, and the flat one is pasted. Chip capacitor);
The two legs are diodes;
The three-legged one is a triode;
Many legs are integrated circuits;
UR is a silicon controlled rectifier;
VC is a rectifier with power supply for the control circuit;
UF is the frequency converter;
UC is a converter;
UI is inverter;
M is the electric motor;
MA is an asynchronous motor;
MS is a synchronous motor;
MD is a DC motor;
MW is a wound rotor induction motor;
MC is a squirrel cage motor;
YM is an electric valve;
YV is a solenoid valve and so on.

Through the above introduction, I believe you have a new understanding of the identification of component symbols on the PCB board, and I hope this article can help you!

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