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PCB Component

PCB Component

PCB Component

PCB Component

What is PCB component?

PCB Component is a basic unit that has its independent circuit function and constitutes a circuit. It is a general term for capacitors, resistors, transistors, and other electronic devices. It is a component of electronic components and small machines and instruments; commonly used electronic components include resistors, capacitors, potentiometers, switches, etc.; any electronic circuit in life is composed of components.


PCB Component includes: resistors, capacitors, inductors, potentiometers, electron tubes, radiators, electromechanical components, connectors, semiconductor discrete devices, electro-acoustic devices, laser devices, electronic display devices, optoelectronic devices, sensors, power supplies, switches, micro specials Motors, electronic transformers, relays, printed circuit boards, integrated circuits, various circuits, piezoelectrics, crystals, quartz, ceramic magnetic materials, substrate substrates for printed circuits, special materials for electronic functional processes, electronic adhesive (band) products, Electronic chemical materials and parts, etc.

In terms of quality, PCB Component has the European Union's CE certification, the United States' UL certification, German VDE and TUV and China's CQC certification and other domestic and foreign certifications to ensure the qualification of components.

PCB Component

PCB Component

What are the common PCB Component?

Active components (active components) include: chip (IC), memory chip (memory), discrete components;

Passive components include: capacitors, resistors, relays, oscillators, sensors, rectifier bridges, optocouplers, connectors, chips, fuses, inductors, switches, diodes, transistors, etc.;

Chip: The English abbreviation is IC, also known as integrated circuit. It is a device with a certain function formed by integrating transistors, resistors, capacitors and other components on a silicon substrate using a special process.

Capacitor: It is a component composed of two metal films close together and separated by insulating materials. The characteristic of the capacitor is mainly to block the direct current and pass the alternating current. Generally, it is indicated by "C" plus a number in the circuit (for example, C21 represents the capacitor numbered 21).

Resistors: The main functions of resistors in the circuit are: shunting, current limiting, voltage division, biasing, etc., generally represented by "R" plus a number in the circuit (for example, R2 represents the resistor numbered 2).

Inductor: It is an energy storage element that can convert electrical energy into magnetic field energy and store energy in the magnetic field. It often works with capacitors to form LC filters, LC oscillators, etc. The commonly used symbol L indicates that its basic unit is Henry (H), and millihenry (mH) is commonly used as the unit.

Relay: A relay is an electrical control device. In fact, it is an "automatic switch" that uses a small current to control the operation of a large current. The circuit plays the role of automatic adjustment, safety protection, and conversion circuit;

Oscillator: An electronic component used to generate repetitive electronic signals (usually sine waves or square waves). It is an energy conversion device-an electronic circuit or device that can convert direct current into an alternating current signal with a certain frequency. The circuit formed by it is called an oscillating circuit;

Sensor: It is a detection device; it can transform the measured information into electrical signals or other required forms of information output to meet the requirements of information transmission, processing, storage, display, recording and control. According to its basic perception function, it is usually divided into ten categories: heat sensitive components, photosensitive components, gas sensitive components, force sensitive components, magnetic sensitive components, humidity sensitive components, acoustic components, radiation sensitive components, color sensitive components, and taste sensitive components. .

Rectifier bridge: the rectifier tube is enclosed in a shell, and the rectification work is completed through the unidirectional conduction principle of the diode, and the alternating current is converted into direct current;

Optocoupler: Use light as a medium to transmit electrical signals. It has a good isolation effect on input and output electrical signals, and is widely used in digital circuits.

Connector: generally refers to electrical connectors. A device that connects two active devices, a device that transmits current or signals. Such as a common socket;

Wafer: mainly composed of arsenic (AS), aluminum (AL), gallium (Ga), indium (IN), phosphorus (P), nitrogen (N), and strontium (Sr). It is the light-emitting component of LED, LED The most core part;

Inductor: It is a component that can convert electrical energy into magnetic energy and store it. Obstruct current changes. The principle is similar to a transformer;

Diode: It has unidirectional conductivity and is mainly used in rectifier circuits, detection circuits, voltage stabilizing circuits, etc., and has a wide range of applications;

Triode: Also called transistor, it has three pins, so it is usually called triode. It has a current amplification function and has a wide range of uses, such as switch control, signal amplification, etc.;

PCB Component

PCB Component

PCB Component can be divided into active components and passive components. Active components refer to components that can stimulate and amplify electrical signals, oscillate, control current or energy distribution and other active functions and even perform data operations and processing when energy is supplied. What are the active components? Mainly include various types of transistors, integrated circuits (ie IC), image tubes, displays, etc. Passive components are relative to active components. It responds passively to electrical signals and cannot respond to electrical signals such as excitation, amplification, and oscillation. Such electronic components commonly include resistors, capacitors, and inductors.


PCB Component can also be divided into active components and passive components. To put it simply, an active component refers to the need for a power supply to supply energy to achieve its specific function, and there is a power supply inside. Electron tubes, transistors, and integrated circuits are all active components. Passive components can realize their own functions without external power supply. For example, resistors, capacitors, inductors, etc., they do not need any energy supply themselves, as long as there is a signal through the circuit to complete their own functions.


Active components, as a classification of electronic component, can also be subdivided into discrete components and integrated circuits, which are relatively speaking. Discrete components refer to single independent electronic components such as resistors, capacitors, and inductors. They have a single function and exist in the smallest unit. An integrated circuit connects discrete components and wiring together to form a combined electronic component with more complex functions. It is also an electronic component with circuit functions and requires a more sophisticated soldering process.


Passive components in PCB Component can be subdivided into circuit components and connection components. To cite a few examples, resistors, capacitors, inductors, transformers, relays, switches, etc. belong to circuit components, and connectors, sockets, connecting cables, and printed circuit boards belong to connection components. It can be seen that circuit component is connected in series by connecting components to form a complete circuit structure.