PCB News - PCBA patch processing of these 15 electrical components

PCBA patch processing of these 15 electrical components

PCBA patch processing mainly includes two major processes: PCB circuit board production and SMT patch processing. Electronic components are inevitably used in the middle. Electronic components are the basic part of PCBA patch processing and also affect the performance and quality of PCBA finished products. Key factor. So what are the commonly used electronic components in PCBA patch processing? The following is an introduction for everyone.

1. Resistance

Resistors are electronic components with resistance characteristics and are one of the most widely used components in PCBA processing. Resistors are divided into fixed resistors and variable resistors (potentiometers), which play the role of voltage division, current shunting and current limiting in the circuit.

2. Capacitance

Capacitor is also one of the basic components in PCBA processing. It is a component that stores electrical energy and plays the role of coupling, filtering, DC blocking and tuning in electronic circuits.

3. Inductance coil

Inductance coil is abbreviated as inductance, which has the function of storing magnetic energy. Inductance coils are usually composed of bobbin, winding, shield, magnetic core and so on.

4. Potentiometer

A resistor whose resistance value can be changed, that is, a resistor that can be continuously adjusted within a specified range, is called a potentiometer. The potentiometer is composed of a shell, a sliding end, a rotating shaft, a ring resistance body and 3 lead-out ends.

5. Transformer

The transformer is composed of an iron core (or magnetic core) and a coil. The coil has two or more windings. The winding connected to the power supply is called the primary winding, and the remaining windings are called the secondary winding.
A transformer is a device that transforms voltage, current, and impedance. When an alternating current is passed through the primary coil, an alternating current magnetic flux is generated in the iron core (or magnetic core), causing a voltage (or current) to be induced in the secondary coil. Transformers are mainly used for AC voltage conversion, current conversion, power transfer, impedance conversion and buffer isolation, etc., and are one of the indispensable important components in the PCBA machine.

6. Crystal diode

Crystal diodes (ie semiconductor diodes, hereinafter referred to as diodes) are made of a PN junction, electrode leads, and an externally sealed tube case. It has unidirectional conductivity.

7. Transistor

Transistor (hereinafter referred to as triode) is the core device for signal amplification and processing, and is widely used in PCBA complete machines.

8. Field Effect Tube

The field effect transistor (referred to as the field effect tube) is also a kind of semiconductor device with a PN junction. Unlike the triode, it does not use the conductivity characteristics of the PN junction, but uses its insulation characteristics.

9. Electroacoustic Devices

The devices used in the circuit to complete the conversion between electrical signals and sound signals are called electro-acoustic devices. It has a wide range of types, including speakers, microphones, earphones (or earplugs), microphones, receivers, and so on.

10. Optoelectronics

Photoconductive devices that use semiconductor photosensitivity, photovoltaic cells and semiconductor light-emitting devices that use semiconductor photovoltaic effects are collectively referred to as optoelectronic devices.
11. Display device

Electronic display devices refer to photoelectric conversion devices that convert electrical signals into optical signals, that is, devices used to display numbers, symbols, text or images. It is a key component of an electronic display device and has a great impact on the performance of the display device.

12. Sensor

A sensor can sense a device or device that is measured and converted into a usable signal according to a certain rule. It is usually composed of sensitive components and conversion components.

13. Surface mount components

Surface mount components (SMC and SMD) are also called chip components or chip components, which include resistors, capacitors, inductors and semiconductor devices, etc., have small size, light weight, no leads or very short leads, High installation density, high reliability, good anti-vibration performance, easy to realize automation and so on.
14. Thyristor

SCR is the abbreviation of SCR rectifier element. It is a high-power semiconductor device with a four-layer structure with three PN junctions, also known as a thyristor. It has the characteristics of small size, relatively simple structure, and strong functions. It is one of the more commonly used semiconductor devices.

15. Switches, relays, various connectors

Switches are used in electronic equipment to cut off, connect, or switch circuits. A relay is an automatic control device whose output will change leaps and bounds when the input (electricity, magnetism, sound, light, and heat) reaches a certain value.

These electronic components are inseparable from PCBA patch processing, and the performance and quality of electronic components also affect the quality of PCBA finished products. Therefore, it is necessary to understand the function of each component in detail and choose carefully.