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How Do PCBA Board Work In Electronics ?

There is no doubt that printed circuit board assembly plays a vital role in the production of electronic devices. The functionality of most devices depends on printed circuit boards. PCBA electronics is a wide field that deals majorly with the assembly of PCBs. Electronic manufacturers mount electronic components on circuit boards.

A PCB features electronic components on the path for the flow of electrical charge. Some contract electronics companies provide PCBA services. PCBA electronics has continued to experience development in recent years. In this article, we will discuss everything you need to know about PCBA electronics.

What is PCBA Electronics?

contract electronics

PCBs have a predefined metallic path to enable the flow of electricity. However, the assembly of printed circuit boards plays a vital role. PCBA electronics deals with how electronic components are mounted on a circuit board. While a PCB can’t function well, PCBA is a functional board. PCB can’t function since it has no electrical components in place. In PCBA contract electronics, all electrical components are already in place.

A PCB is a foundational material for PCBA electronics. When all electrical components are on a PCB, it is PCBA electronics. This electronics features all the electrical components a board needs to function well. Therefore, PCBA electronics is the process of assembling components on a printed circuit board. Some contract electronics provide PCB assembly.

In the electronics world, PCBA electronics is a challenging aspect. Irrespective of the size of the device you are using, you will find a PCBA. Every single electronic component of a PCBA serves its function. Each of these components plays a significant role in the functionality of a device. It is important one knows the difference between PCB and PCBA electronics.

Difference between PCB and PCBA Electronics

One would often find out that these two terminologies can be confusing. PCB differs from PCBA electronics. PCB and PCBA electronics are core aspects of electronic device manufacturing. No electronic device can go through the production process without PCB and PCBA.

PCB is a blank board with no electronic components. When you mount these components on this board, it becomes a PCBA. PCB is the base of PCBA. It serves as the foundational material of PCBA. A PCBA can’t exist without a PCB.

Printed circuit boards are not functional until they have electronic components on them. The end result of a PCB is PCBA. All PCBs will eventually become PCBA. PCBAs are very important in electronics manufacturing. A PCBA will fail to operate if any of its components are detached.

A PCBA features different copper lines and traces. These boards can be very tiny, but they are very effective. Electronics PCBA is an aspect of the electronic processing industry. It involves mounting various electronic parts on a blank circuit board.  PCBA electronics perform several functions and are ideal in most applications.

Applications of PCBA Electronics

A PCBA board is ideal for use in several applications. Most devices come with PCBA. Computers, smartwatches, smart phones, etc. feature PCBA boards. To date, PCBA electronics are commonly used in most industries. As technology keeps advancing, PCBA electronics will continue improving. Electronic PCBA will always be the core of all electronic devices.

Even in today’s world, PCBA electronics play a significant role. A PCBA board will always be useful in several industries. Let’s discuss the applications of PCBA in today’s world.

Consumer electronics

In this field, PCBAs are largely used. Most of our home appliances can’t function without a PCBA board. Consumer electronics are devices we use in our daily lives. Examples include microwaves, televisions, radios, and smartphones. The manufacturing of these appliances requires the use of a PCBA board. The advent of PCBA electronics has enabled the production of small and complex devices.

Record keeping gadgets, computer devices, mobile phones, and entertainment systems all feature PCBAs. Since PCBAs are mechanically and electrically stable they are suitable for these devices.

Automotive industry

PCBA electronics are common within the automotive industry. This circuitry provides a lot of benefits for this industry. The production of vehicles solely depends on PCBA electronics. Some car parts like car headlights feature PCBA boards. It is evident that this circuitry has had a positive impact in the automotive industry.

The regulator systems in vehicles feature PCBAs. Navigation gadgets also feature PCBA. Without doubt, this board has added a lot of benefits to this industry. From improved safety measures to high-performance automobile parts.

Industrial application

The production of both heavy-duty and light-duty machines involves PCBA. In the manufacturing industry, most machines feature PCBA. These machines make use of high-frequency and high-speed PCBs to ensure smooth operation. Since most of these devices are exposed to harsh conditions, they feature high-performance PCBA boards.

These boards can tolerate high mechanical stress and corrosive chemicals. Devices like a thermometer, AC converters, hydraulics, and pressure pumps all feature PCBA boards.


Light emitting diodes have improved due to the advent of PCBA boards. These days, LED producers utilize PCBA electronics to design various lighting systems.  LED PCBs are now available in the market. This lighting system, LED, is known for its functionality and little power consumption.

Medical devices

PCBA boards are suitable for the production of medical devices. There is a great improvement in the medical industry as a result of PCBA electronics. Medical practitioners make use of some machines to diagnose ailments in patients. These machines feature PCBA electronics. Most medical devices can’t exist without PCBAs. Ultrasound machines, CT scanners, and X-ray devices among others feature electronics PCBA.

Steps in PCBA Process


The PCBA process is an important aspect of the PCB industry. This process involves some steps. The manufacturer must carry out these steps carefully.

Prepare the surface of the PCB

This is the first step in PCB assembly. It involves preparing the board surface for the fabrication of the assembling of the electronic components. You have to choose the right board size and get it ready.

Part placement

This step involves placing the components on the board. The pick and place machine is ideal for this purpose. In those days, manufacturers carried out this step manually. They make use of tweezers to place the components on the circuit boards. This method had so many errors because humans are likely to make mistakes.

This led to the invention of the automatic pick and place machine. With this machine, you can be sure of accuracy and precision. The pick and place machine picks the component and places it in the right location. This machine needs to be programmed before you begin with this step. You need to program this machine for you to place the components at their right locations.


Soldering is a step that involves applying solder paste to the circuit board. A solder paste comprises flux and solder. This mixture helps to melt the metal and join it to the surface. This process is technical and as such, will require a solder paste printing machine. Some manufacturers use the reflow soldering technique wave soldering.


After soldering, you will need to clean the unwanted materials on the PCBA. A fiber brush will be of great use for this purpose. This brush will get rid of any unwanted material on the board.


Errors may likely occur during the PCB assembly. This step helps to detect any error during the assembly of the PCB. Errors can result in no connection or misalignment. Therefore, inspection is very important. It helps to prevent unnecessary expenses in the future. Several inspection techniques are employed in this process.

Techniques of PCBA Electronics

PCBA contract electronics manufacturers employ two main techniques for PCB assembly;

Through-hole Technology

This is an assembly process in which holes are drilled into a circuit board. The manufacturer drills holes into the board. Then, these holes create ways to attach electrical components. PCBA manufacturing company employed this technique first.

Through-hole technology provides a stronger bond between the circuit board and the component. This technique enables more reliable assemblies. The first step in this technique is to drill holes. After that, you put the leads in the hole. The manufacturer then applies solder pastes to ensure the components stay firm.

Surface mount technology

This technique has gained popularity in the PCB industry due to its benefits. PCBA manufacturers prefer surface mount technology to through-hole technology. SMT involves using a machine to mount electronic components on a circuit. This technique is highly flexible and enables greater connection densities.

For this technique, the manufacturer will have to prepare the board first. After this, you use a pick and place machine to mount components on the board. The PCBA manufacturer heats the PCB at the right temperature in an oven. This technique is more convenient and reliable.

Inspection Methods for PCBA Electronics

Inspection and quality control are the final stages of PCBA. This aspect is very important in PCBA. In PCB assembly, there are different inspection methods.

X-Ray inspection

This inspection method is very technical as it involves the use of X-rays. You will use X-rays to check the PCB layers to detect any inconsistencies. If the X-ray detects any, there will be rectification. This inspection method is ideal for complex circuit boards.

Automated optical inspection

AOI incorporates the use of a machine. The automated optical inspection machine features several cameras. These cameras will scan and view the boards from various angles. The cameras will then detect any errors. This machine is common among PCBA companies.

Visual inspection

The visual inspection method involves using a manual process to inspect PCBs. This method is more suitable for inspecting a small quantity of PCBs. Visual inspection can’t be ignored in PCB assembly. In as much as it has its own limitations, its benefits can’t be overlooked.

What Does a PCBA Comprise?


A manufacturer mounts electrical components on the surface of a circuit board to produce a PCBA. A circuit board assembly comprises different electronic components.


Capacitors are electronic components on a circuit board. This component holds an electric charge and then releases it when there is a need for more power. Capacitors collect opposite charges on two layers to achieve this. This electronic component functions as a rechargeable battery. It saves electrical energy and then provides this energy when needed.


These are electronic components that regulate the electric currents that go through them. They also control the voltage in every component they are connected to. The absence of resistors in PCBA will lead to overloading. Without resistors, other components can’t handle the voltage. Resistors discharge electric power as heat. This component withstands the flow of current in a circuit board.


Transistors serve as the backbone of modern electronics. They are like the building blocks of today’s electronics. These components play a vital role in PCBA electronics. They act as insulators and conductors. These semiconductor devices can serve as amplifiers and switches. Transistors can function at lower voltage supplies without a filament current.


Diodes are electronic components that enable the flow of current in one direction. They serve as one-way switches. They allow the flow of current in one direction while restricting current flow in the opposite direction.


These electronic components save energy in a magnetic field anytime an electric current flows through them. Inductors block alternating currents and enable direct current to flow. These components can be used alongside capacitors to design tuned circuits.

It is very important one understands the functionality of these electronic components. They all make up a printed circuit board assembly. PCBA electronics exist due to these components. Electronic components play a vital role in PCB assembly.

Advantages of PCBA Automation

Printed circuit boards are the core of all electronics. Today’s electronics can’t exist without a PCBA board. As technology continues to advance, PCBs are now easier to design. All thanks to automation and machines. They have made the production of PCBA electronics a much easier task.

In the past, electronic PCBA was designed manually. This led to less consistency and slower production. PCB assembly automation offers various advantages to sectors and businesses. Below are some advantages of PCBA automation;

Consistent quality

Automated machines can perform the same task continuously without errors. They have helped PCB manufacturers design better and more accurate circuit boards. Automation helps you to get the accurate design for all circuit boards. With this advancement in technology, you can be assured of consistent quality.

Lower cost

The use of machines has contributed largely to the PCB industry. Manufacturers don’t have to spend so much on production costs again. The majority of SMT assemblers make use of software for PCB assembly. These applications are used before the actual PCB production. Doing this minimizes the risk of delays and errors. Automated PCBA also results in financial savings since the task will require fewer employees.

Reduction in error

Errors are most likely to occur during PCB assembly. The PCBA process is a task that requires carefulness and attention. While humans can make mistakes, these machines are less likely to make errors. These machines are designed to carry out certain tasks delicately and repetitively. Automated machines can assemble more boards in less time.

 Ideal for mass production

PCBA automation can minimize the costs and time for producing PCBs. Therefore, PCBs can be produced in higher quantities. Automated services will help you deliver consistent boards in a timely manner.

Short product development cycle

While hand-assembled boards may take a longer time to design, automated boards take a shorter time. An automated PCB assembly service will assure you of high-quality boards.

How to Choose a Good PCBA Electronics Company

For all PCBA companies, staying at the top of the game is important. That is why these companies keep up with PCBA capabilities. Before choosing a PCBA electronics company, it is important you take some factors into consideration. There are several PCBA electronics companies out there. However, it is vital you choose a professional PCBA company.


This is a great factor you need to consider. Experience is very important. You definitely want a company that has the required experience for your PCB assembly. The assembly of PCB is a daunting task that needs attention to detail. You will have to make an inquiry about the company you are opting for. How long has this company been existing? How many firms have they collaborated with and which? What kind of techniques do they employ for their PCB assembly? It is important you ask these questions.  

Customer support services

The customer service of the company you are opting for also matters. The support system of a PCBA company should pay attention to customer’s needs. This system takes your matter seriously and answers all your questions. For a great PCBA, you need a company with great customer support services.


This is another factor you need to consider. The employees of a PCBA company need to know what PCB assembly is all about. It is important you make some detailed inquires about the employees of the company. This will help you to choose rightly.

Testing and inspection options

The type of testing and inspection methods a PCBA company employs determines a lot. To achieve quality, proper testing and inspection technique is vital. Ensure you know the type of testing and inspection methods the company you are opting for employs. Some companies use automatic optical inspections while some use X-rays.


Cost will determine a lot of things. In the end, you want quality PCBA boards. These boards cost a price. However, some factors determine the cost of a PCBA. The quantity you order and the cost of shipping influence the cost of a board.

If you make a large order, you will pay more. The type of technique used for your board also matters. The cost of through-hole and surface mount technology differs.


A good PCBA company will offer quality products. You need to evaluate the quality of products offered by these companies. Ensure that the quality of the electronics PCBA meets your requirements. You should also make an inquiry about the type of equipment these companies use.  Also, check the reviews and feedback of customers.


Some companies work in line with the necessary standards. Ensure your PCBA Company has the necessary certifications. These companies operate according to the standard regulations and rules. Ensure you go for a company that has the right certification.

PCBA Capabilities

Components sourcing

The majority of PCBA manufacturers expand their network. The component sourcing is one the services offered by this company. This service has several benefits, one of which is line efficiency.

LED PCB assembly

LEDs are common in most electronics produced today. PCB manufacturers can now design a LED PCB that emits light anytime it is connected to a power supply. Since LEDs offer high-intensity and better quality, they are attached with PCBS. Flashlights, operating room lighting, and street light feature LED PCBs.

Through-hole assembly

This type of assembly is ideal for THT components. Through-hole assembly requires manufacturers to fix components on board through the holes.

BGA assembly

Ball grid array (BGA) features several bumps at the end part of the tube. These bumps provide an interconnection between the body and the base.

Prototype assembly

Some PCBA manufacturers offer fast prototype assembly. These services save time to market. Prototype assembly provides manufacturers with the opportunity to adjust and rework the circuit board.

Frequently Asked Questions

Why is PCBA electronics important?

Electronics PCBA is vital in the PCB industry. In today’s world, most electronic devices feature PCBA electronics. This board helps to improve the efficiency and productivity of electronic devices. Without a PCBA board, an electronic device can’t function. These boards serve as the backbone of most electronic devices.

What services do PCBA companies offer?

PCBA companies offer a lot of services. This includes SMT and through-hole technology and completed box build assembly. These companies also offer contract electronics.


PCBA electronics plays a vital role in electronics manufacturing. A PCB is different from a PCBA. Printed circuit assembly involves the mounting of electronic components on boards. PCBs are a blank board. These electronic components make them ideal for use in several applications. As technology continues to advance, the need for PCBAs continues to increase. Contract electronics companies also ensure the production of PCBA boards.