Cracking the secrets of blue PCBA

Cracking the secrets of blue PCBA

Table of Contents


One of the key aspects of electronics is the printed circuit board. Creators shape them so that conductive tracts, pads, and other constituents slotted from sheet layers of copper folded up onto a non-conductive surface structurally sustain want electrically link electronic components.

In contrast to other circuit boards in the market, blue PCBA boards are unique. Although there’s no noticeable difference between a blue PCBA and other colours of PCBAs, blue PCBA electronics have increased in demand among technicians and electrical engineers due to their appealing colour. But, is it merely a matter of colour only?

This article covers everything you want to understand regarding blue PCBA, from what they are to what characteristics they have, as well as the importance of its blue colour.

blue PCBA

What does PCBA stand for?

PCBA  is an abbreviation for Printed Circuit Board Assembly and it refers to the component placement on the bare board or PCB. Several electronic components are connected to the PCB board after being arranged.

A PCBA is a perfect combination; has most of the required elements and is operationally feasible for its intended function.

Inductors, modules, triodes, diodes, capacitors and resistors and just a few of the devices that can be embedded in a PCB assembly. Therefore, PCBA means the entire electronic control unit.

What is the difference between PCB and PCBA?

PCB and PCBA are two distinct things in the same entire process. A PCB is a blank circuit board without any electronic component connected, whereas a PCBA is a finished assembly that includes all the elements required for the board to work effectively for the target purpose. A PCB has not yet been operational, whereas a PCBA is liable to be used in an electronic appliance. 

Because of the multiple methods and elements engaged in PCB assembly, producing a blank board is an easier method than generating a finalised PCBA. A PCBA also charges more to develop than a blank PCB. However, both procedures are required to build a completed board. A PCBA cannot be made without a PCB. The initial stage in the process is PCB production, and the second step is PCBA creation.

One more difference is the way PCBs and PCBAs are packaged. PCBs are usually vacuum- packed, whereas PCBAs entail fractional or anti-static packaging.

What does blue PCBA mean?

Blue PCBA means the processing and assembly of blue PCB.PCBs are used in all electronic devices, even the most basic. One of the most striking features of blue PCBs is that they’re colour-coded. A few of the most popular PCBs are blue, green , black, red, purple, white and transparent.

As compared to other circuit boards in the market, blue PCBA gets people curious about what variation they create to the PCBA board’s performance.

Blue PCBA enables the integration of data or electrical circuits into a working hardware component. They provide electrical connections as well as technical assistance via conductive tracks.

Blue PCBA are blue not because their colour, pigment, or mark is blue, but because they resemble a solder mask. The blue colour matches the solder mask that shields the board’s copper cables. It is similar to Arduino blue.

solder mask

How do PCBs come in different colors?

Every board’s colour scheme is unique and it is usually determined by the creator’s personal choices unless the client has clarified specific requirements.

  • Green

Green is the most frequent colour of a normal PCB and it has been for many years, if not decades.

  • Blue

In terms of demand and presence, the blue circuit board ranks second to the green circuit board. Because of the difference between the colour and the copper wires, it is easy to assemble and fix.

  •  Yellow

Yellow provides more detail in terms of detectable comparison between residues and empty spaces. It is close to the green PCB due to its performance and maintainability.

  • Red

Red PCBs are helpful while using magnification to identify issues on the board trails that require magnifying lenses.

  • Purple

Purple is not a common colour for PCB production. You will have to pay extra money for this colour. The visible contrast on the purple PCB is high, and the total maintainability is upgraded.

What is solder mask?

A solder mask is a narrow lacquer-like polymer layer that is typically applied to the copper residues of a PCB to defend them from oxidation and to protect solder bridges from constituting between solder pads.

A solder bridge is an improper electrical link between two conductors made with a tiny clump of solder, which can be avoided with solder masks. A solder mask is not used for hand soldered structures, but it is essential for mass manufacturing boards soldered instantly with reflow or solder bath methods.

Is blue PCB better than green PCB?

PCBs are green, or at least the majority of them are. Green enhances the visibility of the PCB. Because the green PCB creates strong contrast with the white text, it improves clarity. Furthermore, the green PCB surface treatment will reflect minimal light, lowering the blaze. As a result, green PCBs are needed for PCBs that need a detailed examination. In conclusion, the green PCB performs better than the blue PCB.

What products are commonly used blue PCB?

Industrial machinery.PCBs are normally found in dynamic industrial machinery. Blue PCBs are commonly used in industrial machinery to meet high demands. Thick copper blue PCBs can be widely used in industrial machines like factory load testers, high-current battery chargers and motor controllers.
Blue PCB in electronics

What should be paid attention to during blue PCB assembly?

  • PCB board cleaning requirements
The board surface must be neat and clean, with no element pins, tin beads, or blemishes. There should be no filth due to soldering, particularly at the solder joints.
  • PCB board through a reflow oven
Because the tin flow scrubbed the studs of the plug-in elements, a few of them will be slanted after the reflow oven is soldered, allowing the component to surpass the silk screen frame. As a result, after the tin heater, the recovery soldering personnel must make the necessary adjustments.
  • Board edge
Once all components have been fitted, they must not stretch beyond the perimeter of the PCB board.
PCB assembly


PCBs and PCBA have altered and modified the function of many electronic devices. They are now found in everything from desktop computers to high-end industrial machinery.

Many appliances have become smaller, more effective, handier, and cost-effective as a result of this technique of smoothly interlinking electronic systems on a thin, rigorous, but enhanced board.Its ideal material and PCB design combination has made it suitable for almost any customer or commercial appliance.

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