PCB Assembly – How Important Is The Cabling?


PCB Assembly – How Important Is The Cabling?

PCBs play an important role in the overall functionality of electrical and electronic devices. And, with the amount of dependency we have on such devices today, it is crucial that lots of emphasis is paid onto manufacturing the perfect PCBs. After all, it is the PCB assembly from India that decides the performance of a device; and if any problem, the PCB will be to blame for. Not only is it important to focus on how the components are placed on the circuit board, but it is also crucial to monitor the type of cabling that is used. Nevertheless, even if all the components are perfect, and the placement is perfect too, any problem in the cabling may also result in either a zero or erroneous performance. And, as a professional and dedicated manufacturer of PCB assembly from India, no one would like any complaints with their products. This is why we, at Miracle Aerospace, use only the best materials and processes so that we can deliver the best products to our clients. Our AS9100D, ISO 13485:2016, and QMS ISO 9001:2015 certifications clearly prove that quality is embedded in every single production process to completely guarantee the quality and performance of our PCB assemblies.

While every qualified manufacturer will know how to make the perfect PCB with the most appropriate cabling, as a user, you must also be educated for the same.

Circuits and conductors

It all begins with how the network of circuits and conductors is formed. The circuits are the primary channels of electrical flow, which can significantly impact performance. First and foremost, the base of the circuit is decided. The material used should be such that it works well with any kinds of cable assemblies to facilitate current and termination, while limiting corrosion. One such exceptional material is copper. This conductive material fulfills all the requirements, while also being cost-effective. Depending upon the cable assemblies that are to be used on the PCBs, the type of conductor is decided – whether it should be used as a solid piece (for solid wires) or as multiple thin strands (for flexible assemblies).


Next in line comes the insulation. How will the cable assemblies be insulated? The two primary types of insulations used include thermoset types and thermoplastic types. The choice made will depend upon the conductors being used, the specific application of the device, and the nature of the PCB assembly. Secondary factors to consider include the temperature of application, voltage levels, chemical exposure, moisture exposure, and nature of the external environment. Proper insulation will protect against any negative or extreme environments and factors.


Being used in a PCB, it is obvious that the cable assemblies will be exposed to regular electromagnetic environments. Thus, the cables must be shielded against such interference so that there are no problems faced in aspects of performance. The best option that is most popularly chosen for PCB assemblies is a thin metal foil held together by polyester. This is the most cost-effective option that is highly flexible, and also efficient at performing at high frequencies. Another option is a series of small-diameter wires, which can prove to be effective for low frequencies and excellent flexibility. In addition, a twisting conductor should be chosen to facilitate effective flow of current, even when individual cables within an assembly need to be twisted.


Last but not the least, the outer sheath or jacket is one of the most crucial elements. This outer covering is most responsible for protecting the underlying cable assembly. Thus, it needs to be tough, durable, flexible, chemical resistant, and fire resistant, so that it can be used in any kind of environment. At times, it is also necessary that the outer jacket conducts electricity to a certain extent. Some of the most popular options used for jacketing a PCB cable assembly are PVC, elastomers, fluorocarbons, and non-halogens. The material will be chosen depending upon the specific application and requirements.