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Simon / 2021-02-25

Contents [hide]

What Is SMT?

SMT or the surface mount technology is a new design used to arrange components printed on a circuit board. The previous versions used in the mounting of the circuit involved board components using holes. With this method, careful preparation was needed to ensure that all the leads used form the right technique and fit various boards. It also requires a large board that can fit multiple circuits.


But with the SMT, the assembling process is efficient since the components are soldered directly on the board. Since this technique does not require the passing of the leads through the PCBs, the assembling process is simple, efficient, and cost-effective. Besides, the SMT will save space as it can be mounted on both sides, allowing more components to be hosed on a small board. Thus, this is the reason modern devices are small despite packing lots of features.



When working with a small component, the possibility of error is high, but with the SMT, mistakes can easily be fixed using a molten solder. With the previous visions, fixing errors was lengthy and complicated; the use of SMT means that one will get reduced radiations. The wire attachment is low, and there is no drilling of holes on the board and is suitable during these technology times.


The SMT features are that there is no lead present, and if there are any leads available, they are short. The SMT also has the primary component and the solder joint on the same PCB side.

What Is SMD?

Surface Mount Devices or the SMD are the components fitted onto a printed circuit board. These devices are ideal in a world that is always looking for faster, flexible, and cost-effective devices. Thus, this is the reason that SMD has evolved significantly. Previously, the SMD was wired onto the circuit boards; the new SMD uses pins that can be soldered directly on the PCBs.


With the SMD, smaller components can ensure you achieve the same functions. If so, components can not only fit into a small space; they are also more functional. Thus, making it possible to provide more circuits onto the board, and since no drilling is needed, the process is fast and cost-effective. Another reason to use the SMD is that in case of any errors, small mistakes are corrected automatically as the surface tension of the molten pulls components. It also offers fewer unwanted RF signal effects and high-frequency performance.


Since they are small, easy to use, you will find that they are less costly than the devices that will require you to drill a hole to install. The features found in the SMD are miniaturization, do not have a lead of any kind, and are suitable for surface assembly on PBC.


Types of SMD

The SMD components can be classified as follows: 


  • Chip Resistors

The chip resistor has three digits found on the chip resistors' body, and these digits indicate the resistance value.


  • Network Resistors

These are packages that have several resistors found in the same parameters. What you should note is that they are applied to the digital circuits.


  • Capacitors

The capacitors are the most used Multilayer Ceramic Capacitors. The standard capacitors on the market are the Tantalum capacitors and the aluminum capacitors. However, you need to distinguish the two's polarity.

  • Diode

This is a wide applied SMD component. What you need to note is that the diode body the side with the color ring.


  • LEDs

The LEDs are divided into ordinary LEDs and those with high brightness like white, yellow, red, and blue. To determine, the LED polarity should be based on certain product manufacturing guidelines.


  • Transistors

In most cases, the structures are the NPN and the PNP. They can either be Inductors, Transformers, fuses, Crystal Oscillators.


  • IC

These are integrated circuits and have important and functional components or electrical products. These packages are complex and can be introduced in a detail later.

What Is the Difference Between SMT and SMD?

The SMT uses a mounting technology of mounting and soldering surfaces that will be used on the PCB. On the other hand, the use of the SMD refers to using the electronic component that can be placed on a PBC by using the SMT tools. The technique uses components that are soldered on the PCB using a soldering paste.

When it comes to manufacturing the SMT is one that is mostly used since it is cost-effective. The SMT will also offer stronger bonds, ideal for components that are under stress, and one that is good for prototyping.

Where SMT and SMD Combine

When looking into SMD Vs SMTwrite, the SMT and the SMD were both placed using hands. The machines could be used on some of the pieces but were limited to the size and the type that was used. However, the manufacturing boards use the SMT offers a faster way of making devices. In the past small bits of silver were used in the attaching of the components. Though these components are used in the present, they come in a mixture of flux solder. The best part is that they work fast combing thousands of SMD compared to the few hundreds that were fixed by hand.


When it comes to the PCB assembly what you should note is that both the SMD and the SMT can be used. The technique that will be used will depend on the materials used. What you need to note is that you can use both the SMT and the SMD on the PCB assembly. The important thing is to make sure that you have the right gadgets for the pro


As technology advances, so do the way things work and one of the things that has changed is the way components are printed on a circuit board. Gone are the days when people used overly large and slow machines. With the new technology, it is possible to enjoy fast and efficient services from compact devices. All you need to is to make use of the SMT or the SMD technology.