Powerfully Built USB Hub PCB – Made in China

PCBMay has been in the PCB industry for more than ten years. During this time, we have perfected PCB designs and manufacture.

  • Custom design of USB Hub PCB
  • The fast turn-around time, no waiting, no delays
  • Speedy and efficient customer service
  • Highly qualified engineering staff
  • Environmentally safe manufacturing and sourcing
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PCBMAY’s USB Hub PCB – Enhance Your Business Projects

We at PCBMay value quality and customer service equally. High-class materials are always used for the production of your USB Hub PCB order. In fact, we use premium materials for all your PCB needs. PCBMay can make up to 40 layers of PCBs without compromising product integrity.

You can trust us because we follow international standards on PCB production. Modern regulations ask PCB manufacturers to practice eco-friendly steps—we do this correctly.

Call us now! Your USB Hub PCB orders can’t wait!

Types of USB Hub PCB To Satisfy Your Demands

Single-sided USB Hub PCB

The best feature of the Single-sided USB Hub PCB is durability. This type of product is favored by customers who use it in simple applications such as small kitchen appliances, switches, etc.

Double-sided USB Hub PCB

Double-sided USB Hub PCBs are for those who need to complete complex projects than the Single-sided USB Hub PCB can handle. It is used for an expansion of the integrated circuit.

Type C USB Hub PCB

Type C USB hub PCB works well because it has a USB3.2 standard. This allows for speed. PCBMay’s Type C USB uses only the best quality surface finishes for ensure longer durability.

Micro USB Hub PCB

The Micro USB Hub PCB is for Micro USB plugs. Two hooks are at the bottom for holding cables securely. This is specifically designed for connectors slightly smaller than Type C.


The USB 3 Hub PCB is made for USB Type-A, Type B, and Type B Micro plugs. The advantage it sells is accelerated charging, so power delivery is the main point ensured.

Rigid USB Hub PCB

Customers buy Rigid USB Hub PCB because of its long shelf life. It can also be used as an expansion USB interface of Raspberry Pi or other chip development board products.

PCBMay is an Premium USB Hub PCB Manufacturer

We take you through a tour of PCBMay’s PCB production facilities. Here, where the USB Hub PCBs are made, the modern equipment used is shown.

After this video, you will put your trust in us because our manufacturing process is excellent. PCB May’s staff are always professional and courteous.

We value high standards in our PCB fabrication. Not only that, we follow international standards such as RoHS and UL. Because we are a global brand, we actively participate in PCB trade shows too.

VPC Plating Line

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USB Hub Production Details As Following Up

Brown Oxide
PTH Line
VCP Plating   AOI  Exposure E-Test
Layer Count1-40layers
Base MaterialKBShengyiShengyiSF305FR408FR408HRIS410FR406GETEK370HRIT180ARogers4350BRogers4000PTFE Laminates(Rogers seriesTaconic seriesArlon seriesNelco series)Rogers/Taconic/Arlon/Nelco laminate with FR-4 material(including partial Ro4350B hybrid laminating with FR-4)
Board TypeBackplane、HDI、High multi-layer 、blind&buried PCB、Embedded Capacitance、Embedded resistance board 、Heavy copper power PCB、Backdrill.
Board Thickness0.2-5.0mm
Copper ThicknessMin. 1/2 OZ, Max. 10 OZ
PTH Wall25um(1mil)
Maximum Board Size1100*500mm(43”*19”)
Min laser drilling size4mil
Min. Spacing/Tracing2.7mil/2.7mil
Solder MaskGreen, Black, Blue, Red, White, Yellow,Purple matte/glossy
Surface TreatmentFlash gold(electroplated gold)ENIGHard goldFlash goldHASL Lead freeOSPENEPIGSoft goldImmersion silverImmersion TinENIG+OSP,ENIG+Gold finger,Flash gold(electroplated gold)+Gold finger,Immersion silver+Gold finger,Immersion Tin+Gold finger.
Min. Annular Ring3mil
Aspect ratio10:1(HASL Lead freeHASL LeadENIGImmersion TinImmersion silverENEPIG);8:1(OSP)
Impedance control±5ohm(<50ohm), ±10%(≥50ohm)
Other TechniquesBlind/Buried Via
Gold Fingers
Press Fit
Via in Pad
Electrical Test

Here there’re many laminate material datasheets, they’re useful and helpful for you, please see them:

TU-872Modified EpoxyDOWNLOAD2003403.8-4.03.8
RO 3010Cer/PTFEDOWNLOAD50010.2
RO 4003Hydrocarbon/CerDOWNLOAD>2804253.38
RO 4350BHydrocarbon/CerDOWNLOAD>2803903.48
RT/duroid 5880PTFE/GlassDOWNLOAD5002.2
ISOLAPolyclad 370HRFR4DOWNLOAD1703404.8-5.1
HitachiMCL-BE- 67GModified EpoxyDOWNLOAD1403404.94.4
MCL-LX-67YSpecial LaminateDOWNLOAD185-195325-3453.4-3.6
NelcoN4000-13Modified EpoxyDOWNLOAD210-2403653.73.6
N4000-13EPModified EpoxyDOWNLOAD210-2403503.43.2
N4000-13SIModified EpoxyDOWNLOAD210-2403503.43.2
N4000-13EP SIModified EpoxyDOWNLOAD210-2403503.43.2
ArlonArlon 25NCerDOWNLOAD2603.38
Arlon 25FRCerDOWNLOAD2603.58
Arlon 33NPolymideDOWNLOAD>2503534
Arlon 35NPolymideDOWNLOAD>2503634.2
Arlon 85NPolymideDOWNLOAD2503874.2
StablcorST325DOWNLOADThermal conductivity:75w/m.k(with 1oz copper)
ST10DOWNLOADThermal conductivity:325w/m.k(with 1oz copper)
Bergquistht-04503DOWNLOADThermal conductivity:2.2w/m.k(with 1oz copper)


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UPS Forwarder

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TNT has 56,000 employees in 61 countries.
It takes 4-9 business days to deliver the packages to the hands
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TNT Forwarder

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It takes 4-7 business days to deliver the packages to the hands
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Fedex Forwarder

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If your order is of large volume with PCBMay, you can also choose
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    PCBMAY – The USB Hub PCB Specialist

    Digital Projects necessitate the use of USB hubs. USB hubs are plugged in your computer so you can plug in as many devices as you need. What makes the USB hub run is the USB Hub PCB.

    The quality of PCBMay’s USB Hub PCB is excellent. We make sure that we follow all the standards so you don’t need to worry. We are confident in selling you our Type C, Micro, and USB 3 Hub PCBs.

    • Up to 100 ports each can be made
    • Adequate upstream ports and downstream ports
    • Labeled correctly as self-powered or bus-powered
    • Designed correctly to avoid overpowering plugged-in devices
    • Correct configuration for bus-powered for adequate power supply

    Our proven record of being the PCB Expert in China draws customers to us. We make USB Hub PCBs for both local and global customers. They are satisfied and happy because not only can we produce in bulk, we do so quickly too.

    The USB Hub PCBs we make pass IPC standards 2 – 3. This means they are high-class products that won’t fail you when you need them. In addition, the whole range of our USB Hub PCBs holds up to the USB-IF specifications. We make sure to use the correct soldering method as well as the correct IC components.

    USB Hub PCB

    PCBMay is also strict on quality assurance. In cases where customers request a more detailed report, we can give a full 8D report. We are confident to show how our USB Hub PCBs, multilayer PCBs, and HDI PCBs are made. You can request a third-party audit if you really want to make sure.

    For big orders, we understand how important it is to get the details accurately. We will give you a free sample to make sure we did the prototype correctly.

    What are you waiting for? Call PCBMay now!

    USB Hub PCB: The Ultimate FAQ Guide

    Are you struggling with the functionalities of your digital projects?

    USB hub PCB is a reliable solution to control multiple devices connected to your host system. Its outstanding functionality in electronic appliances significantly improves signal transmission.

    PCBMay manufactures different types of USB hub PCBs. The quality of PCBs that control USB hubs is excellent. You will get all the necessary information about PCB manufacturing through this FAQ guide. Let’s make a move.

    What Is A USB Hub PCB?

    USB hub PCB is an effective circuit board to run USB hubs. Usually, computers are designed with USB hubs so that the users can plug in many devices as required. This PCB controls sufficient upstream and downstream ports of USB hubs.

    It ensures high-speed signal transmission in different electronic devices connected to a multiport USB hub. Again, It improves the functionality of the charging devices to a great extent. Easy processing along with durable design make USB hub PCB effective for kitchen appliances, switches, etc.

    This PCB has a long operating life. Besides, proper impedance control and thermal management turn this PCB into an automatic choice for high-frequency electronic projects.

    USB Hub PCB

    USB Hub PCB

    How Does The USB Hub PCB Function?

    USB hub PCB offers superlative functions in modern electronic appliances. It enables a single USB (Universal Serial Bus) to connect multiple devices to a host. This PCB ensures smooth data transmission through the USB hubs.

    Usually, a USB hub contains adequate upstream and downstream ports. Signals of different frequencies are received from the host system through upstream ports. Then, these signals are transferred to the devices which are connected to the downstream ports.

    USB hub PCBs consist of effective components like transmitter, antenna, diode, etc.  These components control signal transmission from the host to the destination port.

    USB 3 hub PCB allows the USB hub to send data directly to the destination. It reduces additional power consumption by decreasing the signal level in the USB network.

    USB Hub PCB Functionality

    USB Hub PCB Functionality

    What Are The Significant  USB Hub PCB Types?

    There are significant types of USB hub PCBs used in numerous applications. All of its types have supreme functionality that improves the quality of the data propagation system. Its major types include-

    • USB Type-C Hub PCB
    • USB 3 Hub PCB
    • Micro USB Hub PCB
    • USB hub single-sided PCB
    • Rigid USB Hub PCB

    High-Quality USB 3

    High-Quality USB 3.0 Hub PCB

    Which Materials Are Used In USB Hub PCB Construction?

    USB hub PCB is composed of different dielectric materials that have supreme durability. Its base materials are FR4, FR5, CEM-1, CEM-3, copper-clad, etc. These PCB materials ensure sufficient resistance against chemical contaminants and thermal pressures.

    Dielectric materials render adequate insulation in the USB hub circuit board. That’s why it can handle larger current loads. This high current PCB keeps the data propagation rate consistent.

    USB Hub PCB FR4 Materials

    USB Hub PCB FR4 Materials

    Moreover, FR4, composite epoxy resins remain functional against high temperatures. The decomposition temperature of this circuit board is also high due to these materials.

    That means USB hub PCB materials play a crucial role in promoting PCB performance, both thermally and electrically.

    What Are The Applications Of USB Hub PCB?

    USB hub PCBs are very common in versatile basic and advanced electronic applications. These circuit boards are mainly used in devices where multiple connections are required.  Prominent applications of these PCBs are-

    USB Hub PCB Applications

    USB Hub PCB Applications

    How To Compare Between USB 3.0 Hub And USB 2.0 Hub PCBs?

    USB 3.0 and USB 2.0 hub PCBs both offer distinctive positive features in digital projects. But, USB 3 hub PCB has superior acceptance in the PCB world due to its higher functionality.

    Here, a comparative analysis between these two PCBs is given for your convenience.

    Speed Control

    USB 3 hub PCB has a good command over the speed of signal transmission. It deals with around 5 Gbps raw bandwidth. On the contrary, the USB 2.0 hub offers up to 480 Mbps raw bandwidth.

    Power Management

    USB 3.0 hub PCB is capable of handling 900 mA current in each port. Again, it can reduce power consumption when optimum power is not necessary. But, USB 2.0 hub circuit board renders poor power management compared to the USB 3 hub PCB.

    Signal Routing

    USB 3 hub is compatible with point-to-point packet routing while sending data from host to connected device. This PCB enables the USB hub to conserve the system power because of such signal routing.

    USB 2 hub PCB utilizes broadcast-to-all-points signal routing. It is not effective for low power consumption during signal transmission.

    Data Buffering

    PCB used in USB 3 hub permits data buffering to a large extent. It enables the universal serial bus 3 hub to store superspeed packets for some moments in a buffer. Then, these packets can be retransmitted at a suitable time slot in superspeed data paths.

    But, USB 2 hub PCBs don’t offer data buffering features for transferring high-speed signals.

    USB 2.0 Hub Vs USB 3

    USB 2.0 Hub Vs USB 3.0 Hub

    Cost Performance

    USB 2 hub circuit boards are less expensive compared to USB 3 hub PCBs. In the case of USB 3 hub circuit boards, you need to apply additional connecting wires than the USB 2 hub.

    Moreover, USB 3 hub PCB requires multilayer stackup to deliver optimum performance. These factors increase the expense to a large extent.

    What Are The Features Of USB 3 Hub PCB?

    USB 3 hub PCB has brought out a revolutionary development in the electronics world. It offers tremendous features that significantly improve the quality of the device. Its most noteworthy features are-

    • It is compatible with Type-A, Type-B, and Type-C micro plugs.
    • High operating temperatures.
    • Bandwidth is 5 Gbps
    • Low coefficient of thermal expansion.
    • This PCB accelerates the charging system. That’s why it ensures smooth power management.
    • Low relative permittivity
    • High TG PCB
    • It uses point-to-point packet routing technology.
    • It allows the transmission of signals from the base computer to the port.
    • This is resistant to moisture and chemical contamination.
    • High dielectric strength

    USB 3 Hub PCB Features

    USB 3 Hub PCB Features

    What Are The Major Advantages Of Powered USB Hub PCB?

    Powered USB hub PCB is a highly operative electric circuit board. It contains AC adapter plugs connected to the mains. That means this PCB is capable of powering without using an external power supply.

    Powered USB hub PCB comes with various advantages. Some of its notable benefits are explained here.

    Self Power Generation

    A powered USB hub can generate power by itself. It receives power from the AC adapter connected to the hub rater utilizing the battery of your computer. This is a huge advantage for the consumer. This own power generation enables the USB hubs to continue their working without compromising the speed.

    High Connectivity

    PCB used in a powered USB hub allows connecting multiple devices on a single computer. It makes data transmission easier and quicker. Again, powered USB hubs can be used in developing charging appliances.


    The powered USB hub provides superlative functionalities in powering multiple devices at the same time. It can handle high-voltage signal transmission with great reliability. USB hub PCB that remains inside makes these things possible.

    Besides, this PCB is compatible with both multilayer and single-layer designs. So, you can utilize it as per your project demands.


    This PCB offers impressive durability in extreme situations. Powered USB hub PCB materials are highly durable and their thermal performance is commendable. So, it remains operative in high heat or extreme cold conditions.

    Most noteworthy, it supports surface finishes and conformal coatings on its surface. Thus, its moisture absorption rate is negligible.

    Component Management

    Powered USB hub PCB deals with large-scale components like scanners, hard drives, printers, etc. It can control signal transferring in many demanding devices at a time. This feature makes it a reliable option for those who need to deal with multiple USB devices.

    Easy Assembly

    Multiport USB hub PCB assembly and design are not very complicated. You don’t need to take additional care during PCB assembly.

    Reliable USB Hub PCB

    Reliable USB Hub PCB

    Signal Integrity

    It ensures the integrity of transmitted signals in high-frequency applications. Usually, you don’t face any case of losing data while the signal is transmitted between the host and downstream ports.


    This PCB turns into a cost-effective circuit solution in the long run despite its high initial costs. Its long operating life along with outstanding performance make you feel happy about your choice.

    What Is The Power Distribution Process Of Micro USB Hub PCBs?

    The micro USB hub PCB is used in micro USB plugs. This circuit board is mainly designed for USB connectors which are smaller in size compared to USB C hub PCB. Micro USB hub circuit board, containing two hooks for holding cables, properly distributes USB power.

    It enables the micro USB hub to manage a double power supply. That’s why this USB hub can distribute sufficient power to each peripheral connected to the downstream ports.

    You need to ensure the polarity of the power supply. Improper polarity causes serious damage to micro USB hubs and the devices attached to these hubs.

    Micro USB Hub

    Micro USB Hub

    What Is A High Current Multi-port USB Hub PCB?

    A high current multi-port USB hub PCB controls the operations of a multiport USB hub. This PCB usually switches the USB hub between the synchronizing state and charging state through a microcontroller.

    Here, the charging state deals with high current loads where the synchronizing state is a low-current state. This multiport USB hub circuit board allows the conduction of more than 2A current in each device connected to the hub.

    Multiport USB Hub PCB Design

    Multiport USB Hub PCB Design

    There is a power field-effect transistor on the PCB surface. This FET controls the current transmission to different ports concerning their states. Besides, this circuit board holds a current sensor that detects the current flow in upstream and downstream ports.

    The microcontroller evaluates the charging state of the device. Then it indicates the actual state of the device whether it is charged or charging.

    What Are The Limitations  Of USB Hub PCB?

    USB hub PCB also has some negative sides. You must consider its limitations while choosing it for your electronic application. Its considerable limitations include-

    • Its primary cost is a little bit high.
    • Sometimes, it suffers from low speed in charging multiple devices.
    • Unpowered USB hub PCBs can’t supply power to the components without reducing effectiveness.

    We design cost-effective and durable USB hub circuit boards. Besides, we can assure you of using proper soldering and IC components. So, inquire us immediately to enjoy USB hub PCBs having USB-IF specifications.

    How Does USB Hub PCB Control Speed In Signal Transmission Systems?

    USB hub PCB superbly controls the speed in the signal transmission system. Especially, PCB used in the USB 3 hub enables it to send data directly from the computer to the peripherals. It uses point-to-point pocket routing during data transferring.

    Moreover, this PCB permits a data buffering system. This enables the host can send high-speed data at a convenient time slot. Micro USB hub PCB utilizes a double power supply mechanism. So, it can transmit the necessary power to all ports that significantly improve data transmission speed.

    USB Hub PCB Speed Control

    USB Hub PCB Speed Control

    This PCB design is resistant to EMI. So, you can be sure about the optimum integrity of the signal. That means the USB hub PCB provides commendable performance in transferring high-speed signals.

    What Are The Properties Of A Reliable USB Hub PCB  Manufacturer?

    A reliable USB hub PCB manufacturer is capable of delivering PCB products according to your need. So, you need to give supreme priority to choosing a trustworthy manufacturer.

    If you find the following properties in a manufacturer in China, you can rely on it.

    Long Manufacturing Experience

    A trusted manufacturer should have enough experience with USB hub PCB assembly. Experience is required for solving minute complications during fabrication and design.

    High-quality USB Hub Production

    You need to choose a manufacturer that can produce USB hub PCBs passing IPC standards 2-3. That means you should make sure of its capabilities of producing high-class products.


    USB hub circuit boards are costly compared to other PCBs. But, you have to find a trusted manufacturer in China which offers competitive costs for different types of USB hubs.

    Customer Service

    Full-time proper customer service is a must for a PCB manufacturer. You can check out customer reviews and manufacturing history to get ideas about its service.

    Skilled Technicians

    Your USB hub circuit board manufacturer should have a well-structured factory along with a group of skilled, RoHS-certified technicians. They can provide you with custom solutions as per your requirement.

    USB Hub Circuit Board Manufacturing

    USB Hub Circuit Board Manufacturing

    We have been manufacturing high-class USB hub printed circuit boards for more than 15 years. Our USB hubs are designed correctly so that no overpowering occurs. Contact us for getting the prototype PCBs for your projects.

    Which Guidelines Do You Need To Consider While Designing A 2 Port USB 3 Hub PCB Layout?

    It is important to design 2-port USB 3 hub PCB layout properly to achieve impedance stability. So, you need to consider some guidelines while designing this PCB. Such as:

    • USB 3 circuit board signal traces should be accommodated in the multilayer PCB stackup.
    • All PCB components must be placed on the upper side of the PCB.
    • The minimum trace width is around 4 mils.
    • USB 3 signal traces need to be placed on the top of the circuit board.
    • The minimum spacing between differential pairs is 5 mils.
    • Layer 2 should be the reference ground plane.
    • The third layer should be the ground plane.
    • Layer 4 is used for placing a 3.3 V power supply and other traces.
    • The use of PCB via and 90-degree corners should be minimum. It improves high-speed signal routing systems.
    • You should place ESD connection points in the same line of high-speed signal traces. It minimizes the reflections that are caused by discontinuations of routing.

    Watch the following video to know about designing a USB hub PCB module:

    USB Hub PCB Design

    USB Hub PCB Design

    How To Verify The Performance Of  A  USB Hub PCB?

    You can verify the performance of USB hub PCBs through various tests. In-circuit tests, flying probe tests, automated optical inspection, automated X-ray inspections, etc are reliable methods for this PCB.

    Among them, Automated tests are more reliable than manual tests. Here, we are going to explain the AOI test that delivers the most trustworthy outputs while checking a USB hub PCB.

    AOI (Automated Optical Inspection) Test

    It usually detects two types of failures of a USB hub PCB.

    • Catastrophic failures. It refers to the missing PCB component in the layout.
    • Quality defects. These are about the component skew, fillet size problems, improper solder joints, etc.

    The AOI test is a visual inspection where an AOI machine takes 3D images of your USB hub PCB. Then, this machine makes a comparison between your PCB and a perfect PCB design. Thus, it can detect faults of the USB hub circuit board within a short time.

    PCB AOI Test

    PCB AOI Test

    This test provides the result very fast. But, it is also expensive. So, you need to apply this test for high-volume PCB manufacturing. For small-scale productions, the flying probe test along with a functional test is perfect.

    How To Build A  4-port USB Hub PCB?

    To build a 4-port USB hub PCB, you need to pay careful attention to soldering, layout designing, etc. You can follow the steps given below to ensure the hassle-free making of a 4-port USB hub circuit board.

    Component Arrangement

    First, you need to get all the required components together. Such as:

    • A PCB
    • USB hub controller
    • Three terminal regulators for the power supply
    • Microchip
    • Capacitors
    • Resistors
    • Crystals

    Circuit Board Processing

    It is the most vital part of this making. In this stage, you have to etch the PCB that is made of copper-clad. It needs to be cleaned and covered with an etch resist. You can apply a needle to identify the etching area.

    That means outside of that line the unnecessary copper needs to be removed.  Then, you have to place the circuit board in an etching solution. Sufficient current flow ensures the complete etching of the pattern.


    After completing etching successfully, you need to solder the PCB components. You can apply THR (Through-hole Reflow) or wave soldering for the regulator, resistors, capacitors, etc.


    Then, you should conduct a test to check the component placement, soldering, etc. If you can detect any problematic issue, you must solve it as soon as possible. After plugging the device, you will get the confirmation of the errorless connection of PCB board upstream ports.

    Connecting Downstream Port

    After the completion of connecting upstream ports, you have to connect the downstream ports to the circuit board. Then, a 4-port USB hub PCB board will be ready for use. Watch this video to get a better idea:

    Is USB-C Hub PCB Compatible  With USB-A Port?

    USB C hub PCB has compatibility with different USB ports. It offers faster and versatile data propagation than type-A USB hubs. Its compatibility with USB-a ports depends on voltage and power ratings.

    If you connect a Type-C USB hub with 5V/3A or5V/1.5A connections, then it is compatible with USB-A ports. That means you need to ensure proper voltage supply to the circuit board for making a Type-C USB hub operative to USB-A ports.

    Type-C USB Hub PCB

    Type-C USB Hub PCB

    How To Control Impedance In A  High-frequency USB Hub PCB?

    Impedance control is a vital issue in USB hub PCB manufacturing. You need to take care of factors that affect impedance in the PCB transmission line. Such as:

    • Dielectric constant
    • Dielectric thickness
    • Trace width
    • Copper thickness

    It is important to use dielectric materials that have a low and stable dielectric constant. High and unstable DK is not good for impedance stability in high-frequency signal transmissions.

    Besides, heavy copper PCB with low dielectric thickness is appropriate for controlled impedance. It also improves the current conduction capacity in upstream and downstream ports of the USB hubs.

    USB Hub Impedance Control Module

    USB Hub Impedance Control Module

    Which Component Mounting Is Effective For Micro USB Hub PCB Assembly?

    SMT (Surface Mount Technology) is the most effective component mounting process for micro USB hub PCB. SMT deals with surface mount devices that support miniature designs of electronic devices.

    As micro USB hub PCBs are used for smaller USB plugs, SMDs are perfect in this case. Besides, Surface mount technology allows compact placement of the PCB components. So, you can make the high-density PCB design successful by using SMDs.

    Surface Mount Technology In PCB

    Surface Mount Technology In PCB

    SMDs are less expensive than the devices that support through-hole technology. This mounting ensures sufficient robustness in the PCB design. So, SMT is the best option for USB hub PCB component mounting.


    USB hub PCB includes multiple benefits to electronic gadgets. It helps to avoid overpowering in the case of plugged-in devices. You can find this PCB in almost every advanced appliance nowadays.

    PCBMay offers effective prototype PCB designs and trustworthy large-scale production facilities. We hope this FAQ guide will solve your problems related to device control. Contact us to enjoy the advantages of using multiple devices on the same computer.

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