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Are you in search of superior Through-Hole PCB Assembly services? Choose South-Electronic for unparalleled quality, dependability, and exceptional value in your PCB assembly needs. Experience the difference with our one-stop Through-Hole PCB Assembly service – from initial design to final assembly, we ensure precision, durability, and compliance with the highest industry standards.

Your Trusted Supplier of Through-Hole PCB Assembly

Welcome to South-Electronic, where you’ll discover top-tier Through-Hole PCB Assembly services known for their excellent precision and reliability. Our Through-Hole PCB assemblies deliver outstanding performance, making them perfect for a wide range of applications. Explore options such as single-layer, double-layer, and multi-layer boards, all customized to fulfill your specific electronic requirements. Whether you’re enhancing efficiency in consumer electronics or need reliable operation in industrial controls, our Through-Hole PCB Assembly services stand out in ensuring efficiency and precision. Trust South-Electronic for exceptional quality and consistency in your electronic ventures. Our Through-Hole PCB assemblies boost your devices’ functionality with superior reliability and performance. Partner with us for excellence and innovation in your field.

Elevate Your Projects with South-Electronic's Through-Hole Assembly Solutions!

At South-Electronic, we focus on bespoke solutions that address the unique demands of your projects. We are pioneers in Through-Hole Assembly technology, offering unmatched customization and precision. Our team is committed to delivering the technical expertise and innovative solutions necessary for your project’s success. Rely on our Through-Hole assemblies for enhanced performance and robustness in your electronic devices.

Seamlessly Tailor Your Through-Hole PCB Assemblies with South-Electronic

Experience the simplicity of customization with South-Electronic as we streamline the process of obtaining your bespoke Through-Hole PCB assemblies, eliminating common challenges. Our efficient four-step method ensures comprehensive support at every stage:

Consultation and Design:

We start by understanding your specific needs to design the perfect PCB assembly for your application.

Material Selection and Prototyping:

Choose from a range of components and finishes, and we’ll create prototypes to ensure the design meets your expectations.

Precision Manufacturing:

We utilize advanced manufacturing techniques to produce high-quality custom PCBs.

Quality Assurance and Delivery:

Each PCB assembly undergoes rigorous testing to meet our stringent standards before timely delivery.
Common Questions

Most Popular Questions

Through-Hole Assembly (THA) is a method of constructing electronic circuits in which the component leads are inserted into drilled holes on a printed circuit board (PCB) and soldered to pads on the opposite side. This technique provides strong mechanical bonds making it ideal for components that endure physical stress.
Unlike SMT where components are mounted directly onto the surface of the PCB, THA involves inserting leads into pre-drilled holes. This generally makes through-hole components larger and better suited for high-reliability applications where durability is crucial.
Key tools include a soldering iron, solder, a desoldering pump, tweezers, and a magnifying glass or microscope for inspecting solder joints. Automated tools can include wave soldering machines and selective soldering machines for larger volumes.
Components that require strong mechanical bonds and can withstand higher voltages and currents, such as capacitors, transformers, and connectors, are typically used in THA due to their larger size and enhanced durability.
Yes, many PCBs incorporate both through-hole and surface mount components to take advantage of the strengths of each technology. This is known as mixed technology PCB assembly.
The main advantages include stronger mechanical bonds, ease of manual adjustments and replacements, and better performance in extreme environments. It's also often preferred for testing and prototyping due to its simplicity in swapping components.
THA is generally more time-consuming and expensive compared to SMT due to the need for drilling holes and the additional labor for manual soldering. It also limits the available routing area on multilayer PCBs.
In mass production settings, through-hole components are often soldered using wave soldering or selective soldering techniques that allow for quick and efficient processing of large quantities of PCBs.
Designers must consider the space for holes and ensure there is enough room on the PCB for both through-hole and any surface mount components. Thermal management and the physical layout to withstand mechanical stress are also important.
Quality is maintained through careful inspection of solder joints, often with the aid of magnification and testing for electrical functionality. Standards such as IPC-A-610 are commonly followed to ensure high-quality soldering and assembly.

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Complete Guide to Through-Hole Assembly


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Introduction to Through-Hole Assembly

Through-Hole Assembly (THA) is a method of electronic component assembly that involves inserting the leads of components through pre-drilled holes on a printed circuit board (PCB) and soldering them on the opposite side. This technique was the foundation of PCB assembly before Surface Mount Technology (SMT) became popular. THA is particularly valued for its strong mechanical bonding of components, making it ideal for applications involving physical stress or high reliability, such as in aerospace, military, and automotive industries. Despite the rise of SMT, THA remains relevant due to its robustness and ease of repair and testing, which are crucial in high-stress environments.

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Components of Through-Hole Assembly

The types of components used in THA are typically those that can tolerate high levels of heat and are physically larger, such as capacitors, transistors, and connectors. These components are chosen for THA due to their need for strong physical connections and ability to handle higher power and voltage levels. For instance, connectors that must endure frequent physical manipulation are better suited for through-hole mounting. Additionally, components like large capacitors and inductors, which are prone to mechanical stress due to their mass, benefit from the secure bond that THA provides.

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Tools Required for Through-Hole Assembly

Effective THA requires several tools: Soldering Iron: Used to melt the solder and join the component leads to the PCB. Solder and Flux: Solder provides the metal filler that bonds the component lead with the copper tracks of the PCB. Flux helps improve the flow and adhesion of solder, reducing the chance of cold solder joints. Desoldering Tools: Necessary for removing components or correcting mistakes. Tweezers and Insertion/Extraction Tools: For handling and positioning components. Inspection Equipment: Magnifying glasses or microscopes are essential for inspecting solder joints to ensure quality. These tools are fundamental to achieving a successful and reliable through-hole soldered joint.

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The Through-Hole Assembly Process

The THA process begins with the preparation of the PCB, which includes drilling holes at designated locations. Components are then inserted into these holes. The soldering process involves applying heat and solder to the joint, typically on the opposite side of the board where the component leads protrude. After soldering, the board should be cleaned to remove any residual flux, which can be corrosive. Finally, each joint is inspected visually or with the aid of a microscope to ensure it is free from defects such as cold joints or solder bridges.

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Advantages of Through-Hole Assembly

THA offers several advantages: Durability: The mechanical bond formed is strong, making it suitable for components that must endure physical stress. Power Handling: Through-hole components typically handle higher power levels and are better at dissipating heat. Ease of Replacement and Repair: Components can be easily replaced or reworked, which is advantageous during prototyping and testing. These attributes make THA particularly useful for applications requiring high reliability and durability.

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Disadvantages and Limitations

However, THA also has its limitations: Increased Cost and Time: The process of drilling holes and manually soldering components increases manufacturing time and cost. Design Restrictions: The need for holes can limit the available space on multilayer PCBs, potentially complicating the design process. Inefficiency for High Frequency: THA can be less suitable for high-frequency applications where the length of the leads can introduce unwanted inductance.

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Design Considerations

Designing a PCB for THA requires careful planning. Considerations include ensuring adequate spacing for drilling, thermal management, and component layout to withstand mechanical stress. Designers must also consider how THA components will coexist with SMT components if both are used on the same PCB.

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Quality Assurance and Testing

Quality in THA is ensured by adhering to standards such as IPC-A-610 for soldering and assembly. Testing methods include visual inspection for solder quality, as well as electrical tests to confirm the functionality of the assembly.

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Common Problems and Troubleshooting

Common issues in THA include cold solder joints (where the solder does not melt properly), solder bridges (unwanted connections between adjacent leads), and damaged PCBs from excessive heat. Troubleshooting these problems typically involves re-heating or reapplying solder, using desoldering tools to remove excess, and ensuring proper heat application during the initial soldering.

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Future of Through-Hole Assembly

While SMT has become predominant, the future of THA remains secure in specific applications requiring robust mechanical strength and high power handling. Innovations in THA may focus on improving efficiency and integrating with emerging technologies, ensuring its continued relevance in certain sectors of electronics manufacturing.
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Get in touch

Where Are We?

Factory Address

Industrial Park, No. 438, Shajing Donghuan Road, Bao'an District, Shenzhen, Guangdong, China

HK Office Address


Let's Talk

Phone : +86 400 878 3488

Send Us A Message

The more detailed you fill out, the faster we can move to the next step.

Microchip Removal