Through-Hole Technology (THT) PCB Assembly remains one of the most dependable and time-tested techniques in electronic manufacturing. While Surface Mount Technology (SMT) has gained popularity for its miniaturization capabilities, THT PCB Assembly continues to be the preferred solution for products that demand strength, longevity, and mechanical stability. At Shenzhen Fanway Technology Co., Ltd, we specialize in providing high-quality THT PCB Assembly services that meet the stringent demands of industrial, automotive, and power electronics applications.
THT PCB Assembly is the process of inserting electronic components with leads through pre-drilled holes on a printed circuit board (PCB) and soldering them to pads on the opposite side. This technique ensures a strong mechanical bond, which makes it suitable for high-reliability products exposed to mechanical stress or high temperatures.
Unlike SMT, which focuses on compactness, THT provides superior physical strength and resistance to vibration—making it indispensable for critical applications such as military devices, aerospace control systems, and heavy industrial equipment.
At Shenzhen Fanway Technology Co., Ltd, our engineers integrate advanced soldering techniques, such as wave soldering and selective soldering, to ensure consistent quality and durability in every THT PCB Assembly project.
The THT assembly process involves several key steps to ensure precision and performance:
Component Preparation: Components are checked, cleaned, and sorted according to the bill of materials (BOM).
Insertion: Each component is carefully inserted into its designated hole, either manually or through automated insertion equipment.
Soldering: We apply advanced wave soldering or selective soldering methods to create strong and clean connections.
Inspection and Testing: Every board undergoes AOI (Automated Optical Inspection), functional testing, and visual inspection to guarantee flawless performance.
These steps ensure that the final PCB not only meets industry standards but also exceeds client expectations in reliability and performance.
THT PCB Assembly offers several benefits that make it a preferred choice for high-performance and heavy-duty products:
Enhanced Mechanical Strength: The through-hole soldering method creates strong joints that can withstand stress and vibration.
Excellent Durability: Ideal for products operating under extreme temperature or physical conditions.
Ease of Prototyping and Testing: Components are easier to replace or adjust during product development.
High Load Capability: Supports larger components such as transformers, capacitors, and connectors that cannot be mounted via SMT.
Long-Term Reliability: Perfect for mission-critical systems that require stable electrical performance.
| Parameter | Specification |
|---|---|
| Assembly Type | Through-Hole (THT) |
| Soldering Process | Wave / Selective / Manual Soldering |
| Component Size Range | 0.5mm – 120mm |
| PCB Thickness | 0.6mm – 6.0mm |
| Board Layers Supported | 1–20 Layers |
| Inspection Method | AOI, X-Ray, Functional Testing |
| Lead-Free / RoHS Compliance | Yes |
| Production Capability | Up to 100,000 components per hour |
| Typical Application Fields | Automotive, Industrial, Aerospace, Power Systems, Communication Devices |
Each assembly is manufactured under strict ISO 9001:2015 and IPC-A-610 Class 2/3 quality standards, ensuring consistent excellence across all projects.
If your project demands robust physical stability, high power capacity, or reliable long-term performance, THT PCB Assembly is the better choice. It is ideal for:
Power electronics requiring strong current flow.
Mechanical devices exposed to vibration or physical impact.
Industrial controllers and automotive electronics where durability is essential.
High-heat environments where components need stable thermal endurance.
In contrast, SMT is best for compact consumer electronics. By combining both SMT and THT (known as mixed technology assembly), Shenzhen Fanway Technology Co., Ltd provides flexible manufacturing solutions tailored to customer requirements.
THT assembly ensures that each component is securely anchored to the PCB, which reduces the risk of connection failure under thermal expansion or vibration. The solder joints penetrate through the board, creating superior electrical continuity and mechanical integrity.
This translates to:
Longer product lifespan
Lower maintenance costs
Higher reliability in demanding conditions
Our team's experience in both manual and automated THT soldering guarantees consistent, repeatable quality that enhances your product's overall performance.
Q1: What is THT PCB Assembly, and how does it differ from SMT?
A1: THT PCB Assembly (Through-Hole Technology) involves inserting component leads through pre-drilled holes and soldering them for strong physical and electrical connections. In contrast, SMT mounts components directly on the surface. THT provides stronger joints, while SMT offers compact designs.
Q2: Why should I choose THT PCB Assembly for my project?
A2: Choose THT if your device needs to handle vibration, heat, or physical stress. It's perfect for automotive, industrial, and military-grade products where reliability is crucial.
Q3: Can THT PCB Assembly be combined with SMT in one board?
A3: Yes. This is called mixed technology assembly, and Shenzhen Fanway Technology Co., Ltd specializes in it. This approach allows you to take advantage of both THT's durability and SMT's compactness for optimal performance.
Q4: What testing methods are used to ensure quality in THT PCB Assembly?
A4: We use AOI (Automated Optical Inspection), functional testing, and X-ray inspection to detect defects like poor solder joints or misaligned components. These strict quality controls ensure consistent and reliable results.
With over 15 years of expertise in electronic manufacturing, Shenzhen Fanway Technology Co., Ltd provides end-to-end PCB assembly solutions — from prototype to mass production. Our THT assembly services are backed by:
Highly skilled technicians with decades of experience.
State-of-the-art soldering and inspection equipment.
Strict adherence to RoHS and IPC standards.
Customized solutions based on client-specific requirements.
We are committed to providing precision, reliability, and performance in every circuit board we assemble.
If your products demand strength, endurance, and reliability, THT PCB Assembly is undoubtedly the best option. It ensures lasting electrical and mechanical performance, especially in high-stress environments.
At Shenzhen Fanway Technology Co., Ltd, we combine advanced technology, professional expertise, and stringent quality control to deliver world-class THT PCB Assembly solutions.
Contact us today to discuss your project needs and discover how our customized PCB assembly services can elevate your product's performance and reliability.
