Through-Hole PCB Assembly

Through-Hole PCB Assembly is a traditional electronic component assembly method. It is mainly used to mount components with long pins on PCB. Its core feature is that the pins of the components pass through the pre-drilled holes on the PCB and are fixed on the other side of the board by welding.

Pcb prototype service introduction

Component assembly

It’s crucial to work with a reliable PCB prototype manufacturer. We can fabricate the sample boards quickly. If you need some printed circuit boards, contact us now. UETPCB offers quick-turn PCB prototype services for PCB manufacturing and assembly at high quality and low cost.

China PCB Assembly Manufacturer – UET PCB

UETPCB is a professional pcb supplier & pcba manufacturer in Shenzhen. We focus on providing high-quality PCB assembly services. As a reliable PCB supplier, we provide one-stop service from PCB manufacturing to assembly. Our professional team has the experience and skills to meet the needs of various industries. Our goal is to be your preferred partner in China PCBA manufactory. If you need quality PCB assembly services, please contact us.

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Through-Hole Vs SMT

Feature	Through-Hole	SMT (Surface Mount Technology)
Component Type	Long-leaded, larger components (e.g., electrolytic capacitors, transformers)	Compact, leadless components (e.g., SMD resistors, ICs)
PCB Design	Requires drilled holes (common for single/double-layer boards)	No drilling needed (ideal for high-density multilayer boards)
Mechanical Strength	High (suitable for physical stress or high-temperature environments)	Lower (relies on solder paste adhesion)
Cost/Efficiency	Higher labor costs (ideal for prototypes/low-volume)	Highly automated (optimized for mass production)

Steps for Through-Hole PCB Assembly

Drilling
Hole matching the pins of components is pre-drilled on the PCB, usually with a larger diameter (such as more than 1mm).
Component Insertion
The pins of the components pass through the holes, usually done manually or by an automatic insertion machine.
Soldering
The pins are fixed to the PCB pads by wave soldering or manual soldering to form an electrical connection.

Our Through-hole Assembly Capabilities

Manual and automated Insertion
Lead-free or RoHS soldering
Double Wave Flow Solder
Selective wave soldering
Use low and high melting point solder
Conformal Coating
IC Programming
Inspection and functional testing

China PCB Assembly Manufacturer

UETPCB is a professional pcb supplier & pcba manufacturer in Shenzhen. We focus on providing high-quality PCB assembly services. As a reliable PCB supplier, we provide one-stop service from PCB manufacturing to assembly. Our professional team has the experience and skills to meet the needs of various industries. Our goal is to be your preferred partner in China PCBA manufactory. If you need quality PCB assembly services, please contact us.

Start A Quote Now

PCB Fabrication Process

Step 1：Creating a designed layout on the copper-clad laminate

Step 2：PCB manufacturers will etch or remove excess material from inner layers to reveal images and pads.

Step 3：Laminating printed circuit board materials at high temperatures for creating the PCB layer stack up

Step 4：Creating mounting holes, through-hole pins, and vias on PCB

Step 5：Etching and removing the excess copper of the surface layer to reveal images and pads

Step 6：Placing plating pin holes and via holes

Step 7：Creating a protective coating or solder masking on the surface

Step 7：Silkscreen printing, logos or other markings, and installing polarity indicators on the surface

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PCB Production Equipment

UETPCB uses advanced production machinery to ensure precise, efficient. These amazing machines create flawless boards, and save time. Here are our some equipment.