What is a through-hole in a PCB?

A through-hole is a type of connection point on a printed circuit board (PCB), which allows electrical signals to pass through the board and connect different components or circuits on the opposite side. Here is an explanation of the different types of through-holes found on PCBs.

1. Soldering Through-Hole (SOT)

Soldering Through-Hole (SOT) is a type of through-hole that allows electrical connection between two conductive pads on the same layer of the PCB. These pads are typically soldered together using surface mount technology (SMT). The through-hole allows the solder to flow between the two pads, forming a solid connection between them.

2. Through-Silkway (TS)

Through-Silkway (TS) is a type of through-hole that allows electrical connection between two different layers of the PCB. It typically involves drilling a hole through the board and then using a conductive material, such as copper,through hole PCB to fill the hole. This allows electrical signals to pass through the board and connect components or circuits on the opposite side.

3. Through-Hole Solder Joint (THS)

Through-Hole Solder Joint (THS) is a type of through-hole that allows electrical connection between a surface-mounted component and a through-hole on the PCB. This type of connection typically involves soldering a pin, wire, or other type of connector to a through-hole on the PCB, allowing it to connect to a surface-mounted component.

4. Through-Hole via (TVI)

Through-Hole via (TVI) is a type of through-hole that allows electrical connection between two or more conductive pads or vias on different layers of the PCB. It typically involves drilling a hole through the board and then using a conductive material, such as copper, to fill the hole. This allows electrical signals to pass through the board and connect components or circuits on different layers of the PCB.

The use of through-holes in PCBs has become increasingly important in modern electronics, as they allow for more complex designs and greater connectivity between components. However, they also introduce additional challenges, such as ensuring reliable solder connections and managing heat transfer during assembly processes. Therefore, it is essential to use high-quality PCB manufacturing processes and proper testing methods to ensure reliable and safe electronic systems.

related articles：

Why Use Plated Through Hole Technology in PCB Design?

What are examples of through-hole?

Do you know what types of holes on PCBs?

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