| Through hole technology (THT) |
Surface mount design or technology
(SMD or SMT) |
Embedded components |
| A plating hole is required to pass the component terminal through the hole. |
Can be directly installed onto surface solder pads |
It can be placed like SMD or underneath the surface of PCB. |
| According to the terminals that can be placed in the PCB, such as axial and radial leads |
Can be placed like a flat surface |
The components placed on the PCB are called discrete components. |
| A through-hole component is a durable and sturdy mechanical connection. |
high reliability |
high reliability |
| Due to the terminals being soldered on opposite sides of the PCB, double-sided assembly is not possible. |
It can be assembled on both sides. |
Furthermore, components can be placed in the middle of the PCB. |
| The land area is larger. |
Smaller footprint |
Smaller footprint |
| Component replacement is easier. |
Component replacement can be performed. |
It is difficult to replace parts after assembly. |
