PCBA engineers should know Surface-mount technology (SMT)

The Surface-mount technology (SMT) introduce

Simply say Surface-mount technology is a PCB assembly technology.
SMT is a method for producing electronic circuit assembly.
The components are mounted or placed directly onto the surface of the PCB.
Most of the time this mounted procedures are in PCBA plants.

SMD is related to SMT

SMD is short for surface-mount device.
The electronic device made through SMT called Surface-mount device.
Most of time we can use SMT instead of SMD.
That’s the reason why most normal people don’t know SMD definition.

SMT replaced Through-hole technology

In the industry, the SMT has largely replaced the through-hole technology.
Through-hole technology is a construction method of fitting components with wire leads into holes in the circuit board.
The application of through-hole technology are not suitable for surface mounting.
This means that large transformers or heat-sinked power semiconductors can not use through-hole technology.
By the way, the SMT and through-hole technology used on the same d board.