Through-Hole Technology (THT)

maker

A method of mounting electronic components using leads inserted through holes on a printed circuit board (PCB).

expanded

Through-Hole Technology (THT) involves inserting component leads into drilled holes on PCBs and soldering them to pads located on the opposite side. This method provides a robust mechanical bond, making it suitable for components that will pass high stress situations, like transformers and large capacitors. THT is particularly advantageous in prototyping and in situations where reliability is paramount, such as in aerospace and military applications.

examples

Usage of THT in mounting a power resistor with a 5-Watt rating, having leads to be inserted in a standard 3.2 mm (0.125-inch) PCB hole.

Typically employed in power supply designs requiring robust connections to handle significant current without risking mechanical displacement.

Application in the assembly of a transformer using THT with leads designed for 1 mm (0.039-inch) diameter PCB holes.

Commonly implemented in traditional analog circuits and power management systems due to its durability under severe conditions.

related terms

Header pins

Header pins are electrical connectors used for creating solderless or soldered connections between circuit boards and other components.

Printed Circuit Board (PCB)

A structure used to mechanically support and electrically connect electronic components using conductive pathways etched from copper sheets laminated onto a non-conductive substrate.

Prototyping board

A prototyping board is a platform used to assemble electronic circuits without soldering.

Surface Mount Device (SMD)

A type of electronic component that is mounted directly onto the surface of a printed circuit board (PCB).

Solder

Solder is an alloy used to join metal components, typically in electronic circuit assembly.