_____________________________________________________ ________
15
Mastering the Art of Soldering
4.2.2 Types of Leads of THT Components?
THT components’ leads come in the following types: axial, radial and multiple leads. These
types depend on the position of the leads in the electronic component.
Axial leads
are
positioned at each end of the cylindrical body or along the axis of symmetry of the
component and soldered horizontally on a PCB. Examples of components having axial leads
are the following:
Radial leads
are positioned in parallel from the same surface of a component and mounted
vertically or perpendicular to the PCB as seen from the following examples.
Electronic components with
multiple leads
are those with more than two leads and uses
single or dual in-line (DIP) packages to be mounted either directly onto the PCB or via a
socket or base. DIP is described as an electronic segment package with a rectangular
housing and two parallel lines of electrical pins. It is the most widely used package because
it can easily be mounted and is also available with 8, 12, 14, 16, and 20 pins.
DIP
Base