The earphone jack is a common type of electronic component among socket elements. Currently, the main specifications for earphone jacks include 2.5mm and 3.5mm, and both types are widely used. Additionally, these earphone jacks are extensively applied in various electronic devices such as smartphones, digital audio equipment, and more.

The main components of the earphone jack

Contacting Parts

The contact piece is the conductive part of an earphone jack, which can transmit voltage or signals to the corresponding contact piece of its matching connector through the PCB board or wire connected to it. There are many different types of contact and terminal structures for earphone jack contact pieces currently available.

Exterior shell

The shell of the earphone socket primarily serves to house the contact pieces and also securely fasten the connector to the device.

Insulating Components

The role of the insulating component in the earphone jack is to maintain the correct alignment of the contact pieces, and its purpose also includes insulating the contact pieces from each other as well as from the housing.