Posted on March 5, 2016 by KVMGalore | 0 comments
TRS connector is a three-contact version of an audio connector (or phone connector), where T stands for "tip", R stands for "ring", and S stands for "sleeve".
A TRS connector is cylindrical in shape, and is typically used in audio applications with MP3 music players, iPods and smartphones to carry stereo sound.
This type connector was invented for use in telephone switchboards in the 19th century, AKA phone connector. In its original configuration, the outside diameter of the "sleeve" conductor was ¼ inch. The 3.5 mm (approx. ⅛ inch) version is also known as the miniature (or mini) version of a TRS phone connector.
The most immediately recognizable 3.5 mm (⅛") TRS connector is the version often seen as the plug on the end of a pair of headphones.
The 3.5 mm TRS audio connector, which is the most commonly used in portable application today, has been around at least since the Sony EFM-117J radio which was released in 1964. It became very popular with its application on the Walkman in 1979.