6.35 mm TRS (1/4″ Phone Jack)
The original phone jack — invented 1878. Mechanically robust and dominant in desktop and pro-audio environments.
Pinout
Pinout data not yet populated for this connector.
Specifications
| Diameter | 6.35mm |
|---|---|
| Pole count | 3-pole TRS |
| Signal topology | single-ended-stereo |
| Intended use | Desktop headphone amplifier output, pro-audio line-level |
About this connector
Invented in 1878 for telephone-switchboard patching, the 1/4-inch (6.35 mm) phone jack predates every other audio connector in the database by roughly a century. The TRS variant carries stereo single-ended audio (Tip = Left, Ring = Right, Sleeve = ground) and is mechanically the most robust jack in common use — a 6.35 mm-shank plug survives drops, crush, and decades of insertion cycles.
The de-facto standard for desktop headphone amplifiers and pro-audio guitar/instrument cables. Almost every desktop headphone amplifier provides 6.35 mm SE alongside any balanced outputs.
Cross-format: 3.5 → 6.35 mm adapter is the most-shipped audio adapter on earth. For the related TRRS / TS variants see the IEC 60603-11 reference document.
Compatible parts (MPNs)
| MPN | Form | Termination | Plating | Price (USD) | |
|---|---|---|---|---|---|
| NYS228-BG | Cable plug, straight | Solder | Gold-plated contacts | $7 |