3.5 mm TRS (1/8″ Stereo) Headphone Jack
The universal consumer headphone jack. Tip = Left, Ring = Right, Sleeve = common ground.
Pinout
Pinout data not yet populated for this connector.
Specifications
| Diameter | 3.5mm |
|---|---|
| Pole count | 3-pole TRS |
| Signal topology | single-ended-stereo |
| Intended use | Consumer headphone, line-level analog audio, AUX |
About this connector
The 3.5 mm tip-ring-sleeve (TRS) phone connector has been the consumer headphone standard since the late 1960s, when miniaturization of the 6.35 mm 1/4″ phone jack reached compatibility with portable cassette players. Tip carries the Left channel, ring carries the Right channel, sleeve is the shared single-ended ground.
The connector lost market share on smartphones from 2017 onward (Apple removed it from the iPhone 7; most flagship Android followed), but remains ubiquitous on laptops, DAPs, dongle DACs, and every desktop audio device on the planet. Lossless, single-ended only — no balanced differential capability.
Cross-format adapters in the catalog: to 6.35 mm, from USB-C, from Lightning, to dual RCA.
Compatible parts (MPNs)
| MPN | Form | Termination | Plating | Price (USD) | |
|---|---|---|---|---|---|
| SMT-35-A | Cable plug, straight | Solder | Nickel | $3 | |
| NYS231-G | Cable plug, audiophile | Solder | 24K gold over nickel | $9 |