Pinout
3.5mm audio jack (TRS) pinout
Pins
- Tip: left channel (or mono)
- Ring: right channel
- Sleeve: ground
Specifications
| Contacts | 2 (TS), 3 (TRS), 4 (TRRS) |
|---|---|
| Plug diameter | 3.5 mm |
| Stereo pinout | Tip left, ring right, sleeve ground |
| Headset pinout (TRRS) | CTIA: L, R, GND, mic; OMTP: L, R, mic, GND |
| Consumer line level | −10 dBV (≈ 0.32 V RMS) |
| Other sizes | 2.5 mm and 6.35 mm (1/4"), same T-R-S order |
| Typical use | Headphones, line out, headsets |
Notes
- A TS (mono) plug has only a tip and a sleeve; in a TRS jack its sleeve also touches the ring contact, so the right channel is shorted to ground instead of being wired to anything.
- A TRRS plug adds a second ring. On the CTIA layout (most phones, Apple) the order is Tip left, Ring right, Ring ground, Sleeve microphone; the older OMTP layout swaps the last two (Ring microphone, Sleeve ground). A headset on the wrong layout loses its microphone or hums.
- The 2.5 mm and 6.35 mm (1/4") plugs use the same tip, ring, sleeve order as the 3.5 mm one drawn here.
