page_title: Phone connector (audio)
section_title: Video
hierarchical_section_title: Phone connector (audio) / Video
context_page_description: A phone connector, also known as phone jack, audio jack, headphone jack or jack plug, is a family of electrical connectors typically used for analog audio signals. The standard is that a plug will connect with a jack.
  The phone connector was invented for use in telephone switchboards in the 19th century and is still widely used.
  The phone connector is cylindrical in shape, with a grooved tip to retain it. In its original audio configuration, it typically has two, three, four and, occasionally, five contacts. Three-contact versions are known as TRS connectors, where T stands for "tip", R stands for "ring" and S stands for "sleeve". Ring contacts are typically the same diameter as the sleeve, the long shank. Similarly, two-, four- and five- contact versions are called TS, TRRS and TRRRS connectors respectively. The outside diameter of the "sleeve" conductor is 6.35 millimetres. The "mini" connector has a diameter of 3.5 mm and the "sub-mini" connector has a diameter of 2.5 mm.
context_section_description: Equipment requiring video with stereo audio input/output sometimes uses 3.5 mm TRRS connectors. Two incompatible variants exist, of 15 millimetres (0.59 in) and 17 mm (0.67 in) length, and using the wrong variant may either simply not work, or could cause physical damage.
  Attempting to fully insert the longer (17 mm) plug into a receptacle designed for the shorter (15 mm) plug may damage the receptacle, and may damage any electronics located immediately behind the receptacle. However, partially inserting the plug will work as the tip/ring/ring distances are the same for both variants.
  Using the shorter plug in a socket designed for the longer connector will result in the plug not 'locking in', and may additionally result in wrong signal routing and/or a short circuit inside the equipment (e.g. the plug tip may cause the contacts inside the receptacle – tip/ring 1, etc. - to short together).
  The shorter 15 mm TRRS variant is more common and fully physically compatible with 'standard' 3.5 mm TRS and TS connectors.
caption: Different length 3.5 mm TRRS connectors
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