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A connector in a fixed location is a "jack", and a moveable connector is a "plug". [9] [11] The distinction is relative, so a portable radio is considered stationary compared to the cable from the headphones; the radio has a jack, and the headphone cable has a plug. Where the relationship is equal, such as when two flexible cables are connected ...
DC power connectors come in a wide variety of shapes and sizes, and there is unfortunately little standardization to their use. This is a large enough problem that some of the connectors that do have well-defined specifications are frequently used contrary to those specifications.
The polarity for 12 V DC sockets is center pin positive (+), outer collar negative (−). Reversed polarity will damage some electronic devices. Although the nominal voltage of a 12 V lead acid battery is 12 V DC, when the engine is running the car's battery charging system will bring the system voltage to 13.8 V DC or higher. [10]
A jack is a connector that installs on the surface of a bulkhead or enclosure, and mates with its reciprocal, the plug. [36] According to the American Society of Mechanical Engineers , [ 37 ] the stationary (more fixed) connector of a pair is classified as a jack (denoted J), usually attached to a piece of equipment as in a chassis-mount or ...
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This is a unique-looking barrel connector, apparently intended for providing a DC output jack (most DC jacks are used for power input). Possibly available in multiple voltage ranges, the one for voltage classification 2 (3.15 to 6.3 V) has an outside diameter of 4.75 mm and a protruding pin of 2.5 mm diameter. Previously known as EIAJ RCX-5321.
A "lock-tab DC coaxial connector" (also called "bayonet lock") offers a compromise that resists unplugging, but which will disengage when pulled hard enough. This connector uses small metal tab protrusions on the connector barrel to lock the plug in place, requiring a special push-and-rotate motion to engage the locks.
Barrel jack may refer to: . A type of heavy-duty jack (device), used for lifting vehicles or other heavy loads off the ground for maintenance and repair; A type of coaxial power connector, commonly used to provide low-voltage DC power to electronic devices