Coaxial power connector
Encyclopedia
Power connector
Power connector may refer to:* AC power plugs and sockets* Industrial power plug* DC connector* Blade connector, commonly found in cars for quick connection of wiring to electrical components* IEC 60309 , so-called "Commando" plug and socket...
used for attaching extra-low voltage devices such as consumer electronics
Consumer electronics
Consumer electronics are electronic equipment intended for everyday use, most often in entertainment, communications and office productivity. Radio broadcasting in the early 20th century brought the first major consumer product, the broadcast receiver...
to external electricity
Electricity
Electricity is a general term encompassing a variety of phenomena resulting from the presence and flow of electric charge. These include many easily recognizable phenomena, such as lightning, static electricity, and the flow of electrical current in an electrical wire...
. Also known as barrel connectors, concentric barrel connectors or tip connectors, these small cylindrical connectors come in an enormous variety of sizes.
The primary use of these plugs is as a DC connector
DC connector
A DC connector is an electrical connector for supplying direct current power. Unlike domestic AC power plugs and sockets, DC connectors are not generally standardized....
(or sometimes AC) on the cable that comes from an external power supply
Power supply
A power supply is a device that supplies electrical energy to one or more electric loads. The term is most commonly applied to devices that convert one form of electrical energy to another, though it may also refer to devices that convert another form of energy to electrical energy...
. The matching jack or socket is then mounted in the equipment to be powered. Some of these jacks contain a normally closed switch; the switch can disconnect internal batteries whenever the external power supply is connected, to avoid the risk of battery leakage or explosion posed by incorrect recharging of the batteries.
Connector construction and terminology
Some power plugs are merely miniaturized phone plugsTRS connector
A TRS connector is a common family of connector typically used for analog signals including audio. It is cylindrical in shape, typically with three contacts, although sometimes with two or four . It is also called an audio jack, phone jack, phone plug, and jack plug...
(jack plugs in the UK) which have been pressed into service as power connectors. The two connectors on the left of the picture above are subminiature and miniature phone plugs respectively, the subminiature size being 3/32 inch and the miniature being 1/8 inch in diameter. The original application of these connectors was for audio microphones and headsets. Miniaturized phone plugs are typically 3/32 inch, 1/8 inch, 2.5 mm, or 3.5 mm in diameter, whereas the original full-sized telephone plug was 1/4 inch in diameter. Phone plug connectors were not originally designed to carry power, and there is a possibility of momentary or continuous short circuit
Short circuit
A short circuit in an electrical circuit that allows a current to travel along an unintended path, often where essentially no electrical impedance is encountered....
ing the power supply when mating the connector.
By contrast, coaxial power connectors were specifically designed to carry electrical power, and usually have features intended to make connections safer and more reliable. Typically, the outer body of the plug is one metallic contact, most often but not always connected to the negative side of the power supply. Coaxial power connectors generally have a cylindrical hollow insulated tip constructed to accept insertion of a pin (note that exceptions are described later). A pin mounted in the corresponding socket connects with this second contact, which is an internal metallic surface lining the inside of the tip of the plug.
The outer plug contact is usually called the barrel or sleeve, and the inner contact is called the tip (by analogy to the same terms used for phone plugs), although in the case of most coaxial power connectors the very end of the tip itself is a non-conductive ring.
Technically, most coaxial power plugs are considered to be of "female" gender, and most coaxial power jacks are considered to be "male". For a more detailed discussion of this naming convention, see the article on gender of connectors and fasteners
Gender of connectors and fasteners
In electrical and mechanical trades and manufacturing, each half of a pair of mating connectors or fasteners is conventionally assigned the designation male or female...
. As a notable exception, some special-purpose coaxial power connectors typically used for higher power levels are male gender, e.g. the larger size EIAJ plugs.
In a typical coaxial power configuration, the mating jacks or sockets have a somewhat oversized circular opening with a pin in the center. There is typically a single spring-loaded contact at the side of the opening, so some variation in mating plug barrel diameters can be accommodated. If the central pin of the jack is too large for the opening in the plug tip, it is not possible to make the connection. The pin should be designed to be just slightly smaller than the hole, to make a reliable connection. If the pin is substantially smaller, the connection may appear to work but may also be somewhat loose and unreliable.
Most coaxial power connectors are not sealed against entry of water or dust, but at least one manufacturer (Switchcraft) has announced a series of water-resistant coaxial power plugs and jacks.
Many different sizes
There are many different sizes of coaxial power connectors (see table at end of this article.)Contact ratings vary from unspecified (and probably less than 1 A in practice) up to 5 A, with 2 A typical. Voltage is again often unspecified, up to 48 V with 12 V typical. The smaller types usually have lower ratings, both for current and voltage.
It is quite possible that new sizes will continue to appear and disappear. The most likely reason for a new size is that a particular manufacturer wishes to discourage use of third-party power supplies, either for technical reasons or to promote use of their own products, or both.
Furthermore, sometimes there is no rhyme or reason to the choice of which connector is used in an application. For example, one manufacturer might use a particular size connector for its 12 V 1 A product; a second manufacturer might use a different connector for its 12 V 1 A product. Although the power supplies may be otherwise identical, they are not interchangeable because the connectors are different.
A more disastrous situation occurs when different manufacturers use the identical connectors for very different power supply voltages and currents. Use of the wrong power supply may cause severe equipment damage, or even fire.
Common sizes and interchangeability
The most common plugs are 5.5 mm in outside diameter (OD) and 9.5 mm in length. Two inside diameters (ID) are common in the plugs for this size, 2.1 mm and 2.5 mm, and ideally the pin in the jack should match. Generic plugs are often named after the inside diameter, so these types will be seen described as 2.1 mm DC plugs and 2.5 mm DC plugs respectively. These two sizes are easy to visually confuse, unless compared side by side. Slightly smaller 5.0 mm OD plugs are sometimes used in both 2.1 mm and 2.5 mm sizes, and are also frequently misidentified. Plug connector barrels for all of these sizes are typically 8 mm to 14 mm in length, with 9.5 mm most common.After the two common 5.5 mm OD plugs, the next most common size is 3.5 mm OD with a 1.3 mm ID, commonly 9.5 mm in length but both longer and shorter versions also exist. These 3.5 mm OD plugs are normally used for lower voltages and currents.
There are also 6.5 mm OD plugs with a 3 mm ID, 3.8 mm OD plugs with either a 1.35 mm or a 1.05 mm ID, 3.5 mm plugs with a 1.3 mm ID, and many less common sizes.
Use of a plug designed for a larger pin, for example a 2.5 mm plug with a 2.1 mm pin jack, may work adequately depending on the design of the jack, but often the result is an unreliable contact or occasionally no contact at all. A pin that is too large for the plug will not allow insertion of the plug at all. Similarly, a larger plug barrel (OD) may not fit at all; a smaller one may fit but may not make a reliable contact. Length is less critical than the diameters but is sometimes a consideration; in general a longer plug is no great problem but a shorter one may fail to contact the pin reliably or at all.
It is possible to obtain connector size adapters with a DC coaxial female connector on one end, and a different-sized DC coaxial male connector on the other end.
Locking and retention features
A ring-shaped locking detent or high-retention feature, present on the barrel of some DC coaxial connectors, is a feature intended to prevent accidental disconnection.Its presence or absence can cause confusion when distinguishing very similar sizes and variants. Some of the sizes listed appear to always include a high-retention feature, while others include it only in designs from certain manufacturers. Typically, this feature is a conical cut-back section of the tip, just behind the insulator that separates the inner from outer contact surfaces. In particular, the EIAJ (JEITA RC-5320A) standard connectors appear to specify a high-retention design.
The preceding very common feature must not be confused with the much-less-prevalent lock-ring DC coaxial connector which uses a captive threaded ring or collar to secure the connection between the plug and jack. Manufacturers known to offer this variant on at least some connectors include CUI, Kobiconn, Philmore, and Switchcraft. Note that this design requires that the lock-ring threading size be compatible with sufficiently protruding threads on a mating panel jack, and that some manufacturers (notably Switchcraft) have used a mix of metric and inch dimensioning. The lock-ring design, when fully engaged, offers strong resistance to unplugging; it is so secure that if the power cord is accidentally pulled forcefully, severe mechanical damage to equipment is likely.
An alternate design, the even rarer 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. This is a mechanical way to provide a "safe breakaway" feature somewhat like the magnetic latch used in the Apple Inc. proprietary MagSafe
MagSafe
MagSafe is a proprietary magnetically-attached power connector introduced by Apple Inc. on January 10, 2006 in conjunction with the MacBook Pro at the Macworld Expo in San Francisco...
design. Kobiconn and Lumberg have offered some lock-tab variants, and there may be other manufacturers as well.
To insure that locking connectors operate properly, it is important to specify and to test this feature. It is likely that mating connectors from a single manufacturer will interlock correctly, but even in this case, compatibility should be verified.
A completely different series of locking connectors is the snap and lock DC connector, which is not a coaxial power connector, and is covered in a separate article on DC connector
DC connector
A DC connector is an electrical connector for supplying direct current power. Unlike domestic AC power plugs and sockets, DC connectors are not generally standardized....
s. These multi-pin DC power connectors typically have 3 or 4 or more pins, and somewhat resemble mini-DIN connectors, except that the connector pins are thicker, to carry more current.
Standards
At least two different national standards have been established, by EIAJ
EIAJ connector
The EIAJ connector, more formally known as EIAJ RC-5320A, is a coaxial power connector or jack for small appliances. It is recognised by many consumers by the "yellow tip" at the end of the jack. It is also notable that the entire series of connectors has a built-in retention feature...
in Japan and DIN
Din
DIN or Din or din can have several meanings:* A din is a loud noise.* Dīn, an Arabic term meaning "religion" or "way of life".* Din is one of the ten aspects of the Ein Sof in Kabbalah ....
in Germany. In addition, several conventions have been adopted by specific manufacturers, notably by Sony
Sony
, commonly referred to as Sony, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan and the world's fifth largest media conglomerate measured by revenues....
, to indicate voltage by plug size.
Over time, there has been a trend to de facto standardize with negative DC voltage on the barrel (or sleeve) of a coaxial power connector. For example, Sony reversed its corporate standard during the 1990s, and adopted a barrel negative convention. One advantage of the barrel negative setup is its lower risk of short circuiting in automotive applications, since grounding the negative terminal of car batteries to the chassis has become an almost-universal standard. But barrel positive polarity is still occasionally seen, along with the continued usage of coaxial power connectors for low voltage AC power as well.
Some generic power supplies allow the polarity to be reversed by use of a switch, or by an unpolarized 2-pin plug and socket arrangement. There appear to be at least two not-quite-compatible standards in existence for these 2-pin connectors, and official specifications are hard to find.
One "standard" used by RadioShack
RadioShack
RadioShack Corporation is an American franchise of electronics retail stores in the United States, as well as parts of Europe, South America and Africa. As of 2008, RadioShack reported net sales and operating revenues of $4.81 billion. The headquarters of RadioShack is located in Downtown...
for its Adaptaplug brand features pins measuring 1.5 mm in diameter, 6 mm long, spaced 4 mm apart (center-to-center).
Another "standard" features asymmetrical pins measuring 1.3 mm and 1.9 mm in diameter, 5 mm long, spaced 4.4 mm apart (center-to-center).
There are probably other "standards" in use as well; it is not known how many different 2-pin connector systems of this type exist.
RadioShack, Kobiconn, and Philmore sell these types of 2-pin adapter connectors, and they also sell DC power cables with mating 2-pin female connectors.
EIAJ power connectors
Five plugPlug
Plug may refer to:* Plug for the plughole in the bathtub, washbasin and sink* Plug , a short lived British comic that ran from 1977 until 1979, when it merged with The Beezer, which featured a character from The Bash Street Kids called Plug as it's main star.* Plug , a family of fishing lures*...
and matching socket or jack
Jack (connector)
In electronics and electrical assemblies, the term jack commonly refers to a surface-mounted connector, often, but not always, with the female electrical contact or socket, and is the "more fixed" connector of a connector pair...
designs are defined by the EIAJ standard RC-5320A
EIAJ connector
The EIAJ connector, more formally known as EIAJ RC-5320A, is a coaxial power connector or jack for small appliances. It is recognised by many consumers by the "yellow tip" at the end of the jack. It is also notable that the entire series of connectors has a built-in retention feature...
(also called JEITA RC-5320A). Each of these plugs is used with a specified voltage
Voltage
Voltage, otherwise known as electrical potential difference or electric tension is the difference in electric potential between two points — or the difference in electric potential energy per unit charge between two points...
range. Most manufacturers use a yellow insulating material to distinguish these plugs from other similar-looking DC plugs.
- EIAJ-01 for 0–3.15 V
- EIAJ-02 for 3.15–6.3 V
- EIAJ-03 for 6.3–10.5 V
- EIAJ-04 for 10.5–13.5 V (also called JSBP 4)
- EIAJ-05 for 13.5–18 V (also called JSBP 5)
Unlike most DC plugs, the larger two EIAJ sizes have an internal male pin in the plug. The smaller three sizes do not, and are similar to the generic plugs in structure. The plug length is 9.5 mm in all cases, and current rating is 2 A.
There are two other, less common, connectors defined by EIAJ; RC-5321 and RC-5322. The latter is designed for both 12 V and 24 V automotive applications.
DIN 45323 power connectors
The German national standards organization DINDin
DIN or Din or din can have several meanings:* A din is a loud noise.* Dīn, an Arabic term meaning "religion" or "way of life".* Din is one of the ten aspects of the Ein Sof in Kabbalah ....
(Deutsches Institut für Normung — German Institute for Standardization) has issued DIN 45323, which apparently defines two DC power plug sizes. At least one of these sizes has a maximum rating of 34 V and 3 A. The information here is inferred from catalog references, as the German standard has not been translated into English as of yet.
- 5.00 mm OD, 2.00 mm ID, 14 mm long?
- 6.00 mm OD, 1.98 mm ID
Guidelines for power connector selection
With more than 40 different designs of coaxial power connectors in existence which are used to power electronic products, the lack of a clear starting point for selecting one has helped lead to the wide inconsistencies among various power plugs and devices. Here are some guidelines that can be drawn from the few power connector designs that have clear voltage specifications associated with them.- 1.5 V devices
- EIAJ-01
- 3.0 V devices
- EIAJ-01
- 4.5 V devices
- EIAJ-02
- EIAJ RC-5321
- 6.0 V devices
- EIAJ-02
- EIAJ RC-5321
- 7.5 V devices
- EIAJ-03
- 9.0 V devices
- EIAJ-03
- 10.5 V devices
- EIAJ-03
- 12.0 V devices, including automotive electrical systems
- EIAJ-04
- EIAJ RC-5322 for automotive use
- ARINC 628/EmPower for automotive or airplane use
- 13.5 V devices
- EIAJ-04
- EIAJ RC-5322 for automotive use
- ARINC 628/EmPower for automotive or airplane use
- 15.0 V devices
- EIAJ-05
- ARINC 628/EmPower for automotive or airplane use
- 16.5 V devices
- EIAJ-05
- 18.0 V devices
- EIAJ-05
Note that the special ARINC 628/EmPower
EmPower (aircraft power adapter)
EmPower is a 15 volt DC connector type found on many commercial airlines designed to provide power to travelers' electronic devices. The system is limited to 75 watts. The use of a special connector is to prevent laptops charging at altitude and ensure that only approved adapters can be used.Some...
connector (which strictly speaking is not a coaxial power connector) is used aboard commercial airlines to provide electrical power to passenger's electronic equipment.
Comprehensive listing of DC coaxial connectors
This list attempts to show all known sizes, and is annotated with some manufacturers producing selected types (based on those found in the Mouser, Digi-Key, Newark, Allied, EVG and other online catalogs), since each manufacturer makes its own unique subset of the known types. Note that the example part numbers given may have different connector barrel (sleeve) lengths, and are not necessarily exact equivalents. There are many more design variants than can be listed in this table, so only a small sampling of part numbers is given.By convention, connector size is often listed in the format A.AA x B.BB x C.CC, where A.AA is the Outside Diameter (OD), B.BB is the Inside Diameter (ID), and C.CC is the Length of the connector barrel, all measured in millimeters (mm). However, some manufacturers arbitrarily reverse the A and B dimensions, sometimes within the same page of their catalog. It appears that the most common barrel length is 9.50 mm, but shorter and longer connector barrels are in use.
A further distinction is made between the Inside Diameter (ID) and the Center Pin Diameter (CPD) for certain larger coaxial power plugs equipped with a male pin, which are often used for higher power applications such as portable computers. Some equipment manufacturers (e.g. Apple Computer, before it switched to its even more proprietary MagSafe
MagSafe
MagSafe is a proprietary magnetically-attached power connector introduced by Apple Inc. on January 10, 2006 in conjunction with the MacBook Pro at the Macworld Expo in San Francisco...
connector) use designs that are incompatible in subtle aspects. Connectors for these applications must be specified carefully to avoid severe equipment damage or even fire, due to the higher power carried by these designs.
An alternate connector size convention uses the format W.WW x X.XX x Y.YY x Z.ZZ, where the dimensions are arranged in an ascending size order. In this labeling scheme, W.WW is the Center Pin Diameter (CPD) of an optional male center pin, X.XX is the Inside Diameter (ID), Y.YY is the Outside Diameter (OD), and Z.ZZ is the Length of the connector barrel, all measured in millimeters (mm).
It is apparent that there are many partially overlapping standards in this product category. There are ad hoc minor variations in specs, and illogical inconsistencies in part numbers, even among the offerings of a single manufacturer. Confusion and irregularity are widespread, requiring a close reading of the specifications or testing of physical prototypes, or both, to insure connector compatibility. This table is provided primarily for convenience in comparing information from a wide range of possible sources, and may contain errors; it is recommended to double-check before relying upon the specs listed.
There are a number of sizes listed below that appear to be quite similar, and while the tolerances of these connectors are typically indicated as ±0.05 or ±0.03 mm by the manufacturers, there is still ambiguity as to whether two sizes differing by only 0.05 mm (or where the specification is only given to the nearest 0.10 mm) warrants listing them separately here. Also, there are minor tolerancing and measuring variations and discrepancies in the dimensions given; further work should be done to determine the original specifications for size, and then to list the similar sizes that are intended to be compatible.
| OD (mm) | ID (mm) | CPD (mm) | Barrel length (mm) | Adaptaplug | Standard | Volts | Plug part numbers | Jack part numbers | Notes |
|---|---|---|---|---|---|---|---|---|---|
| 2.35 | 0.70 | 9.5 | A | EIAJ-01 | 0–3.15 V | Kobiconn 3218-EX Lumberg 1636 01 |
Kobiconn 0307-EX (inline) | ||
| 2.40 | 0.70 | Egston 212 | possibly a rounded-off representation of EIAJ-01 | ||||||
| 2.40 | 0.80 | Egston 213 | |||||||
| 3.00 | 1.00 | ||||||||
| 3.00 | 1.10 | G | CUI Inc. PP-019 Egston 214 |
||||||
| 3.20 | 0.90 | CUI Inc. PP-017 | |||||||
| 3.40 | 1.30 | H | Kobiconn 3210-E | Kobiconn 0309-EX (inline) | |||||
| 3.40 | 1.35 | Egston 218 Medical, 220 | |||||||
| 3.40 | 1.40 | Lumberg NES/J 135 | |||||||
| 3.50 | 1.10 | CUI Inc. PP3–002C Philmore 202 |
|||||||
| 3.50 | 1.30 | Egston 238 Philmore 204,2049 |
Kobiconn 0308-EX (inline) Philmore 256 (inline) |
||||||
| 3.50 | 1.35 | CUI Inc. P7 CUI Inc. PP3–002D Egston 215 Kobiconn PA35135-E |
|||||||
| 3.60 | 1.15 | Egston 216 | |||||||
| 3.80 | 1.10 | I | CUI Inc. P9 but with 1.05 mm ID | ||||||
| 3.80 | 1.30 | Egston 217 | |||||||
| 3.80 | 1.35 | CUI Inc. P8 | |||||||
| 4.00 | 1.70 | 9.5 | B | EIAJ-02 | 3.15–6.3 V | Kobiconn 3219-EX Lumberg 1636 02 |
Kobiconn 0311-EX (inline) | ||
| 4.75 | 1.70 | 9.5 | C | EIAJ-03 | 6.3–10.5 V | Kobiconn 3220-EX Lumberg 1636 03 |
Kobiconn 0310-EX (inline) | ||
| 4.75 | ?.?? | 2.5 protruding | C | EIAJ RC-5321 | |||||
| 5.00 | 1.50 | J | |||||||
| 5.00 | 2.00 | DIN 45323? | Egston 206,207,219 | ||||||
| 5.00 | 2.10 | K | CUI Inc. P3 | ||||||
| 5.00 | 2.50 | L | CUI Inc. P4 | ||||||
| 5.50 | 1.50 | S | |||||||
| 5.50 | 2.10 | M | CUI Inc. P5 CUI Inc. PP3–002A Kobiconn 3217-EX Philmore 210, 210L, 2109 Switchcraft S-760, S-765 |
CUI Inc. PR-002A (inline) Kobiconn 0302 (inline) Philmore 257 (inline) Switchcraft 722A (panel) |
2.1 mm center pin | ||||
| 5.50 | 2.10 | CUI Inc. P10 Kobiconn 7391 Philmore 2560 Switchcraft S760K |
2.1 mm center pin, lock-ring | ||||||
| 5.50 | 2.10 | Kobiconn 0721-EX | Kobiconn 1000-EX (panel) | 2.1 mm center pin, lock-tab | |||||
| 5.50 | 2.50 | N | CUI Inc. P6 CUI Inc. PP3–002B Egston 222 Kobiconn 0702-EX Philmore 250, 250L, 2509 Switchcraft 760, 765 |
CUI Inc. PR-002B (inline) Kobiconn 0303 (inline) Philmore 258 (inline) Switchcraft 712A (panel) |
2.5 mm center pin | ||||
| 5.50 | 2.50 | CUI Inc. P11 Kobiconn 7395 Philmore 2560 Switchcraft 760K |
2.5 mm center pin, lock-ring | ||||||
| 5.50 | 2.50 | Kobiconn 0725-EX | Kobiconn 1100-EX (panel) | 2.5 mm center pin, lock-tab | |||||
| 5.50 | 2.80 | O | |||||||
| 5.50 | 3.30 | 1.00 | 9.5 | D | EIAJ-04, JSBP4 | 10.5–13.5 V | Lumberg 1636 04 | Microsoft Xbox 360 HD DVD drive | |
| 5.50 | 3.80 | 1.80 | P | ||||||
| 6.00 | 1.98 | DIN 45323 | Lumberg 1632 01 | ||||||
| 6.30 | 3.00 | Q | |||||||
| 6.50 | ?.?? | EIAJ RC-5322 | |||||||
| 6.50 | 3.00 | ||||||||
| 6.50 | 3.10 | 1.00 | Philmore 285 | ||||||
| 6.50 | 3.40 | 1.40 | 9.0 | 18 VDC @5A | Kobiconn 6014-E | used often for laptop computers | |||
| 6.50 | 4.10/3.10 | 1.00 | U | same as Philmore 285? | |||||
| 6.50 | 4.30 | 1.40 | T | EIAJ-05, JSBP5 | 13.5–18.0 V | Lumberg 1636 05 | OD is of ring at tip | ||
| 6.90 | 4.20 | 0.70 | R | ||||||
| 7.00 | ?? | 1.00 | Philmore 48-412 |
RadioShack Adaptaplug conversion matrix
Adapter plugs that convert from the earlier-described two-pin non-polarized connector to various DC power plugs are widely sold by RadioShackRadioShack
RadioShack Corporation is an American franchise of electronics retail stores in the United States, as well as parts of Europe, South America and Africa. As of 2008, RadioShack reported net sales and operating revenues of $4.81 billion. The headquarters of RadioShack is located in Downtown...
. They have assigned a single-letter code to each "Adaptaplug", but have not provided any other official designation, nor their complete specifications and tolerances on barrel and pin dimensions. Note that the diameters listed on the RadioShack website are only specified to the nearest 0.1 mm, and sometimes differ slightly from the official EIAJ RC-5320A
EIAJ connector
The EIAJ connector, more formally known as EIAJ RC-5320A, is a coaxial power connector or jack for small appliances. It is recognised by many consumers by the "yellow tip" at the end of the jack. It is also notable that the entire series of connectors has a built-in retention feature...
standards, when applicable. This list may include some discontinued parts, which are nevertheless retained for completeness.
| Adaptaplug | Outside diameter |
Inside diameter |
Pin diameter |
EIAJ type |
EIAJ range |
Ring color |
Radio Shack part number |
|---|---|---|---|---|---|---|---|
| A | 2.3 mm | 0.7 mm | EIAJ-01 | up to 3.15 V | Yellow | 3807936 | |
| B | 4.0 mm | 1.7 mm | EIAJ-02 | 3.15 V to 6.3 V | Yellow | 3780266 | |
| C | 4.7 mm | 1.7 mm | EIAJ-03 | 6.3 V to 10.5 V | Yellow | 3780267 | |
| D | 5.5 mm | 3.3 mm | 0.9 mm | EIAJ-04 | 10.5 V to 13.5 V | Yellow | 3780268 |
| E | 2.5 mm (3/32" submini plug) | Black | 3870005 | ||||
| F | 3.5 mm (1/8" mini plug) | Black | 3875411 | ||||
| G | 3.0 mm | 1.1 mm | Turquoise | 3807935 | |||
| H | 3.4 mm | 1.3 mm | Orange | 3870006 | |||
| I | 3.8 mm | 1.1 mm | Pink | 3870007 | |||
| J | 5.0 mm | 1.5 mm | Red | 3870004 | |||
| K | 5.0 mm | 2.1 mm | Purple | 3807937 | |||
| L | 5.0 mm | 2.5 mm | Dark Green | 3807938 | |||
| M | 5.5 mm | 2.1 mm | Navy | 3807939 | |||
| N | 5.5 mm | 2.5 mm | White | 3807940 | |||
| O | 5.5 mm | 2.8 mm | Brown | 3780269 | |||
| P | 5.5 mm | 3.8 mm | 1.8 mm | Not Specified | 3802153 | ||
| Q | 6.3 mm | 3.0 mm | Yellow-Green | 3780270 | |||
| R | 6.9 mm | 4.2 mm | 0.7 mm | Not Specified | 3912655 | ||
| S | 5.5 mm | 1.5 mm | Gray | 3875405 | |||
| T | 6.5 mm | 4.3 mm | 1.4 mm | EIAJ-05 | 13.5 V to 18.0 V | Yellow | 3875406 |
| U | 6.5 mm | 4.1 mm / 3.10 mm | 1.0 mm | Light Yellow | 3875407 |
See also
- AC adapterAC adapterThe AC adapter, AC/DC adapter or AC/DC converter is a type of external power supply, often enclosed in what looks like an over-sized AC plug. Other names include plug pack, plug-in adapter, adapter block, domestic mains adapter, line power adapter, or power adapter...
- EIAJ connectorEIAJ connectorThe EIAJ connector, more formally known as EIAJ RC-5320A, is a coaxial power connector or jack for small appliances. It is recognised by many consumers by the "yellow tip" at the end of the jack. It is also notable that the entire series of connectors has a built-in retention feature...
- Cigarette lighter receptacle
- DC connectorDC connectorA DC connector is an electrical connector for supplying direct current power. Unlike domestic AC power plugs and sockets, DC connectors are not generally standardized....
External links
- Allied Electronics
- Digi-Key Corporation
- Mouser Electronics
- Newark Electronics
- EVG Martens GmbH & Co. KG
- CUI, Inc.
- Egston Electronics
- Kobiconn, Inc. Mouser Electronics appears to be the primary distributor
- Lumberg Connect GmbH
- Philmore Manufacturing Co. Inc. In spite of the name, may only distribute components
- RadioShack Adaptaplug System
- Switchcraft, Inc.
- Low voltage connection basics Simple graphical tutorial for consumers
- Sutars 12.0mm coaxial power connector, used on some older European motorcycles
- PowerStream Inline adapters to convert from 5.5 x 2.1 mm plugs
- NSSN Search engine for standards