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J is For Jack

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Wednesday March 27, 2013 at 10:46am
The output jack on an adaptor or desktop power supply is the part which is hardest to define for a citomer over the phone.

It is very easy to work out the voltage and current you would need to replace a failed power adaptor, however when it comes to the size and type of output jack there is almost always some confusion.

With this in mid what do you need to know? Firstly it would be useful to know the polarity of the jack, most are Centre Positive (C+ve) which means that the inside of the jack carries the positive and therefore the outside carries the negative.

The next problem is the size, the two most common sizes of jack which are used are 2.1mm and 2.5mm and this size relates to the size of the hole in the middle of the barrel of the jack. With there being so little difference between these sizes it is very difficult to measure without a specialist device. One way is to take a 2.5mm drill bit; if the bit will fit down the hole in the jack then it must be a 2.5mm jack and if not then it is almost certainly a 2.1mm jack.

We carry a range of power supplies with both of these common types of output jack as well as other sizes such as 5.5mm.

View our full range here: Adaptors

As with all our products - if you can't find what you are looking for then either call us or fill in the form on the right and we will get in touc hwith you.
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