Recent Blog Posts

What do you need to know about a replacement Power Supply?

If you have a broken power supply or have just lost the power supply here is a guide to what information we would need to help you find a replacement.

First we would need to know what the power supply looks like. Generally it could be (select your type by clicking the picture - below):

A "plug-top" power supply:














A "Desktop" or "lump-in-line" power supply:



 A DIN Rail Power Supply:



A Chassis Mount power supply:

Chassis mount power supplies are sometimes also called enclosed power supplies. We may be able to get the exact same unit to replace your failed unit, if not then we will suggest something which is as close as possible.

We would need to know:

1. The voltage of the unit which has failed. This needs to be exactly the same and may even be multiple outputs.
2. The current (Amps or A) does not need to be exactly the same but must be higher than the unit it is replacing in order to supply the current demand of the load
3. The size of the new unit and any specific fixing points may need to be taken into account (these details are usually on the .pdf datasheet)

DIN Rail power supplies tend to be the lowest cost (per Watt) of all of the types of power supply. It is generally very easy to find a replacement if you have a unit failed. It might be that we can find you the exact like for like replacement or we can suggest a suitable replacement. The things we would need to know are:

1. Any size and shape requirements. Especially if fitting into a confined space
2. The voltage of the unit which you are replacing, this is very important because if you try and power your device with the wrong voltage then you could damage it. The voltage should be marked on the failed power supply, or if you have lost that then should be on the device you are powering.
3. The current or power is also important but does not need to be exactly matched. As long as the current (in Amps or A) is higher than the device requires then it will run fine and there is no risk of damaging it. i.e. if your failed unit was 2A then you could use a 3A unit
4. The position of the input and output terminals may be important if you have fixed wiring (to ensure cables reach)

Desktop power supplies are often also known as lump-in-line, especially if they have a fixed input and output lead. Most of our units have either a standard 3 pin IEC (kettle type) input lead or a 2 pin figure of 8 input. If you are looking for a replacement we would need to know:

1. The voltage of the unit which you are replacing, this is very important because if you try and power your device with the wrong voltage then you could damage it. The voltage should be marked on the failed power supply, or if you have lost that then should be on the device you are powering.
2. The current or power is also important but does not need to be exactly matched. As long as the current (in Amps or A) is higher than the device requires then it will run fine and there is no risk of damaging it. i.e. if your device requires 12Vdc 1.5A then a 12Vdc 2A power supply will be fine
3. The output jack size is also very important too. There are two common sizes which are 2.1mm and 2.5mm and this size refers to the internal diameter of the jack. It is very difficult to tell between the sizes and therefore we suggest you purchase an adapter for the jack which changes a 2.1mm to a 2.5mm jack which means you have both possibilities covered (2.1mm to 2.5mm)

Plug-Top type power supplies are often shipped with consumer electronics such as broadband routers, external hard-drives and cordless telephones. If you are looking for a replacement plug-top PSU then these are the things which we would need to know:

1. The voltage of the unit which you are replacing, this is very important because if you try and power your device with the wrong voltage then you could damage it. The voltage should be marked on the failed power supply, or if you have lost that then should be on the device you are powering.
2. The current or power is also important but does not need to be exactly matched. As long as the current (in Amps or A) is higher than the device requires then it will run fine and there is no risk of damaging it. i.e. if your device requires 12Vdc 1.5A then a 12Vdc 2A power supply will be fine
3. The output jack size is also very important too. There are two common sizes which are 2.1mm and 2.5mm and this size refers to the internal diameter of the jack. It is very difficult to tell between the sizes and therefore we suggest you purchase an adapter for the jack which changes a 2.1mm to a 2.5mm jack which means you have both possibilities covered (2.1mm to 2.5mm)

In rural locations it is often difficult to get a good connection to a traditional broadband provider, if it is possible at all. Our customer provides broadband connections to small rural communities in Ireland which would otherwise struggle to get any type of broadband connection.

The equipment involved uses either a -48Vdc connection or 24Vdc and because of the possibility of power outages the whole system is backed up by a 24Vdc battery system which is kept charged up by all the time.

The 24vdc equipment can be sensitive to voltage fluctuations, which you may get with a battery system which is discharging, the customer uses one of our DDH300B24 units (top right f the four units in the central cabinet). This DC DC Converter smooths the voltage such that as long as the input voltage is between 19 and 36Vdc then the output will remain stable at 24Vdc 12.5A.

The remainder of the equipment requires the telecoms standard -48Vdc and this is provided by three DDH300B48 units (the other three units in the central cabinet). The DDH range of DC DC Converters has a "floating" output which means that it can be grounded such that it gives a negative voltage. This again also means that as long as the input voltage stays within the range of 19 to 36Vdc then the load will see -48Vdc 6.25A.

If you have equipment which requires a stable DC Voltage, or you need a negative voltage from a battery pack then please let us know and we will be happy to guide you to the very best product for your application.

We often get asked "How do you reduce 24Vdc to 12Vdc" and the answer is pretty easy - you use a DC to DC converter which has a 24Vdc (nominal) input with a regulated 12Vdc output.

There are a number of advantages of this solution but one big advantage is that you can get a very stable 12Vdc output from a 24Vdc source which may even be wandering or diminishing. Most of the 24Vdc input DC DC Converters which we sell have an input range of 18-36Vdc and therefore as long as the voltage does not move outside of this range, you will be provided with a consistent and regulated 12Vdc Output

Here at Simply Power Supplies we have a wide range of 24Vdc to 12Vdc converters from 15W up to 360W and you can see our range here: 24Vdc to 12Vdc Converters

If you have a requirement for converting any DC voltage to any other DC voltage then please do get in touch!

We stock a range of 24Vdc and 12Vdc power supplies which are DIN rail mounting and have the same profile of a standard MCB.

These are perfect when you need some power, for LEDs or other automation kit, and want to hide the power supply inside a standard distribution board.

The range starts at 15W and goes up to 100W as follows:

The Meanwell DR-15-24 and DR-15-12 are the smallest of the range. They provide 15W of power which is 0.63A at 24Vdc and 1.25A at 12Vdc.







The Meanwell DR-30-24 and DR-30-12 is the next size up in the range. They provide 30W of power which is 1.5A at 24Vdc and 2A at 12Vdc.




The Meanwell DR-60-24 and DR-60-12 is the next size up in the range. They provide 60W of power which is 2.5A at 24Vdc and 4.5A at 12Vdc.





The largest units in the range are the Meanwell DR-100-24 and DR-100-12. They provide 100W of power which is 4.2A at 24Vdc and 7.5A at 12Vdc.



This range of power supplies is very popular with electricians, home automation installers and gate automation companies. They are reliable, discrete and low cost.

If you have a requirement for these please let us know and we would be happy to quote our very best price, which is backed by a large UK stock and our expert technical knowledge.

We now stock a full range of low cost 24Vdc DIN Rail Power Supplies from 50W to 500W. Each unit has screw terminals with a safety barrier strip at to the front and a voltage display which indicates the output voltage (which may be adjusted +/- 10%) and gives the user the reassurance that the unit is giving the correct voltage.

There is the option to either DIN Rail Mount the Power Supply, or screw mount it to a back plate. They are all convection cooled including the largest 500W unit, which greatly increases the reliability of the unit. They all accept a wide range input (switch selectable 90-132 & 180-264 on the 500W unit).

They all come with a full 1 year warranty.

You can find the units here:

24Vdc 50W - LP1050D-24SDA

24Vdc 100W - LP1100D-24M

24Vdc 300W - LP1300D-24M

24Vdc 500W - LPS1500D-24MDA

Meanwell or Mean Well has been producing high quality, low cost, power supplies for nearly 30 years. They produce a large range of Power Supply Units, adapters, Chargers, DC DC Converters and DC AC Power Inverters, all to the highest ISO9001 standards.Their main factory in Taiwan is highly regarded in the switching power supply market throughout the whole world producing well over 2000 different models across their range.

Simply Power Supply has access to the whole range of Meanwell power supplies and keeps wide range of their core units in stock for next-day shipment. This offers the convenience of on-line shopping for one of the best known brands of switching power supply in the world.

If you cannot find the specific unit you require, please ask and we should be able to source it for you.