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AC/DC Adapters

An AC/DC adapter, or plug-in power supply, is an electrical device that takes input power from a mains power supply and converts or derives the right current, frequency and voltage to power the component it is attached to. Main power supplies provide power to devices that run on batteries or have no other power source. These are suitable for applications such as chargers, set-top boxes, motor control and other office automation products. A plug-in power supply resides outside the main unit, unlike a computer power supply which is internal. You can learn more in our complete guide to AC/DC adapters.

For popular Raspberry Pi power supplies, visit our sister site OKdo.com and all thing Raspberry Pi and SBC.

How does an AC/DC adapter work?

An AC/DC adapter is made up of a central unit which draws power from an AC outlet, it then converts the power to DC that is used to charge the device. Each AC adapter has a specific power rating, measured in volts or watts that it can handle and the output of a device. Because of the power rating and the type of plug on the end, an AC adapter is not universal and can only be used with devices with the same requirements and connector.

International Plug Power Supplies

Some plug-in power supplies come with interchangeable input connectors that you can swap when traveling to areas with different plug types such as the United Kingdom, USA, Europe, Japan and Australia. They may also come with protection features such as short circuit, over voltage and overload to suit the international safety approvals making them ideal for the global marketplace.

Are all AC/DC Adapters the same?

It is possible to use a power adapter on different devices, but it's important to check whether it's AC or DC output. Using close to, if not exactly the correct voltage and Amperage. If you're unsure it might be worth investing in a universal power adapter with lots of different plug fittings.

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In Stock RS PRO 2.1 x 5.5 x 12 mm Centre Positive AC/DC Adapter AC/DC Adapter Type G 12 W 12V dc Output, 1 A RS Stock No. 175-3303 Subtotal (1 unit) €10.62(exc. VAT) €10.62/unit Quantity	-	-	AC/DC Adapter	AC/DC Adapter	12V dc	Type G	-	-	-	-	2.1 x 5.5 x 12 mm Centre Positive	12W	1.5m	-	-	-	1	-	1A	UK Plug	70mm	0°C	Regulated	40°C	73.2mm	-	-	-	EN 60950-1, CE	49.5mm	-	-	79.3%	-	240V ac	-
In Stock RS PRO 2.1 x 5.5 mm Centre Positive AC-DC Converter Power Supplies AC/DC Adapter EU 30 W 12V dc Output, 2.5 A RS Stock No. 200-8942 Subtotal (1 unit) €17.83(exc. VAT) €17.83/unit Quantity	-	-	AC/DC Adapter	AC-DC Converter Power Supplies	12V dc	EU	-	-	-	-	2.1 x 5.5 mm Centre Positive	30W	-	-	-	-	1	-	2.5A	-	94mm	0°C	Regulated	45°C	-	-	-	-	CCC, CE, cULus, FCC, TUV, UL	6mm	-	-	85%	-	240V ac	-
In Stock RS PRO AC/DC Adapter C14 65 W 30V dc Output, 2.17 A RS Stock No. 229-7869 Subtotal (1 unit) €36.07(exc. VAT) €36.07/unit Quantity	-	-	AC/DC Adapter	-	30V dc	C14	-	-	-	-	-	65W	1.5m	-	-	-	1	-	2.17A	-	119mm	0°C	-	40°C	60mm	-	-	-	CCC, FCC, TUV, UL, CE, cULus	60mm	-	-	89%	-	240V	-
Limited stock RS PRO 2.1 mm DC Power Connector Power Supply AC/DC Adapter UK 24 W 24V dc Output RS Stock No. 304-007 Subtotal (1 unit) €17.57(exc. VAT) €17.57/unit Quantity	-	-	AC/DC Adapter	Power Supply	24V dc	UK	-	-	-	-	2.1 mm DC Power Connector	24W	1.5m	-	-	-	1	-	-	UK Plug	71.2mm	0°C	-	40°C	29mm	-	-	-	UKCA, CE	43.2mm	-	-	86%	-	264V ac	-
Limited stock RS PRO 2 Output 4-Way Connector, 6 x 1.5 mm, 8 Tip Connector, 2.1 x 5.5 mm Connector, 2.5 x 5.5 x 9.5mm, 2.5 x 5.5 x RS Stock No. 907-6249 Subtotal (1 unit) €35.43(exc. VAT) €35.43/unit Quantity	-	-	AC/AC Adapter	AC-DC Converter Power Supplies	24V ac	EU, UK, 2-Pin (EU), US, AUS	-	-	-	-	4-Way Connector, 6 x 1.5 mm, 8 Tip Connector, 2.1 x 5.5 mm Connector, 2.5 x 5.5 x 9.5mm, 2.5 x 5.5 x 12mm, 6.3 x 3 mm, 5 x 1 mm, 3.5 x 1.35 mm, 2.1 x 5.5 x 10 mm, 2.1 x 5.5 x 10.5 mm Centre Positive Fema	18VA	1800mm	-	-	-	2	-	750mA	-	106mm	-	-	-	55.5mm	-	-	-	CE	48.5mm	-	-	79%	-	240V ac	-
In Stock RS PRO AC-DC Converter Power Supplies AC/DC Adapter UK 30 W 12V dc Output, 2.5 A RS Stock No. 200-8939 Subtotal (1 unit) €19.47(exc. VAT) €19.47/unit Quantity	-	-	AC/DC Adapter	AC-DC Converter Power Supplies	12V dc	UK	-	-	-	-	-	30W	-	-	-	-	1	-	2.5A	-	94mm	0°C	Regulated	45°C	-	-	-	-	CCC, CE, cULus, FCC, TUV, UL	6mm	-	-	85%	-	240V ac	-
In Stock RS PRO 2.1 x 5.5 x 11 mm DC Plug Power Supply AC/DC Adapter Interchangeable 18 W 18V dc Output, 1 A RS Stock No. 625-746 Subtotal (1 unit) €32.17(exc. VAT) €32.17/unit Quantity	-	-	AC/DC Adapter	Power Supply	18V dc	Interchangeable	-	-	-	-	2.1 x 5.5 x 11 mm DC Plug	18W	1.5m	-	-	-	1	-	1A	Interchangeable	65.5mm	0°C	Regulated	40°C	36.2mm	-	-	-	CCC, CE, FCC, RCM, RoHS, TUV-GS, UKCA, cULus	43.5mm	-	-	0.85%	-	264V	-
In Stock RS PRO 2.1 x 5.5 mm DC Plug Power Supply AC/DC Adapter UK 12 W 12V dc Output, 0.2 A RS Stock No. 625-747 Subtotal (1 unit) €12.56(exc. VAT) €12.56/unit Quantity	-	-	AC/DC Adapter	Power Supply	12V dc	UK	-	-	-	-	2.1 x 5.5 mm DC Plug	12W	1.5m	-	-	-	1	-	0.2A	UK	62mm	-20°C	Regulated	70°C	38mm	-	-	-	CCC, CE, FCC, RCM, RoHS, TUV-GS, UKCA, cULus	48mm	-	-	80%	-	264V	-
Limited stock RS PRO 4 Output Multi-Choice Switched Mode Power Supply AC/DC Adapter US, Australia, EU, UK 12 W 12V dc, 3 V dc, 4.5 V RS Stock No. 304-010 Subtotal (1 unit) €24.64(exc. VAT) €24.64/unit Quantity	-	-	AC/DC Adapter	Switched Mode Power Supply	12, 3, 4.5, 5, 6, 7.5, 9V dc	US, Australia, EU, UK	-	-	-	-	Multi-Choice	12W	1.8m	-	-	-	4	-	-	Multi-Head	79mm	0°C	-	25°C	40mm	-	-	-	CE, UKCA, UL, RCM	43mm	-	-	82%	-	264V ac	-
In Stock RS PRO Centre, 2.1 x 5.5 x 12 mm AC-DC Converter Power Supplies AC/DC Adapter 12.5 W 10V dc Output, 1.25 A RS Stock No. 139-2340 Subtotal (1 unit) €23.80(exc. VAT) €23.80/unit Quantity	-	-	AC/DC Adapter	AC-DC Converter Power Supplies	10V dc	-	-	-	-	-	Centre, 2.1 x 5.5 x 12 mm	12.5W	1.5m	-	-	-	1	-	1.25A	IEC 320-C8	97mm	-20°C	-	40°C	31mm	-	-	-	IEC/EN 61558	45mm	-	-	80.58%	-	240V ac	-
In Stock RS PRO AC/DC Adapter AC/DC Adapter 3-Pin (UK) 50.4 W 24V dc Output, 2.1 A RS Stock No. 201-2631 Subtotal (1 unit) €26.29(exc. VAT) €26.29/unit Quantity	-	-	AC/DC Adapter	AC/DC Adapter	24V dc	3-Pin (UK)	-	-	-	-	-	50.4W	-	-	-	-	1	-	2.1A	3-Pin Plug	-	0°C	Regulated	45°C	-	-	-	-	FCC, CCC, TUV, UL, cULus, CE	-	-	-	88%	-	240V ac	-
In Stock RS PRO 1.75 x 4.75 x 11 mm Centre Positive Female Coaxial Plug, 2.1 x 5.5 x 10.5 mm Centre Positive Female Coaxial Plug, RS Stock No. 904-8503 Subtotal (1 unit) €39.71(exc. VAT) €39.71/unit Quantity	-	-	AC/DC Adapter	Power Adapter	24V dc	C14	-	-	-	-	1.75 x 4.75 x 11 mm Centre Positive Female Coaxial Plug, 2.1 x 5.5 x 10.5 mm Centre Positive Female Coaxial Plug, 2.5 x 5.5 x 12.5 mm Centre Positive Female Coaxial Plug, 3 x 6.3 x 12 mm Centre Positive	72W	1.2m	-	-	-	1	-	3A	C14	113mm	0°C	-	40°C	35mm	-	-	-	FCC, ULcUL, ENIEC609501, CE, CB, GS, TUVSUD	49mm	-	-	88%	-	240V ac	-
In Stock RS PRO AC-DC Converter Power Supplies AC/DC Adapter UK 30 W 15V dc Output, 2 A RS Stock No. 200-8940 Subtotal (1 unit) €19.47(exc. VAT) €19.47/unit Quantity	-	-	AC/DC Adapter	AC-DC Converter Power Supplies	15V dc	UK	-	-	-	-	-	30W	-	-	-	-	1	-	2A	3-Pin Plug	210mm	0°C	Regulated	45°C	-	-	-	-	CCC, CE, cULus, FCC, TUV, UL	130mm	-	-	85%	-	240V ac	-
In Stock RS PRO Micro USB Type B USB Adapter AC/DC Adapter Global 12 W 5V dc Output, 2.4 A RS Stock No. 135-4176 Subtotal (1 unit) €14.59(exc. VAT) €14.59/unit Quantity	-	-	AC/DC Adapter	USB Adapter	5V dc	Global	-	-	-	-	Micro USB Type B	12W	29.45mm	-	-	-	1	-	2.4A	Universal Plug	29.45mm	-10°C	-	40°C	54.8mm	-	-	-	CE, EN 55013:2013, EN 55014-1:2006+A1+A2, EN 55014-2:1997+A1+A2, EN 55020:2007+A11, EN 55022:2010, EN 55024:2010, EN 61000-3-2:2014, EN 61000-3-3:2013	54.8mm	-	-	-	-	-	-
In Stock RS PRO 2.5 x 5.5 mm Centre Positive Power Supply AC/DC Adapter C14 36 W 12V dc Output RS Stock No. 304-022 Subtotal (1 unit) €27.67(exc. VAT) €27.67/unit Quantity	-	-	AC/DC Adapter	Power Supply	12V dc	C14	-	-	-	-	2.5 x 5.5 mm Centre Positive	36W	1.5m	-	-	-	1	-	-	C14	117.5mm	0°C	-	40°C	34mm	-	-	-	CCC, UL, CE, UKCA, SAA, PSE, KCC	47.5mm	-	-	88%	-	264V ac	-
In Stock RS PRO AC/DC Adapter 96 W 24V dc Output RS Stock No. 210-7466 Subtotal (1 unit) €47.85(exc. VAT) €47.85/unit Quantity	-	-	AC/DC Adapter	-	24V dc	-	-	-	-	-	-	96W	1.2m	-	-	-	1	-	-	IEC 320-C14	140mm	0°C	-	40°C	60.5mm	-	-	-	CCC, CE, cULus, FCC, TUV, UL	60.5mm	-	-	88%	-	264V ac	-
In Stock RS PRO 2.1 x 5.5 x 12 mm, Centre AC-DC Converter Power Supplies AC/DC Adapter 18 W 12V dc Output, 1.5 A RS Stock No. 139-2343 Subtotal (1 unit) €20.10(exc. VAT) €20.10/unit Quantity	-	-	AC/DC Adapter	AC-DC Converter Power Supplies	12V dc	-	-	-	-	-	2.1 x 5.5 x 12 mm, Centre	18W	1.5m	-	-	-	1	-	1.5A	IEC 320-C8	97mm	-20°C	-	40°C	31mm	-	-	-	IEC/EN 61558	45mm	-	-	85.25%	-	240V ac	-
In Stock RS PRO 2.1 x 5.5 x 12 mm Centre Positive AC/AC Adapter AC/AC Adapter Type G 20 W 24V ac Output, 800 mA RS Stock No. 139-1777 Subtotal (1 unit) €18.65(exc. VAT) €18.65/unit Quantity	-	-	AC/AC Adapter	AC/AC Adapter	24V ac	Type G	-	-	-	-	2.1 x 5.5 x 12 mm Centre Positive	20W	1.8m	-	-	-	1	-	800mA	UK Plug	87.2mm	-20°C	-	40°C	57mm	-	-	-	IEC/EN 61558	56.5mm	-	-	-	-	240V ac	-
In Stock RS PRO 2.1 x 5.5 mm Jack AC/DC Adapter Interchangeable 15 W 5V Output, 3 A RS Stock No. 270-7393 Subtotal (1 unit) €29.67(exc. VAT) €29.67/unit Quantity	-	-	AC/DC Adapter	-	5V	Interchangeable	-	-	-	-	2.1 x 5.5 mm Jack	15W	1500mm	-	-	-	1	-	3A	-	63.5mm	0°C	-	40°C	36mm	-	-	-	IEC/EN 62368-1	43.5mm	-	-	81.38%	-	264V ac	-
In Stock RS PRO 2.1 x 5.5 x 12 mm Centre Positive AC/AC Adapter AC/AC Adapter Type G 20 W 12V ac Output, 1.6 A RS Stock No. 139-1775 Subtotal (1 unit) €21.24(exc. VAT) €21.24/unit Quantity	-	-	AC/AC Adapter	AC/AC Adapter	12V ac	Type G	-	-	-	-	2.1 x 5.5 x 12 mm Centre Positive	20W	1.8m	-	-	-	1	-	1.6A	UK Plug	87.2mm	-20°C	-	40°C	57mm	-	-	-	IEC/EN 61558	56.5mm	-	-	-	-	240V ac	-