Annual break: Please be aware that we will not be processing new website orders between the 18-26th of September, orders received over this period will be processed as soon as possible upon our return on Monday the 27th. If you need your order sooner than this please place it before Thursday the 16th to ensure timely dispatch. Do let us know if you have any questions.

Mains to 12V DC 20A Power Supply/Adapter, Steady Output


This power supply is designed to provide a steady output of up to 20A at 12V DC, and is intended for use with electric heaters, lighting and other resistive loads. A sensitive safety (over-current) cut-out circuit means that this power supply shouldn't be used with larger inductive loads such as electric motors or actuators rated beyond 8A.

These units differ from many similarly sized adapters in having a pre-installed UK mains input lead (with 5A 3-pin fused plug), and a 0.7m long dual-core output cable, making them much easier to install for most applications. The input should be a mains AC voltage of between 170V~240V AC, 50/60 HZ.

£10.00 £12.00 inc VAT

The housing of the power supply includes a ducted fan for cooling (this is always-on by default, for applications with a duty cycle of 15% or less and in an environment below 35°C the fan may be disabled).

Mounting brackets at either end of the body enable easy mounting of the supply. 

See the technical details tab for a list of specifications.


Input Voltage: 100V~240V AC, 50/60 HZ

Output Voltage: 12V DC

Output Current: Up to 20A continuous for resistive loads, up to 8A for inductive loads (such as electric motors). High-sensitivity overcurrent cut-out fitted.

Operating temperature: 0°C ~ +60°C (with built-in over-temp sensor)

Adapter body size: 240 x 90 x 50mm

Weight: 950g

Case material: Aluminium, with plastic end faces and brackets

Output lead: PVC-insulated flat twin, red and black sleeved cores 2mm2 each (supplied with an easily removable screw-terminal connector fitted to the end)

Related Products

300mm DC connector lead 2.1x5.5mm

300mm DC connector lead 2.1x5.5mm

from £1.50 £1.80 inc VAT

A dual-core direct current (DC) connector lead for interfacing with other DC-connector devices

Twin Core PVC Insulated DC Power Cable, Flat

Twin Core PVC Insulated DC Power Cable, Flat

£1.23 £1.48 inc VAT

Twin core cable ideal for carrying DC electrical currents, particularly for automotive and marine applications, and also power routing for actuators