Farnell Advance PSU N20013 In 250VAC 0.6-2.5A Out 2x12Vdc 20W OM0826

£40.00

4 in stock

SKU: OM0826 Category:

Description

RICH ELECTRONICS

WE PURCHASE AND RECYCLE 

SURPLUS ELECTRONIC COMPONENTS

AND EQUIPMENT!

For sale here we have the above part…

These are a quality power supply retrieved from large OEM Server units. They have been used but are fully working and in good condition, as with all our items they come with a full guarantee.

Can be securely mounted as design includes an integral 4 threaded hole bracket, see photographs.

Linear in style, linear power supplies deliver DC by passing the primary AC voltage through a transformer and then filtering it to remove the AC component, Linear regulators were the power supplies of choice until the 1970s for converting alternating current (AC) into a steady direct current (DC) for electronic devices. While this power supply type isn’t used as prevalently today, it’s still the best choice for applications that require minimal noise and ripple.

The main component that allows a linear regulator to function is a steel or iron transformer. This transformer provides two functions:

  • It acts as a barrier to separate high voltage AC input from low voltage DC input, which also filters out any noise getting into the output voltage.
  • It reduces AC input from 240V to approximately 30V which can then be converted to a steady DC voltage, in this case 2 x 12Vdc.

AC voltage is first lowered by the transformer and then rectified by several diodes. It’s then smoothed into a low DC voltage by a pair of large electrolytic capacitors. This low DC voltage is then regulated as a steady output voltage with the use of a transistor or integrated circuit.

power-supply-with-a-linear-regulator

Linear regulators are known for their poor efficiency and large size, but they do provide a noise-free output voltage. This makes them ideal for any device that requires high-frequency and low-noise, such as…..

 

  • Control circuits
  • Low noise amplifiers
  • Signal processors
  • Automated & laboratory test equipment
  • Data acquisition sensors & circuits

Weight approx 2.2 kilos, they contain a large toroidal transformer which is approx 100 mm in diameter

Powered via a fused iec 3 pin input socket, we stock the IEC UK power lead if required.

The 2 x 12V output sockets are the 4 pin molex type connectors as used in the older tower and desktop computers to power hard drives, CD ROM’s, dvd’s etc. we stock a plug to socket lead to suit if required.

Info provided by a recent customer:

“Received power supply today and am very pleased with it. It is quite sophisticated incorporating a 2.15 amp delay fuse in the primary circuit of the mains transformer. The output is bridge rectified and smoothed conventionally with a 10,000uf 50vw capacitor for initial smoothing. The remainder of the circuitry is complex incorporating at least 3 I.C’s , two S.C.R.,s and an N channel power MOSFET, ( which I think is the main regulating element of the circuit ). The main outputs are fuse protected at 3.15 amps and red led indicators are incorporated to indicate ” fuse blown ” condition. On test I have found the 12vdc output to be practically spot on and regulation is good between no load and test load of 1.5 amps. The unit has proved to be capable of supporting two 12v 20 watt lamp loads, sustained with no significant temperature rise within the unit. Automatic shutdown is incorporated by way of a thermal trip on the main heatsink.” 

These parts came to us as part of a lot of surplus stock from a large ‘Milspec’ type Co. and have been kept in storage for some time, we have therefore classified them as ‘new other’. They are however in good serviceable condition, the photographs are representative of their general condition, and, as with all our products they come with a full guarantee. 

PLEASE NOTE!

If you have similar items to this, or indeed any electronic components that are surplus to requirements please contact us with details.

Additional information

Brand

MPN