You are in the: Small Business Computing Channelarrow View Sites +
Small Business Technology
» ECommerce-Guide | Small Business Computing | Webopedia | WinPlanet |  »Close
Enter a word for a definition... ...or choose a computer category.

   Term of the Day
   New Terms
   New Links
   Quick Reference
   Did You Know?
   Tech Support
   Webopedia Jobs
   About Us
   Link to Us

talk to us
   Submit a URL
   Suggest a Term
   Report an Error
Internet Lists
Internet News
Internet Resources
Linux/Open Source
Personal Technology
Small Business
Windows Technology
xSP Resources
Corporate Info
Tech Jobs
E-mail Offers
  Be a Commerce Partner

power supply
Last modified: Thursday, April 01, 2004 

(n.) Also called a power supply unit or PSU, the component that supplies power to a computer. Most personal computers can be plugged into standard electrical outlets. The power supply then pulls the required amount of electricity and converts the AC current to DC current. It also regulates the voltage to eliminate spikes and surges common in most electrical systems. Not all power supplies, however, do an adequate voltage-regulation job, so a computer is always susceptible to large voltage fluctuations.

Power supplies are rated in terms of the number of watts they generate. The more powerful the computer, the more watts it can provide to components.

E-mail this definition to a colleague

Sponsored listings

Thomas Global Register: Power Supplies - Industrial product directory allows users to send RFQs, view catalogues and compare suppliers. Search for suppliers of Power Supplies.

QuadTech: Electrical Power Supplies - Manufactures a complete line of hipot testers, LCR meters and digibridges, medical safety analyzers, megohmmeters, milliohmmeters and cable testers.

Raychem Circuit Protection: Power Conditioners - PPTC device pioneer. Supplies a complete line of circuit protection solutions: Overcurrent, Overvoltage and ESD protection.

For pages about power supply . Also check out the following links!

Related Links

A Different Perspective on Power Supplies 
With the latest system components putting ever-higher stress on a computer’s power supply, how do you know how much power your system needs? And with transformers, rectifiers, filters and voltage regulators to consider, how can you pick a good power supply?

PC Mechanic - online guide to computer hardware 
Contains overviews, purchasing and installation information for PC motherboards, memory, drives, expansion cards, and power supplies. Also contains links to companies and manufacturers and PC hardware related links.

PC external power and power supply reference
A reference guide looking at the power systems of the PC from the inside and out. Covers electricity basics, power problems, UPSs, power supply functions, form factors, and sizing and output.

Power Supply Function and Signals
Describes AC-DC voltage conversion, different voltages supplied, the Power Good signal, and power loading. This page is part of "The PC Guide".

Troubleshooting Power Sources and Power Protection Devices
Lists some typical problems related to the system power, including external power problems, power protection devices (surge suppressors, UPSes, etc.) and the internal power supply. This page is from "The PC Guide."

Yahoo!'s power supply companies page
Yahoo!'s directory of power supply companies.

Sponsored listings

Schumacher Electric: Power Conditioners - Designs and manufactures custom transformers for the electronics industry, as well as assemblies, battery chargers, and welding accessories..

Elgar Electronics: Power Conditioners - Manufacturing DC power supplies and power-related products for the semiconductor, telecommunications, and measurement and control markets.

Powertronix: Specialty Power Supplies - Supplies AC power supplies, toroidal power transformers, current transformers, DC power supplies, and DC filter chokes/inductors.

Red Lioni Controls: Power Supplies - Manufactures industrial control products including human machine interface panels, digital and analog panel meters and process control devices. Power Supplies - Provides database of suppliers for Power Supplies. Browse catalogs and view technical information.

related categories

Electronic Technology


related terms

clamping voltage

power brick

power conditioner


voltage regulator


Give Us Your

power supply Products
Compare Products,Prices and Stores

Shop by Category:
PC Desktops
24 Model Matches

System Power Supplies
2242 Model Matches

Electronics Miscellaneous
312 Store Offers

5 Model Matches

Office Supplies
710 Store Offers

JupiterWeb networks:

Search JupiterWeb:

Jupitermedia Corporation has two divisions:
Jupiterimages andJupiterWeb

Legal Notices, Licensing, Reprints, & Permissions, Privacy Policy.

Jupitermedia Corporate Info | Newsletters | Tech Jobs | Shopping | E-mail Offers