AC Power Supply

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It is the opposite of DC, or direct current, and the electricity reverses direction back and fourth at regular intervals, generally multiple times per second. This alternation is measured in Hertz; in the United States and many other countries, AC power is generated at 60 Hertz, meaning the current alternates 60 times in a second. Read Moreā€¦

AC Power Supply An AC power supply is a device that is used to produce AC power for other devices and pieces of equipment. AC, or alternating current, is the electricity that comes from a wall outlet and is used in residential and commercial buildings all over the world.

Leading Manufacturers

New Brunswick, NJ  |  732-249-2656

MEGA manufactures AC/DC ITE and medical (60601-1 4th ed) power supplies in wall plug in, desk top and open frame packages up to 800W. Designed to get the job done at a reasonable price, supplies carry multiple approvals to make it possible to ship one supply globally.

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MEGA Electronics, Inc. $$$

Livermore, CA  |  800-669-8090

At Quail Electronics, we are your power cord specialists. Our power supplies consist of green dot cords, high voltage cords, North American and international cords, specialty cords, plus adapters, plugs and strips.

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Quail Electronics, Inc. $$$

Germantown, WI  |  262-255-6222

For over 60 years, Wago has specialized in long lasting power supplies. We offer AC power supplies, DC power supplies, AC to DC converters, uninterruptible power supply (UPS), AC to DC power supplies & high voltage power supplies. With quality customer service & technical support, we have thousands of power supplies for thousands of applications.

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Wago Corp. $$$

Hatboro, PA  |  215-674-8773

Cobra Wire & Cable produces the highest quality and widest variety of flexible power cable products -- in stock and ready to ship. Whether your application is Marine OEM or aftermarket, uninterruptible power supply, central office power, alternative energy or data centers, Cobra has the cable and hardware to match your electrical application.

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Cobra Wire & Cable $$$

Dover, NJ  |  973-345-5885

A cutting-edge power supply manufacturer, Polytron Devices products are sold worldwide. Choose from uninterruptible power supplies, DC power supplies, AC to DC converters, & more. Our linear power modules, switching power supplies, & DC/DC converters are tested to exacting standards for computer, telecommunications & many other industrial and commercial applications. In business since 1969.

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Polytron Devices, Inc $$$
placeholder image MEGA Electronics, Inc. Quail Electronics, Inc. Wago Corp. Cobra Wire & Cable Polytron Devices, Inc

Most power plants generate AC electricity rather than DC electricity. Power lines, held up by telephone poles that are connected to every residential building and most commercial, carry high voltages of AC power. However, the higher the voltage, the more insulation it requires. Most alternating power is converted inside buildings because many appliances only run on DC power, including printers, laptops, battery chargers and desktop computers.

Other electrical devices found in the home, like lamps, radios, fans, televisions and small appliances run off the electricity directly from the wall outlets, which is the AC power. In industrial applications, devices and machinery like generators, dynamotors, inverters and transformers all use AC power to operate. AC current can also be used in telecommunications to convey information instead of electricity. They are used in radio and telephone lines.



The wavelength of AC power is always a sine wave, which exhibits smooth, repetitive oscillation. The rate of changing direction is called the frequency, which is measured in Hertz. 50 Hertz, for example, refers to the number of back and fourth cycles each second. The frequency of the wave can be increased or decreased dramatically by a transformer, which increases the frequency when the wave must travel great distances.

AC power supplies generally have adjustable output settings for component response testing at different voltages, currents and frequencies, since each application requires different amounts of each because of many different factors, such as distance traveled and maximum voltage. These are also used in testing motors and other electrical equipment whose input valves may vary. AC power comes from a variety of configurations, including bench top, DIN rail, rack mounted and cabinet styles.