AC-DC Power Supplies

IQS Directory provides an extensive list of  AC-DC power supply manufacturers and suppliers. Utilize our website to review and source AC-DC power supply manufacturers with our easy-to-use features which allow you to locate AC-DC power supply companies that will design, engineer, and manufacture AC-DC power supplies for your exact specifications. Our request for quote forms make it easy to connect with leading AC-DC power supply manufacturers. View company profiles, website links, locations, phone number, product videos, customer reviews, product specific news articles and other production information. We are a leading manufacturer directory who will connect you with the right manufacturers whether you are looking for power supplies, industrial rectifiers, or ac to dc power supplies.

  • National City, CA

    TDK-Lambda Americas designs and manufactures a wide range of AC-DC and DC-DC power supplies and EMI Filters for Medical, Telecom, Industrial, Datacom, and Test & Measurement applications worldwide. The company has been a major provider of power solutions since 1948. TDK-Lambda is a subsidiary of the TDK Corporation, a leading global electronics company.

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  • Perris, CA

    Triad offers a wide variety of standard and custom power supplies in applications from industrial controls to medical, audio to alternative energy. We design and produce common-mode and differential mode chokes, as well as inductors that can be used for noise filtering. With over 1,500 standard parts and the capability to customize any of our products to meet your specific needs, our engineering team is available to assist you. Contact us today to let us know how we can help.

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  • Easton, PA

    For 4 decades, Acopian Power Supplies has specialized in long lasting power supplies (0 volts – 30000 V). 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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  • Hicksville, NY

    APS are specialists in power conversion and the manufacture of high performance power systems. Products include power converters and inverters; motor drives and brakes; battery chargers; AC and DC power supplies; driver circuits and more. Custom and standard power systems are available.

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  • Livermore, CA

    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. If you require something else, Quail Electronics can manufacture a custom cord to meet your specific needs. Call us today for your product needs.

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AC-DC Power Supplies Industry Information

AC-DC Power Supply

An AC-DC power supply is a power supply that has the ability to transform one type of power, an alternating current (AC), into another type of power called a direct current (DC). Most people use electrical equipment that requires both forms of electricity on a daily basis.

In the medical and industrial equipment areas, interest in AC-DC power supplies is increasing because these power supplies come with safety clearances and the ability to operate in unreliable situations.

Quick links to AC-DC Power Supply Information

Purpose of an AC-DC Power Supply

An AC-DC power supply's objectives are to:

  • Generate and transmit the proper current and voltage values.
  • Change the AC power entering homes over power lines into DC power.
  • Maintain current flow for applications that require accurate DC voltage.
  • Change the AC power into DC without affecting the voltage source or the operation of any connected devices.

How an AC-DC Power Supply Works

The basic configurations of an AC-DC power supply vary with the device, but the core principles remain the same. They consist of the following main components:

The Transformer

Steps down the voltage levels of the alternating current entering the device.

Power Supply Transformer


Convert the sinusoidal waveform of the alternating current to the continuous positive peaks of the direct current. Irregularities in the waveform are observed as its phase changes.

The Filter

Acts as a capacitor. When the transformed voltage falls below a certain level, the capacitor works as a reservoir of power that can be transmitted to the output. When the voltage increases, the capacitor can store the incoming energy and convert it into output when the voltage decreases. This significantly reduces voltage droop and enhances voltage constancy.

Power Supply Filter

In summary, an AC-DC power supply converts alternating current into direct current with a smooth output for practical use.

Benefits of an AC-DC Power Supply

  • DC power is substantially more useful in the context of voltage distribution, which is why a large number of everyday gadgets, like cellphones, are charged by DC sources.
  • All devices' batteries require a DC power source.
  • AC power source is cheaper to distribute, but it commonly causes melting wires in residential areas, electrical sparks in appliances, and power surges, all of which can severely harm your devices. An AC-DC power supply addresses these challenges.
  • Using an AC-DC power source significantly decreases power instability and wastage.
  • Because the high potential of AC power is deadly to consumers if they come into contact with it, an AC-DC power source improves the overall safety of electrical systems.

Applications of AC-DC Power Supplies

  • Computers, televisions, cell phone chargers, and other electronic consumer gadgets use AC-DC converters. An AC-DC power supply is also used by medical, military, and telecommunications equipment, as well as domestic appliances, industrial gear, and commercial products that use DC motors.