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This section provides an overview for power supply systems as well as their applications and principles. Also, please take a look at the list of 13 power supply system manufacturers and their company rankings. Here are the top-ranked power supply system companies as of July, 2025: 1.TDK-Lambda Corporation, 2.Applied Power Systems, Inc., 3.Acopian Technical Company.
Table of Contents
A power supply system is a device that converts an AC power source, such as an electrical outlet, into a stable DC power source.
AC power sources such as electrical outlets, whether for industrial or residential use, are high voltage and cannot be used for electronic equipment as they are. Therefore, it is necessary to convert the voltage to a DC voltage suitable for the equipment.
Power supplies are generally classified into two types: switching type and transformer type, but switching type is currently the mainstream due to its small size, lightweight, and high efficiency.
As the name suggests, power supply systems are a device used to supply power. Since they are used to convert AC power to DC voltage suitable for electronic equipment, they are built into almost all electronic equipment found in every home.
It is used in every electronic device so that when you connect a cable to a wall outlet, you might expect to find power supply systems on the other end of the cable.
Since it is a device that can regulate voltage, power supply systems can provide power voltage without the need for a transformer.
In a transformer-based power supply system, the AC power supply system voltage is transformed to an appropriate voltage by a transformer and rectified to DC by a rectifier. The rectifier rectifies the rectified voltage to DC, which is then smoothed by a capacitor to supply a stabilized DC voltage.
In a switching-type power supply system, the AC power supply system's voltage is converted to DC, which is then converted to pulsed high-frequency power by a high-speed switching circuit. This high-frequency power is rectified and smoothed using a transformer to obtain a suitable DC output voltage.
The transformer method can suppress noise to a small level, but it is large and heavy, and its power efficiency is poor. In contrast, the switching method can be highly efficient and lightweight, but it is noisier.
Since power supply systems cannot operate at 100% efficiency, losses are converted to heat, and heat is generated. The amount of heat generated is generally determined by the following equation:
Heat generation (W) = input power - output power = (output power/efficiency) - output power
If the amount of heat generated becomes too great, it may cause a drop in output power or a failure.
Power supplies are simple in structure and can be made by the user. The materials required are resistors, smoothing capacitors, and diodes.
First, the receiving voltage is dropped by the resistor. Then, the diode is used to change it to a direct current. At this point, two diodes are required if full-wave rectification is desired.
Finally, a smoothing capacitor is connected in parallel with the load to complete the process. A resistor can be substituted for the transformer. The capacity of the power supply systems is determined by the capacitance of these individual parts. If multiple loads are to be connected, more capacity is required.
Industrial power supplies are generally housed in control panels and are small enough to be attached to the panel. Currently, DIN-rail mounting is the mainstream.
In homes, power supplies are the AC adapters used to charge PCs and smartphones. They have been miniaturized and are now palm-sized. In audio equipment, power supplies are used for amplifiers. They are also palm-sized and can distribute power to as many as eight devices.
In terms of audio equipment, power supply systems are a device that supplies power to effectors and other devices. Effectors are devices that add effects such as reverbs and low-pass filters to music. As a classification, they can be divided into analog and digital devices.
A single power supply system itself can supply power to any number of effectors as long as they are under the capacity. However, if analog and digital effectors are connected to the same power supply systems, noise will be generated.
The cause is the way digital effectors work. Digital effectors use electronic circuits to convert audio and electrical signals with choppers and other devices to create square waves. Square waves distort analog waveforms, resulting in audio noise.
To prevent noise, separate the power supply systems for analog and digital effectors. By electrically isolating them, noise caused by square waves can be eliminated.
*Including some distributors, etc.
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Tried Magnetics was founded in the 1940s and is based in Perris, California. The ISO 9001:2015-certified company serves industrial equipment, renewable energy, medical equipment, and other industries as a manufacturer of components using standard and custom magnetic components including transformers, power supplies, and inductors. The company’s custom magnetics division encompasses power and audio transformers, chokes, and power supplies used across industries. The company’s engineering development kits and design sample kits include a sampling of power ranges, sizes, and packaging styles within specific product lines to assist customers in choosing final designs for prototyping.
Applied Power Systems, Inc. (APS) was founded in 196 and headquartered in Hicksville, New York. Applied Power Systems is a power electronics company specializing in power conversion systems and thermal management of high power semiconductors. APS offers a large selection of high power thermal management products. These products include standard and custom aluminum extrusion heat sinks for natural convection and forced air-cooling. Cast and machined copper chill plates for liquid cooling. State of the art clamps for flat pack or hockey puck semiconductors. APS also offers driver circuit boards to drive SCR, IGBT and MOSFET devices.
Acopian, founded in 1964 in Easton, Pennsylvania, USA, is a manufacturer and supplier of quality power conversion products. The company specializes in offering a wide range of power supplies, including AC-DC power supplies, DC-DC converters, and custom power solutions. These products play a vital role in providing efficient power to various electronic systems and applications. Acopian's power solutions are utilized across industries such as aerospace, medical, and telecommunications. Emphasizing precision and performance, Acopian continues to be an ideal partner in delivering stable and dependable power solutions for critical applications.
SMTmax, headquartered in California and established in 2009, is a manufacturer and supplier of SMT tools and equipment for both prototyping and production purposes. Its product offerings encompass pick and place machines, stencil printers, BGA stations, reflow ovens, station parts, and have expanded into the dental clinic and lab fields. The company also provides additional services such as circuit board production, electronic test and measurement instrument manufacturing, customized electronic hardware design, and software development, making them a comprehensive solution for various electronic and manufacturing needs.
FRIWO is a worldwide company based in Ostbevern, Germany, a manufacturer that specializes in the design and development of power supplies and charging solutions. Established in in 1971, this company specializes in delivering power solutions to a wide range of industries, including medical technology, industrial automation, and consumer electronics. Their product lineup includes AC/DC power supplies, DC/DC converters, battery packs, and chargers. Notably, they offer the FRIWO FOX Charger, a compact and adaptable charger designed for diverse applications. This charger boasts fast charging capabilities, intelligent charging management, and compatibility with various battery chemistries, making it a versatile choice for customers.
CAEN S.p.A., established in 1979 and based in Viareggio, Italy, is a manufacturer of high and low-voltage power supply systems and front-end/ data acquisition modules. The company also manufactures other products such as modular pulse processing electronics, waveform digitizers, educational kits, power supplies, and digital detector emulators and supplies to different industries, including medical applications, astrophysics, neutrino physics, material science, and homeland security. The company products meet IEEE standards for nuclear and particle physics.
TDK-Lambda serves the communications, medical, factory automation, semiconductor, transportation, LED display, and energy industries with a variety of power-related products. Among these products are onboard power supplies, PC board power supplies, noise filters, linear power supplies, unit and configurable power supplies, programmables power supplies, power modules, and bidirectional DC-DC converters.
Changzhou Mingseal Robot Technology Co. Ltd. is a manufacturer of semiconductor production machinery and equipment established in 2008 in Changzhou, Jiangsu, China. The company’s products include underfill dispensing machines for enhancing the mechanical strength or thermal cycling performance of semiconductor packages, and wafer-level dispensing systems for precision in wafer processing. It also offers soldering systems designed for accuracy and precision in the electronic assembly process. The company’s products are used in the semiconductor, consumer electronics, and communications industries.
Heinz Soyer Bolzenschweißtechnik GmbH, founded in 1970, is a manufacturer and supplier based in Wörthsee, Germany, producing welding studs and stud welding equipment. The company offers a range of welding studs, including coarse threaded and threaded studs, with and without flanges. Its stud welding equipment varies from compact and battery-operated to universal options, complete with stud welding guns and accessory sets. The company notably holds a patent for SRM Technology, a welding process in radial symmetrical magnetic fields, enabling safe and clean welding without applying ceramic rings. This process finds applications, especially in automated stud welding plants and large-scale component productions.
Toshiba has nearly a century-and-a-half-long history of pioneering the development of electrical equipment in Japan, providing customers with products and services such as energy systems and solutions and infrastructure systems and solutions. With a focus on digital technologies, Toshiba boasts cutting-edge products in semiconductors, barcode printers, and rechargeable Lithium-ion battery cells, modules, and industrial pack series. With arms in business, R & D, AI, sustainability, and digital solutions, Toshiba and its people evolve with the times, ensuring its continuing ability to solve ever-changing social issues through constant change. By utilizing the knowledge that Toshiba has amassed across numerous business domains, along with cutting-edge technologies like IoT, AI, and quantum related technologies, they have created digital solutions that provide our customers with new value and services
Swagelok is a manufacturer and supplier of fluid system parts and components that was established in Cleveland, Ohio, USA, in 1947. The company’s product lineup includes various industrial valves for controlling fluid direction or pressure, tube fittings and adaptors for stable connectivity in systems or assemblies, and filters for separating contaminants. It also offers back-pressure, dome-loaded, and spring-loaded regulators for maintaining consistency in fluid system performance. The company operates internationally, with authorized service centers and sales locations in over 70 countries. Its products are typically used in oil and gas, biopharmaceutical, and chemical refining operations.
Ranking as of July 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | TDK-Lambda Corporation |
15.1%
|
| 2 | Applied Power Systems, Inc. |
12.9%
|
| 3 | Acopian Technical Company |
11.8%
|
| 4 | Triad Magnetics |
10.8%
|
| 5 | CAEN S.p.A. |
9.7%
|
| 6 | FRIWO Gerätebau GmbH |
8.6%
|
| 7 | Changzhou Mingseal Robot Technology Co., Ltd. |
6.5%
|
| 8 | SMTmax |
6.5%
|
| 9 | Heinz Soyer Bolzenschweißtechnik GmbH |
5.4%
|
| 10 | TOSHIBA CORPORATION |
5.4%
|
Derivation Method
The ranking is calculated based on the click share within the power supply system page as of July 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
4 | 40.0% |
|
Japan
|
3 | 30.0% |
|
Germany
|
2 | 20.0% |
|
Italy
|
1 | 10.0% |
174 products found
174 products
TEXIO TECHNOLOGY CORPORATION
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■Highly accurate simulation of each battery cell voltage, including BMS evaluation The PMS Series, an isolated multi-channel high-resolution DC pow...
4 models listed
TEXIO TECHNOLOGY CORPORATION
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■100W class multifunctional, high precision, low noise DC stabilized power supply The PPX series is a small, low-noise DC stabilized power supply. ...
TEXIO TECHNOLOGY CORPORATION
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■100W class multifunctional, high precision, low noise DC stabilized power supply The PPX series is a small, low-noise DC stabilized power supply. ...
Kenko Professional Imaging Co., Ltd.
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■Product features The most powerful and innovative power pack in GODOX's flash system. Ultra power and speed of up to 2,400Ws achieved through a fu...
TEXIO TECHNOLOGY CORPORATION
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■100W class multifunctional, high precision, low noise DC stabilized power supply The PPX series is a small, low-noise DC stabilized power supply. ...
TEXIO TECHNOLOGY CORPORATION
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■100W class multifunctional, high precision, low noise DC stabilized power supply The PPX series is a small, low-noise DC stabilized power supply. ...
Matsuda Tsusho Co., Ltd.
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4ch power supply. Termination and external program input can be turned on/off. PS-704 is a 4ch power supply. Termination of each channel and extern...
TEXIO TECHNOLOGY CORPORATION
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■100W class multifunctional, high precision, low noise DC stabilized power supply The PPX series is a small, low-noise DC stabilized power supply. ...
TEXIO TECHNOLOGY CORPORATION
250+ people viewing
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■100W class multifunctional, high precision, low noise DC stabilized power supply The PPX series is a small, low-noise DC stabilized power supply. ...
TEXIO TECHNOLOGY CORPORATION
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■100W class multifunctional, high precision, low noise DC stabilized power supply The PPX series is a small, low-noise DC stabilized power supply. ...
TEXIO TECHNOLOGY CORPORATION
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■100W class multifunctional, high precision, low noise DC stabilized power supply The PPX series is a small, low-noise DC stabilized power supply. ...
TEXIO TECHNOLOGY CORPORATION
500+ people viewing
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■Multi-functional dropper type power supply This is an ultra-low noise, multi-functional dropper power supply consisting of a 1-output transformer ...
4 models listed
Yagyu Shokai Co., Ltd.
310+ people viewing
Last viewed: 4 hours ago
■Features - The PSW series is a switching type DC stabilized power supply that can output a wide range of voltage and current within the maximum ra...
Yagyu Shokai Co., Ltd.
220+ people viewing
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■Features ・High resolution model of 1mV/1mA (PS30V5A10 is 10mV/10mA). - 3.95-inch TFT LCD display for excellent visibility. - Displays voltage, po...
Yagyu Shokai Co., Ltd.
330+ people viewing
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■Features - Lightweight and small power supply for electrophoresis. - Adopts automatic cross mode method with constant voltage and constant current...
Yagyu Shokai Co., Ltd.
350+ people viewing
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This is a small and lightweight power supply device for electrophoresis.
Yagyu Shokai Co., Ltd.
350+ people viewing
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■Features - Up to 30 types of program settings are possible. - Compact size and space saving.
Yagyu Shokai Co., Ltd.
220+ people viewing
■Features ・One unit can output 2 to 4 channels. ・Low noise and high resolution using dropper method. - Compatible with digital control via GP-IB,...
Yagyu Shokai Co., Ltd.
260+ people viewing
Last viewed: 16 hours ago
■Features - Can be used in two ways as a constant voltage power supply or constant current power supply. ・It is a slim type that can be placed in ...
Yagyu Shokai Co., Ltd.
270+ people viewing
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■Features ・Series regulator type, low ripple and low noise. ・Output voltage or output current can be externally controlled at 0 to 10V. ・Paralle...
Yagyu Shokai Co., Ltd.
170+ people viewing
Last viewed: 16 hours ago
■Features - Comes with a carrying belt for easy movement.
IDEC Co., Ltd.
590+ people viewing
Last viewed: 7 hours ago
■Features ・Compact size contributes to downsizing of equipment ・Suitable for operating ambient temperature of -25 to 70℃. It can be used in a wid...
Towa Electronics Co., Ltd.
600+ people viewing
Last viewed: 3 hours ago
■Features ・Front-end power supply that achieves high power density ・Low profile (1U size) ・High voltage output (FETA3000BC/7000T/7000ST) ・High ...
Towa Electronics Co., Ltd.
540+ people viewing
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■Features ・Fanless structure (conduction cooling type) - Low profile and compatible with 1.5U size (height 65mm) ・Wide input 3φ 180~528VAC ・12V ...
Towa Electronics Co., Ltd.
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■Features ・Low profile and compatible with 1U size (height 41mm) ・Wide input 3Φ 180~528VAC ・12V1A with AUX output ・Compliant with SEMI F47 stan...
Optron Science Co., Ltd.
200+ people viewing
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■Summary Two types of power supplies are available: 5V (using red LED) and 9V (using blue LED)
Compucase Japan Co., Ltd.
310+ people viewing
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Intel ATX 3.0 compliant ■Passed Intel ATX 3.0 official certification Meet the power requirements of new generation CPU and graphics cards ■Other f...
Compucase Japan Co., Ltd.
270+ people viewing
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■Features - Compliant with ATX12V version 2.2 standard ・12cmFAN power supply - Equipped with protection circuits: OPP (overload protection), OVP (...
Compucase Japan Co., Ltd.
260+ people viewing
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■Features ・Compliant with TFX12V version 2.3 standard ・ Equipped with 8cm FAN - Equipped with protection circuits: OPP (overload protection), OVP...
Compucase Japan Co., Ltd.
240+ people viewing
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■Features ・Equipped with 8cm FAN ・Equipped with protection circuits: OPP (overpower protection), OVP (overvoltage protection), SCP (short circuit...
