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This section provides an overview for diode modules as well as their applications and principles. Also, please take a look at the list of 27 diode module manufacturers and their company rankings. Here are the top-ranked diode module companies as of July, 2025: 1.Sensitron Semiconductor, 2.Powersem GmbH, 3.TDK-Lambda Corporation.
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Engaged in research on nitride semiconductor growth using the MBE method at Waseda University Graduate School. After graduating from graduate school in 2016, he joined a non-ferrous metal manufacturer.
Engaged in equipment maintenance and engineering work at metal smelting plants. Moved to a chemical manufacturer in 2022. Engaging in similar tasks.
A diode module is a semiconductor rectifier device that controls the conduction and interruption of electricity by arranging multiple diodes.
Diode modules have the characteristic of being able to control the flow of current in only one direction in an electric circuit, and are generally incorporated as relay components in circuit design.
Elements with similar behavior include thyristors and triacs. Depending on the process you wish to implement, these modules are used in different ways.
Diode modules are widely used components in industrial products.
The following are examples of applications of diode modules:
Diodes are widely used inside DC power supplies because they allow current from an AC power supply to be taken out in only one direction. When used in conjunction with a smoothing capacitor, etc., AC current can be converted to DC current.
To understand the principle of the diode module, it is necessary to understand the structure of a diode. The internal structure of a diode consists of alternating layers of n-type and p-type semiconductors, which conduct when voltage is applied from the anode side to the cathode side. On the other hand, when voltage is applied in the opposite direction, charge moves away from the internal n- and p-type semiconductors, resulting in no current flow.
Using this characteristic, the diode can be used as a graded-grain element in which electricity flows in one direction.
There are various types of diodes depending on their properties.
A diode that rectifies alternating current by allowing it to flow in. They are also called silicon diodes. They are used in power supply circuits and protection circuits by taking advantage of the property that electricity flows in only one direction.
A well-known example is a diode bridge that combines four rectifier diodes.
A diode that extracts audio signals from radio waves by taking advantage of its low forward voltage drop in the low current range (around 0.1 mA). They are used for voice communications, such as radios.
In the past, germanium diodes were often used. However, they are now being replaced by Schottky barrier diodes due to their extremely high cost.
A diode whose voltage remains constant even when the current changes. Also called a Zener diode. They are used in over-voltage protection circuits by utilizing the Zener phenomenon, in which electricity flows at a constant voltage when voltage is applied in the reverse direction.
A photodiode that utilizes the property of light at the PN junction to generate an electric current and voltage. They are used in photoelectric sensors and optical communications.
They are sometimes used in solar cells, in devices that read laser light reflected from uneven surfaces on DVDs, and in the receiving part of TV remote controls.
A diode that conducts a constant current when the voltage is within a predetermined range. Applying a voltage higher than a predetermined level may damage the diode. They are used in battery charging/discharging circuits and ground-fault circuit breakers.
Thyristor is a semiconductor component with a gate electrode added to a Diode Module, which conducts when a positive bias is applied from the anode side to the cathode side in the circuit and a gate current flows.
Once gate current flows, the module maintains conduction until the next time the bias from the anode side to the cathode side becomes negative or the gate current becomes zero.
Also, thyristors will only conduct with a unidirectional bias. If you want to operate against bias in both directions, a triac with thyristors installed in both directions is used.
Like diode modules, power modules are used in power circuits. Power modules also perform switching and rectification, but they are used in products that require high voltage and high power.
A familiar example is an inverter that controls the speed of a motor in a railroad, for example. As a response to energy conservation, the improvement of the efficiency of power devices that handle high voltage and high power is attracting worldwide attention.
*Including some distributors, etc.
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Sensitron Semiconductor, founded in 1969 with corporate headquarters located in the USA, is a manufacturer of power electronic components and systems for the defense, aerospace, space, and medical markets. The company's products include high-power rectifier bridges, motion control modules, TVS modules, solid-state power controllers, and high voltage diode assemblies, as well as various services including, engineering, electrical and mechanical design, material science expertise, and testing of a finished power system. The company's facility includes a wafer fabrication clean room and a microelectronics manufacturing clean room.
Vishay Intertechnology, Inc. (Vishay) was incorporated in 1962 and is headquartered in Malvern, Pennsylvania. The company serves the industrial, automotive, telecommunications, consumer products, and medical end markets and sells its products under numerous brand names inlcuding Siliconix, Draloric, Beyschlag, UltraSource, and Applied Thin-Film Products. The company manufactures and sells discrete semiconductors and passive electronic components in globally while operating in six market segments: MOSFETs, diodes, optoelectronic components, resistors, inductors, and capacitors.
Coherent, founded in 1971, and located in Saxonburg, Pennsylvania, is a manufacturer, supplier and distributor of laser and photonics-based solutions. Their product range includes lasers, optics, and laser-based systems for industries such as industrial, communications, electronics, and instrumentation markets. Coherent's lasers are used in precision cutting, welding, medical procedures, and scientific experiments. With ISO 9001 certification, the company ensures quality standards in their products, and solutions across various industrial applications.
Newport is a division of MKS Instruments, Inc. that was incorporated in 1961 and headquartered in Andover, Massachusetts. The company is a manufacturing company that serves the specialty industrial, advanced electronics, and semiconductor industries. The company markets its products through Spectra-Physics, MKS Instruments, Richardson Grating, and other brands. Their product categories include motion, optomechanics, optics, and vacuum instruments. Product categories include lasers, MKS vacuum & gas solutions, laser diode controls, and tables & isolation systems.
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.
Mitsubishi Electric was established in Japan in 1921 and headquartered in Tokyo. The company’s Semiconductors & Devices division is a manufacturer of products serving several industries ranging from home appliances and automotive to renewable energy and optical fiber communication. The company’s products are divided into 4 product segments: power devices, high-frequency devices, optical devices, and infrared sensors. Power devices encompass motion controls, most home appliances, and SiC applications. High-frequency devices include satellite communications systems, radios, and base transceiver stations. Optical devices include projector light sources and optical fiber communication. Infrared sensing systems include MeIDIR thermal sensors.
Powersem, established in 1985 and headquartered in Schwabach, Germany, is a manufacturer and supplier of power semiconductor modules for diverse applications. Its offerings encompass single and three-phase bridge rectifiers for AC to DC conversion, thyristor modules for current control in AC circuits, IGBT and MOSFET modules for power switching and amplification in DC circuits. These solutions cater to industrial drives, welding, battery chargers, renewable energy, and more. All products are UL Recognized Component Mark for product safety.
ZOWIE Technology Corporation was founded in 1994 as a manufacturer of semiconductor products in Taiwan. The company deals in Transistors, Transient Voltage Suppressors, and Rectifiers of various kinds like the Schottky Bridge, Schottky Barrier, Standard and Fast Recovery ones, and even High Thermal Performance Bridge Rectifiers. There are also Power devices and High Voltage products that have applications in the Automotive industry for ignition, headlights, power steering, fuel pump sensors, and more. Other industries that utilize ZOWIE products are LED Lighting, Mobile Phones, Electric Vehicle, PC and Digital cameras.
Sansha Electric Manufacturing Co.,Ltd. was founded in 1933 and is headquartered in Osaka, Japan. Sansha produces, sells, and installs electric, semiconductor and applied, and medical machinery and equipment in Japan and internationally. Sansha provides discrete semiconductor components such as fast and soft recovery diodes, power modules, rectifier diodes, Schottky barrier diodes, SIC MOSFET, thyristors, and TRIAC components. Sansha also offers electric power regulators, general-purpose rectifiers, grid connected inverters, industrial power supplies, power supply products for evaluation and light sources, uninterrupted power sources, and welding machines.
Dynex Semiconductor Ltd., founded in 1959 with headquarters in the UK, is a manufacturer of high-power bipolar capsule devices, IGBT modules, and power assemblies. The company's range of products includes IGBT modules with power cycling, bipolar thyristors, phase control thyristors, rectifier diodes, power assemblies used in hydrogen production, personal devices, railway maintenance, and numerous electronic devices used by the semiconductor, automotive, consumer electronics, healthcare, and telecommunication industries, among many more. Dynex Semiconductor Ltd. also offers customized production services that include consultation, design, engineering, and high-volume production.
Anshan Leadsun Electronics Co., Ltd. is an ISO 9001:2015 certified manufacturer of high-voltage electronic components, founded in 2001 and located in Anshan, Liaoning, China. They manufacture high-voltage diodes, rectifier blocks, bridge rectifiers, multipliers, and also power supplies. Their products are used to enable the transmission of high-voltage electrical signals and power between electronic devices, components, and systems, which are used in many applications such as lasers, X-rays, scientific research, industrial use, and safety inspection.
PANJIT was founded in 1986 in Taiwan as a manufacturer of semiconductors. Their product portfolio includes Power Management IC such as Flyback Controller/Active Bridge Controller for various circuit structures and applications. They also produce Low/Medium/High voltage MOSFETs and Schottky Rectifiers for improved power efficiency, low leakage of current, and stability. The SiC Devices are similar to third-generation semiconductors and there is also manufacturing of Diodes, Transistors, Bridges, and Protection Devices. These products are applicable in the Computing, Automotive, Communication, Consumer, and Power industries.
Murrelektronik, a manufacturer of industrial automation solutions, founded in 1974, and located in Murrhardt, Germany. The company specializes in manufacturing power supplies, interfaces, cables and connectors, and IO systems, utilized across diverse industries, including machine building, automation, packaging, and food processing. Their interfaces enable seamless device and system connections in industrial automation, featuring fieldbus, Ethernet, and serial interfaces. Providing secure and dependable connections, their cables and connectors encompass shielded, fiber optic, and various connector options. Murrelektronik is ISO 9001:2015 certified for its quality management system.
Solid State MFG is a semiconductor manufacturer based in New Jersey. Their product portfolio includes Rectifiers, Diodes, Triacs, Diacs, and IGBT (Insulated-Gate Bipolar Transistors) as different types of semiconductors. These products provide protection for various applications such as power supply, voltage clamping, and regulating the voltage flow in small circuits along with full-wave rectification. The Diodes are used as clamping devices for the protection of electronics against spike in voltage and the SCRs (Silicon-Controlled Rectifiers) function as lamp-dimming regulators and controllers of welding machines. The IGBT has uses in trains, air conditioners, stereo systems, and electric cars.
SEMIKRON Dafoss is a power electronics manufacturer formed by the 2022 combination of SEMIKRON and Danfoss Silicon Power. The goods include semiconductor components, power modules, stacks, and discrete systems, including chips, diones, and thyristors used in automotive, industrial, and renewable energy applications. Heatsinks, fans, and thermal interface materials are examples of accessories. The business operates production facilities with certifications like ISO 9001:2015, EMAS, and Letter of Conformity 2022 in Brazil, Germany, Italy, India, and the United States.
Voltage Multipliers (VMI), Inc., established in 1980 with headquarters in the USA, is a manufacturer of high-voltage semiconductor products. The company's product line includes high-voltage diodes, multipliers, rectifiers, optocouplers, and power supplies. Voltage Multipliers Inc.'s capabilities include in-house testing of diodes, rectifiers, multipliers, bridges, and power supplies. The company's products include X-ray power supplies, laser technology, oscilloscopes, military aircraft, and radar jamming equipment, among many others. Voltage Multipliers Inc. also provides custom product design and production.
WeEn Semiconductors Co., Ltd., established in 2015, and headquartered in Shanghai, China, is a manufacturer of bipolar power products. The company offers a diverse product portfolio, including Silicon Controlled Rectifiers utilized in power electronic circuits, Power Diodes for converting AC to DC, High Voltage Transistors for high voltage applications, Silicon Carbide Products suitable for high-temperature and high-voltage scenarios, and IGBTs and Modules commonly employed in high-power applications such as motor drives and power grids. The company has achieved certifications like IATF 16949, ISO 9001, and ISO 14001, ensuring quality and environmental standards.
Passive System Alliance Properity Dielectric Co. Ltd. is a passive component manufacturer established in 1990 and headquartered in Yang-Mei, TaoYuan, Taiwan. In 2005, the company entered into a strategic alliance with WTC, and in 2008, it formally merged with Hongdian Electronics, expanding its sales scope from dielectric ceramic powder, semiconducting ceramic capacitor tiles, multilayer ceramic capacitors, and chip resistors to inductors. The company is capable of meeting market demands by initiating material research and development and integrating and developing electronic components as required by customers.
Phoenix Contact is headquartered in Blomberg, Germany, originally founded in 1923. Phoenix Contact’s Israeli subsidiary was founded in 2006 and located in Quadima Tzoran. Phoenix Contact provides tools and components for e-mobility, power, infrastructure, process industry, production manufacturing, system manufacturing, and others. Phoenix Contact’s product lines include automate including cloud computing, connect including PCB terminal blocks, “mark, assemble, and install” including hand tools, “supply, charge, and protect” including power distributors, and “switch, measure, and monitor” including relays and optocouplers.
Kyocera Corporation was incorporated in 1946 in Kyoto, Japan as Kyoto Ceramics, but the name was later shortened to Kyocera. Kyocera is a multinational manufacturer and distributor of consumer products as well as industrial components including ceramic and electronic components used in the semiconductor, wireless communications, electronics, and wireless communications markets. Kyocera’s consumer products line includes smartphones and kitchenware such as ceramic knives, cookware, and drinkware. Ceramics are used in semiconductors, solar photovoltaic modules, as well as cutting tools. Kyocera’s electronics cameras, LCDs, medical products, and more.
Weidmüller is a manufacturer and distributor of electronic components and devices and a supplier of electronic solutions, that was established in 1850 in Germany. The company produces connectivity components and devices namely terminals, connectors, distribution boxes, and other products like cable entry systems and cables. In the Electronic solutions department, they design and supply relays, power supplies, housings, and modules. Their automation and software department consists of Controls & Edge, I/O systems, Industrial Ethernet, and Measuring & monitoring systems and these products and systems provide Energy management, Industrial IoT, Industrial Analytics, and Water & Wastewater Solutions to name a few.
Kingtronics International Company was established in 1990 in Hong Kong and has several factories across China manufacturing electronic components such as bridge rectifiers. The company is ISO 9001:2015 certified and works with several distributors around the world including KORE, Prod. El, DTDS, and others. The company produces two kinds of electronics components: passive components such as aluminum electrolytic capacitors including radial type and axial type, and active components such as diodes, transistors, and bridge rectifiers.
Ranking as of July 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Sensitron Semiconductor |
12.6%
|
| 2 | Powersem GmbH |
10.7%
|
| 3 | TDK-Lambda Corporation |
10.1%
|
| 4 | Mitsubishi Electric Corporation |
9.4%
|
| 5 | Dynex Semiconductor Ltd |
9.4%
|
| 6 | JEL SYSTEM CO,LTD. |
8.8%
|
| 7 | Coherent Corp. |
8.5%
|
| 8 | Newport Corporation |
6.3%
|
| 9 | ZOWIE Technology Corporation |
5.4%
|
| 10 | SANSHA ELECTRIC MANUFACTURING CO., LTD. |
4.7%
|
Derivation Method
The ranking is calculated based on the click share within the diode module 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 (%) |
|---|---|---|
|
Japan
|
7 | 38.9% |
|
United States of America
|
4 | 22.2% |
|
Germany
|
2 | 11.1% |
|
Taiwan
|
2 | 11.1% |
|
United Kingdom
|
1 | 5.6% |
|
China
|
1 | 5.6% |
|
Switzerland
|
1 | 5.6% |
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143 products
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