Companies making high voltage rectifiers for ev chargers
Electric vehicle (EV) fast chargers require powerful AC-to-DC rectifiers to convert grid electricity into the high-voltage direct current needed to recharge batteries. In essence, a rectifier takes the alternating current (AC) from the power grid and converts it to direct current (DC) that an EV battery can accept. These high-voltage rectifiers are the heart of DC fast charging stations, delivering hundreds of volts (up to 800–1000 V or more) at high power levels to quickly charge modern EVs. By handling this conversion efficiently and reliably, rectifiers enable the rapid charging times that drivers increasingly expect.
Growing Demand for Efficient DC Fast Charging
The push for faster, higher-power charging is stronger than ever. With EV adoption on the rise and governments setting aggressive zero-emission targets, more efficient and powerful charging solutions are needed to support drivers and encourage EV uptake.
Studies show that the convenience of charging – both the availability of chargers and the time it takes to charge – is critical to consumer acceptance of electric vehicles.
Today’s high-power DC fast chargers can already refill about 80% of an EV’s battery in under 10 minutes, nearly rivaling the experience of fueling a gasoline car.
Achieving such performance requires advanced rectifier technology to convert large amounts of power with minimal losses. Equally important is maintaining high reliability – drivers want chargers that are operational and “ready to go” whenever they pull up. This demand for fast, convenient, and dependable charging is driving innovation among rectifier manufacturers and power electronics providers.
Here is the list of companies that are manufacturing high voltage rectifiers for ev chargers globally.
▶️ OmniOn Power – Modular 30 kW Rectifiers for Fast Chargers
OmniOn Power’s 30 kW EV charger rectifier module (EV100/EV101 series) is a 19-inch rack unit designed for high-power DC fast charging.
OmniOn Power is a newer entrant focusing on plug-and-play rectifier modules for EV charging. Their EV100H3NK and EV101H3N1K AC/DC rectifiers each provide 30 kW DC output with up to 96% efficiency and an adjustable 50–1,000 VDC output range.
This wide voltage span means a single module can service both standard ~400 V EV battery packs and newer 800 V packs (which require up to ~1000 V DC), making it suitable for both 400 V and 1,000 V-class powertrains. The modules use a 480 V three-phase AC input and integrate automotive CAN communication for control.
Multiple units can be combined for higher power needs – up to 12 rectifiers in parallel – scaling a system to ~360 kW for ultra-fast charging stations.
This modular approach not only increases total charging capacity but also improves uptime: if one module needs service, it can be swapped out without taking the entire charger offline. Notably, the EV101H3N1K variant includes an emergency power-off circuit for safety, meeting strict regional requirements for rapid shutdown in emergencies.
OmniOn’s modular rectifiers illustrate how high-voltage, high-efficiency building blocks can be used to assemble reliable fast chargers quickly and flexibly.
▶️ C&H Technology, Inc. – High-Current/High-Voltage Industrial Rectifiers
C&H Technology specializes in high-current, high-voltage industrial rectifiers that find use in many heavy-duty applications, including EV charging. Their product range spans devices rated from 10 A up to 10,000 A and from 100 V up to 4,500 V.
In practice, this means they offer everything from relatively small rectifier diodes to massive diode and thyristor assemblies for multi-megawatt systems. Typical uses include welding equipment, battery chargers, electric motor drives, and traction/transportation power systems
– all of which overlap with the needs of EV infrastructure (for example, high-power battery chargers for electric buses or trucks).
C&H is known as a distributor and integrator of power semiconductors from major manufacturers (diodes, thyristors, IGBTs, etc.), assembling them into rectifier stacks and bridges.
Their designs emphasize robust construction and compliance with industry standards. In fact, C&H’s rectifier products are 100% lead-free and RoHS compliant, and many are UL-recognized, ensuring they meet safety and environmental regulations for worldwide use.
By supplying the critical high-current diodes, thyristors, and bridge rectifier assemblies needed to build reliable chargers, C&H Technology plays a behind-the-scenes role in the EV charging ecosystem.
▶️ Marsh Electronics, Inc. – Rectifier Components for EV Chargers and UPS
Marsh Electronics is an electronics distributor that provides a broad range of power rectifier components used in EV charging systems and other power conversion equipment. They offer everything from fast-recovery and Schottky diodes to single-phase and three-phase bridge rectifiers and silicon-controlled rectifiers (SCRs) (thyristor-based rectifiers).
In other words, Marsh can supply the individual “building blocks” – whether a high-current diode or a packaged bridge module – that go into an EV charger’s rectifier stage. These products come from leading manufacturers (Marsh acts as a channel partner) and are selected for high performance and reliability. Applications span EV battery chargers, uninterruptible power supplies (UPS), industrial power supplies, welding systems, and more.
For example, an EV fast charging station might use Marsh-supplied three-phase bridge rectifiers and filter capacitors in its front-end to convert AC to DC, or a UPS system might use Marsh’s SCR rectifiers for its battery charging circuit.
By providing engineering support and sourcing of high-quality rectifier components, Marsh Electronics helps charger manufacturers and integrators build dependable high-voltage DC power systems. Their involvement ensures that EV charger designers have easy access to proven diodes, bridges, and related components needed to handle high currents and voltages in charging applications.
▶️ Infineon Technologies – Power Semiconductors for Chargers up to 150 kW
Infineon is a market leader in the power semiconductor arena, and it offers a comprehensive portfolio of high-voltage devices that enable efficient EV charging. For fast charger designs in the 30 kW to 150 kW range (common for modern DC fast chargers), Infineon provides many of the key components.
These include their CoolMOS™ family of high-voltage superjunction MOSFETs (for example, 600 V and 650 V transistors) and their latest TRENCHSTOP™ IGBT7 series (insulated-gate bipolar transistors) for the 650 V–1200 V range. In addition, Infineon’s CoolSiC™ MOSFETs (silicon carbide-based power transistors in 650 V, 750 V, and 1200 V classes) enable extremely high efficiency at high switching frequencies– a valuable trait for maximizing efficiency in EV chargers. To handle the rectification and freewheeling needs, Infineon also produces SiC Schottky diodes (CoolSiC™ Schottky diodes at 650 V and 1200 V) that offer virtually zero reverse-recovery loss.
By using a combination of these devices, charger designers can implement efficient power factor correction (PFC) and DC/DC converter stages that minimize heat and meet strict efficiency standards. Beyond just discrete components, Infineon distinguishes itself with integrated solutions for EV charging systems – they supply the supporting circuitry and chipsets that tie the power stage together.
For instance, Infineon’s lineup includes isolated gate driver ICs (EiceDRIVER™) for safely driving the transistors, as well as XMC™ and AURIX™ microcontrollers to control the charger’s operation and manage communication.
They even offer connectivity and security chips for features like wireless communication and payment security in charging stations.
This one-stop-shop approach means an EV charger manufacturer can source a large portion of the charger’s “brain and muscle” from Infineon – obtaining well-matched components that have been designed to work together. Infineon’s power semiconductors and reference designs have been instrumental in pushing charger efficiencies toward 95–98% and enabling high-power chargers (50 kW, 150 kW and beyond) with confidence in reliability. As charging networks expand, Infineon’s innovations in Si, SiC, and GaN (gallium nitride) devices will continue to drive improvements in charger size, efficiency and cost.
▶️ Rectifier Technologies – High-Efficiency Modules for EV Charging
Rectifier Technologies’ RT22 50 kW EV charger rectifier module, which provides DC output from 50 V up to 1000 V for fast-charging any EV battery pack.
Australia-based Rectifier Technologies has carved out a niche in developing power conversion hardware tailored specifically for EV charging infrastructure. The company specializes in high-efficiency rectifier modules and power systems with a strong emphasis on reliability.
One of their flagship offerings is the RT22 50 kW EV Charger Module, a 50 kW AC-DC converter unit designed for three-phase input. The RT22 delivers an adjustable output from about 50 V up to 1000 V DC, allowing it to charge essentially any EV battery system (from low-voltage EVs to 800 V architectures).
Notably, the module achieves a peak efficiency over 96%, which helps minimize wasted energy and heat. Rectifier Technologies has engineered these units for plug-and-play scalability: they are hot-swappable and can be connected in parallel to scale a charger’s power.
In fact, the 50 kW modules can be combined to build chargers of 500 kW or more total output, suitable for the highest-demand charging stations. The modules include advanced features like reactive power control (to stabilize the grid while charging) and can operate without forced-air cooling if needed (for noise-sensitive installations).
By focusing on modular design, high reliability (zero-downtime architecture), and top-tier efficiency, Rectifier Technologies has become a key supplier of the “power bricks” inside DC fast chargers. Their solutions are used in public charging stations and industrial EV charging systems worldwide.
This specialization – focusing exclusively on the needs of EV charging – means their rectifiers are built to handle wide output ranges and variable loads, communicate with EV charge controllers, and meet regulatory requirements (they are a member of CharIN, the industry’s charging standards consortium). In summary, Rectifier Technologies’ contribution is in providing ready-made high-voltage rectifier modules that charger manufacturers can integrate to speed up development and ensure dependable performance in the field.
▶️ Neeltran, Inc. – High-Power Custom Rectifiers for Extreme Applications
Neeltran is a U.S.-based manufacturer known for large-scale, high-power rectifier systems and transformers. In the context of EV charging, Neeltran’s capabilities are at the very high end – think of the kind of rectifiers needed for electric fleet depots, bus charging stations, or other heavy-duty charging infrastructure that might require megawatt-level power. Neeltran offers air-cooled and water-cooled rectifier assemblies that can handle enormous currents and voltages; for example, they produce rectifiers rated from 1,000 A up to 50,000 A (50 kA) DC per unit, with output voltages up to 2,500 V DC.
These are often integrated with Neeltran’s custom-built transformers to create complete high-power DC supplies (sometimes called rectiformers). The systems can be designed in multi-pulse configurations (12-pulse, 24-pulse, etc.) to meet stringent power quality requirements, which can be important when drawing such large power from the grid. Key features of Neeltran’s rectifiers include scalable design and remote monitoring/control – they build in modern microprocessor-based control boards that allow the rectifier to be monitored, and even operated, from a control center.
These units are typically custom-engineered for each project, ensuring they meet specific technical and safety standards (ANSI, NEMA, IEC, etc.) for the environment they will operate in. While Neeltran’s traditional markets have been industrial (steel mills, chemical processing, mining, etc.), the electrification of transportation is emerging as a new opportunity.
High-power charging of electric trucks or buses, for instance, might demand a centralized 1 MW charging system – something Neeltran is well positioned to supply with its experience in high-current DC power supplies.
In enabling such large-scale EV charging installations, Neeltran’s heavy-duty rectifiers serve as the backbone that can deliver reliable DC power at the required scale. Their involvement underscores that as EV charging needs grow in power, industry expertise from traditional high-power sectors is being applied to meet those challenges.
Enabling High-Power Charging Infrastructure
The contributions of these manufacturers – from modular 30 kW bricks to 50 kA giant rectifiers – are collectively driving the evolution of EV charging infrastructure. High-voltage rectifiers are a linchpin technology that directly affects how fast and how reliably an EV can charge. Advances by companies like those profiled above mean today’s charging stations can be built with greater power and redundancy, ensuring that drivers have a quick and seamless charging experience. By using highly reliable, high-capacity rectifier modules as the building blocks of charging stations, providers can address two major challenges to EV adoption: charging time and charger availability.
Efficient rectifiers shorten charging times by allowing more power to reach the battery with less loss as heat. At the same time, the reliability and maintainability of modern rectifier systems (for example, hot-swappable modules or robust industrial designs) keep charging stations up and running whenever drivers arrive.
The high efficiencies (often 95–97%+) of today’s rectifiers also help minimize strain on the electrical grid and reduce operational costs, which is crucial as hundreds or thousands of fast chargers are deployed. Moreover, the scalability afforded by modular rectifiers means infrastructure can be expanded in step with EV adoption – adding more modules to a station to boost power, or upgrading components as technology improves.
Together, these innovations enable the roll-out of high-power charging stations along highways and in cities, paving the way for convenient long-distance EV travel and the electrification of fleets. In short, the continual improvements in rectifier technology by these key manufacturers are empowering the next generation of EV charging networks around the world.
Towards the end…
High-voltage rectifiers might be hidden inside charger cabinets, but they are absolutely fundamental to the future of electric mobility. They convert and control the flow of electricity that ultimately fuels our cars, buses, and trucks.
As we have seen, companies like OmniOn Power, C&H Technology, Marsh Electronics, Infineon, Rectifier Technologies, and Neeltran are providing the expertise and products to meet the demanding requirements of EV charging. Each brings a different specialization – whether it’s cutting-edge semiconductor devices, turnkey industrial power supplies, or plug-and-play charging modules – and together they are raising the bar for what charging systems can do.
The importance of high-voltage rectifiers will only grow as EV adoption accelerates. Future fast chargers may need to deliver even higher power (to charge larger batteries in minutes) or manage more complex tasks like vehicle-to-grid power feedback; these challenges will rely on further innovations in rectifier and power conversion technology. In the coming years, we can expect high-voltage rectifiers to become more efficient, more compact, and smarter, enabling widespread deployment of ultra-fast chargers without overloading grids or sacrificing reliability. By ensuring that electricity from any source – whether the grid or renewable energy – can be efficiently converted into battery-ready DC power, high-voltage rectifiers and their manufacturers are truly driving the EV revolution.
They are the unsung heroes inside every rapid charger, quietly but critically charging up the batteries that move the world toward greener transportation.
