Infineon CoolMOS power MOSFETs: efficient chips for modern energy systems

Infineon CoolMOS power MOSFETs help make chargers, servers, solar inverters and EV systems more efficient, supporting lower energy use and cooler-running electronics for US homes and businesses.

Infineon CoolMOS power MOSFETs are high-voltage transistors designed to boost efficiency in power supplies, chargers, servers, solar inverters and many other electronic systems for homes, businesses and industry.

Infineon CoolMOS power MOSFETs are a family of superjunction metal-oxide-semiconductor field-effect transistors aimed at high-voltage switching applications in power electronics, according to Infineon product documentation Infineon, May 2025. They are widely used in applications such as switch-mode power supplies, adapters, LED drivers and industrial power systems Infineon, March 2025.

Updated: May 21, 2026 | Reading time: approx. 9 minutes

By the AD HOC NEWS editorial team - specialized in product-focused market coverage.

At a Glance

• Product: Infineon CoolMOS power MOSFETs
• Category: High-voltage power MOSFET semiconductor devices
• Brand/Manufacturer: Infineon Technologies
• Key Use Cases: Power supplies, chargers, data centers, solar, EV charging
• Availability: Sold globally via distributors and OEM channels
• Core Markets: Consumer electronics, industrial, automotive, renewable energy

What Infineon CoolMOS power MOSFETs Is and How It Works

Infineon CoolMOS power MOSFETs are superjunction devices engineered to handle high voltages - often in the 600 to 900 volt range - while keeping switching losses low. In plain terms, they act like ultra-fast, electronically controlled switches for directing power inside electronic equipment.

In a typical switch-mode power supply, AC power from the wall is converted to DC through a sequence of stages. CoolMOS devices sit in the high-voltage section and rapidly switch on and off at high frequencies, shaping the flow of energy into the transformer and downstream circuitry Infineon, January 2025. Their design aims to minimize the energy lost as heat during this process.

The superjunction structure inside CoolMOS devices differs from conventional planar MOSFETs. It uses carefully arranged charge-balanced regions in the silicon to tolerate higher voltages while maintaining low on-resistance. Lower resistance translates into lower conduction losses whenever the device is in the on state, which is critical in high-power designs like servers or industrial drives.

Infineon offers CoolMOS products in multiple series optimized for different priorities, such as ultra-low switching losses, robustness for harsh industrial environments, or cost-effective performance for mass-market chargers and adapters Infineon, September 2024. Designers can choose packages ranging from through-hole TO-220 styles to surface-mount DPAK and power packages for compact layouts.

From a system perspective, CoolMOS devices help reduce the overall size of power supplies. When switching losses are lower, engineers can operate at higher frequencies with smaller magnetics and capacitors. This design freedom supports slimmer laptop chargers, more compact TV power boards and denser power shelves in data centers, which is particularly relevant for space-constrained US server racks.

Why Infineon CoolMOS power MOSFETs Matters for Consumers and Industry

For US consumers, CoolMOS-based designs are often hidden inside daily electronics. Many USB-C laptop chargers, gaming consoles, smart TVs and appliance power bricks rely on high-voltage MOSFETs similar to CoolMOS to deliver stable power while keeping heat and energy use under control. Better efficiency can support lower electricity consumption over the lifetime of these devices, which matters for household budgets.

In data centers, power losses translate directly into operating expenses and cooling costs. Industry analysis has emphasized that even small efficiency gains in server power supplies can result in substantial energy savings when multiplied across large hyperscale facilities IEEE, June 2024. CoolMOS devices are targeted at server and telecom power architectures where every fraction of a percentage point in efficiency counts.

Renewable energy systems across the US, including residential and commercial solar inverters, also benefit from efficient high-voltage switching components. Power MOSFETs in the CoolMOS family support topologies used in string inverters and hybrid systems, helping convert DC from solar panels into AC with minimal losses Infineon, February 2025. Higher conversion efficiency means more usable energy from each installed panel.

Infineon CoolMOS power MOSFETs in the US and Global Market

Infineon is one of several major suppliers of power MOSFETs for global markets, alongside competitors such as STMicroelectronics and ON Semiconductor, all serving data center, industrial, automotive and consumer sectors Bloomberg, November 05, 2024. CoolMOS products form a key part of Infineon’s high-voltage offering used by OEMs and power supply makers worldwide.

In the United States, CoolMOS components are distributed through major electronics distributors and online platforms that supply design engineers, contract manufacturers and repair specialists. They are commonly selected for designs that must meet US energy-efficiency programs and voluntary standards in consumer and IT equipment, such as ENERGY STAR criteria for power supplies ENERGY STAR, July 2024.

Across global markets, demand for efficient power semiconductors has been supported by growth in electric vehicles, solar installations, heat pumps and AI-centric data centers. While higher-power silicon carbide and gallium nitride devices are gaining prominence, superjunction MOSFETs like CoolMOS remain a backbone technology in many mid-power and high-volume applications where cost-efficient, reliable performance is required.

• High-voltage CoolMOS MOSFETs target efficient power conversion in consumer, industrial and renewable systems.
• US data centers, solar inverters and electronics manufacturers rely on such devices to meet efficiency and thermal targets.
• CoolMOS competes alongside other power semiconductor technologies, including silicon carbide and gallium nitride, in evolving power architectures.

Infineon Technologies AG is the company behind the CoolMOS power MOSFET product family and supplies a broad portfolio of power semiconductors for automotive, industrial and consumer applications worldwide.

Infineon Technologies shares are listed on the Frankfurt Stock Exchange and form part of the DAX index; the company’s stock carries the ISIN DE0006231004.

Disclaimer: This article does not constitute investment advice. Stocks are volatile financial instruments.