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Advanced Material Solutions for Power Electronics

At Wm. F. McGraw & Co., in Riverview, MI, we create engineered material solutions that afford the ever-changing needs of power electronics. Our specialty materials are used within systems that require high performance due to electrical, thermal, and mechanical stress. We help mitigate risk and increase product longevity through careful consideration of material choice.

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Material Solutions for Power Electronics

Our advanced materials are designed for complex insulation, thermal management, and structure for demanding power electronics systems. We make high-performance components from a wide variety of engineered materials suited for meeting specific application needs across power conversion, storage, and distribution.

Dielectric barriers: Our dielectric barriers insulate high-voltage components and include these barriers made with strong laminated composites. Our dielectric barriers are dielectric and are unaffected by the potential for electrical leakage. The structural and dielectric properties of the barriers withstand high temperatures and mechanical stress. Our dielectric barriers are intended and tested for especially important applications.

Structural supports: Our structural components are reinforced composites that act as rigid, nonconductive barriers for high-voltage part mounting and spacing. CNC machining ensures the dimensional precision and long-term mechanical performance to minimize misalignment of electrical components and failure in the power system.

Thermal management components: We provide thermally conductive composites that electrically isolate heat from sensitive modules. Thermal management is critical in prolonging product life and maintaining performance consistency by managing heat accumulation around densely packed assemblies.

Thermoplastic Materials

Insulating films: Our high-dielectric thermoplastic films provide insulation across conductive paths such as those seen in traces and busbars. Our flexible, thin films can mold into tight assemblies and are ideal when protecting conductive paths where both assembly size and reliability are essential.

Protective housings: Our protective housings are machined from high-performance thermoplastics that provide electrical insulation, structural containment, and fire resistance. These housings are designed to protect an internal assembly while enhancing the integration into the enclosure of your system.

Wm. F. McGraw & Co.

We specialize in the fabrication of mold and platen insulation for the plastic injection and rubber molding industries
About Us

Key Applications in Power Electronics

Wm. F. McGraw & Co. is an engineering materials supplier with engineered material solutions that assist in performance, safety, and efficiency in essential power electronics functions.

Power Conversion Systems

Components:

  • Inverters: Inverters allow direct current (DC) alternating current (AC) to interface with most electrical systems. Our insulating material and thermal control materials guarantee the performance of its inverters at high switching frequencies while maintaining electrical isolation, in addition to thermal and heat dispersion properties.
  • Converters: Converters change the voltage of electrical power. They are critical components to match power for different equipment or electrical systems.  We have dielectric barriers and rigid structural supports to minimize energy losses and support stable operation and load shifts from different cyclical loads across multiple applications.
  • Rectifiers: Rectifiers are a device that performs he reverse, taking AC and converting it to DC, one of the steps in many batteries and signal processing components. We have flame retardant composites and thermal materials that can protect the rectifier circuits to prevent overheating and electrical shorts for greater performance under continuous duty applications.

Data Center

Components:

  • Uninterruptible Power Supplies (UPS): UPS allows electrical devices with a direct source of electrical power to continue running when the source loses power, until after a fixed time when a backup system kicks in to provide electrical power. Our materials increase the reliability of the UPS as our dielectric insulation and thermal materials can provide uninterrupted operations with error margins to reduce the point of failure during sudden changes in loads out of the load range previously imposed on the UPS system. 
  • Power Distribution Units (PDUs): PDUs distribute and manage electrical power inside a data center’s racks.  Our high-performance insulation and structural components maintain performance standards when housed in tightly secured environments under thermal loads to support electrical flow to energize all components to enable appropriate operation without operational issues.
  • Surge Protective Devices: A surge protective device redirects harmful voltage spikes and protects sensitive equipment. Our flame-retardant composites and dielectric barriers increase surge protection by isolating and containing fault energy to prevent system-wide damage and data loss. 

Renewable Energy Applications

Components:

  • Battery Management Systems: Battery systems require accurate control and protection. Our materials support electrical isolation and mechanical protection of critical management modules and help to ensure that batteries operate safely despite extremely demanding charge/discharge cycles. 
  • Capacitor Insulation: Capacitors store and release electrical energy very quickly. We provide insulating materials that have excellent dielectric strength to prevent energy losses and breakdown while allowing capacitors to operate safely in high-voltage, high-frequency environments. 
  • Thermal Interface Materials: Heat build-up undermines system reliability. Our thermal interface materials are designed to fill in contact imperfections and air gaps between surfaces, maximizing heat flow away from sensitive components without sacrificing electrical insulation or mechanical stability.

Renewable Energy Applications

Components

  • Solar Inverters: Solar inverters convert the variable DC output from solar panels into usable AC. These units experience fluctuating loads and are exposed to extreme environmental factors. Our engineered insulation materials provide thermal resistance, dielectric protection, and environmental durability for long-term outdoor performance that helps guarantee system integrity. 
  • Wind Turbine Converters: Wind turbine converters manage electrical energy from the wind turbine generator and convert it for grid compatibility. Our composite and thermoplastic insulation components are engineered to withstand harsh climatic conditions, high vibration, and temperature swings so that critical electronic levels can operate more fully protected and mechanically protected. 
  • Charge Controllers: Charge Controllers control the utilization of power from renewable sources to be stored in the energy storage systems. Our materials can help mitigate failures related to thermal and electrical overload by offering high voltage dielectric strength, cut barriers to specification, and flame-retardant characteristics, saving the circuits themselves, limiting environmental stress, and protecting against electrical and retrogression overload mechanisms.

Specialized Material Features

We understand that power electronics need materials that go beyond simple insulation. That’s why our portfolio focuses on targeted performance features designed to boost reliability, enhance safety, and support demanding system requirements.

  • Dielectric Protection:
     Our high-dielectric strength materials provide robust electrical insulation for components operating under extreme voltages. Whether used to isolate busbars, power rails, or conductors, these materials help mitigate leakage currents, reduce the risk of arc flash, and extend the service life of electrical assemblies. With dimensional stability under thermal and mechanical stress, they maintain performance even in high-load or high-frequency environments.
  • Thermal Management:
     Excess heat can severely impact the efficiency and reliability of power electronics. That’s why our materials are engineered for optimal thermal conductivity without compromising electrical insulation. From thermally conductive pads to composite laminates, our offerings move heat away from sensitive modules, reducing the chance of overheating, minimizing failure rates, and improving operational uptime. These solutions are ideal for compact or densely packed assemblies where passive cooling is limited.
  • Flame Retardancy:
     Safety and compliance are non-negotiable. Our flame retardant materials meet UL 94 V-0 standards, making them ideal for use in enclosures, cable systems, and power control units. These materials resist ignition, limit flame spread, and reduce smoke generation, adding another layer of safety in high-risk or heat-prone environments. From thermoplastics to composite panels, our solutions help manufacturers meet strict regulatory and operational standards while maintaining design flexibility.

Support Services

Components

  • Solar Inverters: Solar inverters convert the variable DC output from solar panels into usable AC. These units experience fluctuating loads and are exposed to extreme environmental factors. Our engineered insulation materials provide thermal resistance, dielectric protection, and environmental durability for long-term outdoor performance that helps guarantee system integrity. 
  • Wind Turbine Converters: Wind turbine converters manage electrical energy from the wind turbine generator and convert it for grid compatibility. Our composite and thermoplastic insulation components are engineered to withstand harsh climatic conditions, high vibration, and temperature swings so that critical electronic levels can operate more fully protected and mechanically protected. 
  • Charge Controllers: Charge Controllers control the utilization of power from renewable sources to be stored in the energy storage systems. Our materials can help mitigate failures related to thermal and electrical overload by offering high voltage dielectric strength, cut barriers to specification, and flame-retardant characteristics, saving the circuits themselves, limiting environmental stress, and protecting against electrical and retrogression overload mechanisms.

Industries Served

Our solutions are trusted across high-demand industries where reliability, safety, and performance matter most.

  • Renewable Energy: We provide durable, weather-resistant insulation materials designed for solar and wind energy systems. These components ensure safe operation in outdoor environments by maintaining dielectric strength, thermal stability, and structural integrity over long operating periods.
  • Data Centers: Our materials are essential to uninterrupted operations in data environments. From insulating UPS modules to thermal control in PDUs, we help protect critical infrastructure from power surges, thermal stress, and component failure.
  • Industrial Automation: In automated manufacturing, machinery faces extreme loads and continuous motion. Our flame-retardant, mechanically strong insulators ensure safety and system uptime in control panels, sensors, and drive systems.
  • Transportation: Electric vehicles, locomotives, and heavy machinery require high-performance insulation that withstands mechanical vibration and heat. We deliver robust solutions that improve durability and safety under tough mobile conditions.
  • Aerospace: Lightweight composites and precision insulation are vital for avionics and propulsion. Our materials meet aerospace-grade standards, offering fire resistance and reliable insulation for demanding airborne systems..

Let's Connect

Looking for material solutions that improve your power electronics systems? Reach out to Wm. F. McGraw & Co. in Riverview, MI, to learn more or request a custom quote. We’re ready to help you find the right answer for your application.

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