| American High Voltage: Precision AC/DC high voltage power supply modules for government and commercial applications. |
| Applied Kilovolts: Designs and produces power supplies primarily in the range from 1kV to 60kV. |
| Brandenburg HV Power Supplies: Manufacturer of standard and custom built high voltage power supplies. Some HV testing equipment. |
| Computer Power Supply, Inc.: Designs and manufactures high voltage power supplies, used for focused electron beam and focused ion beam applications. Online catalogue, pricing and data sheets. |
| Directed Energy, Inc.: High voltage pulse generators, pulsers, modulators and pulsed voltage sources |
| Diversified Technologies, Inc.: High voltage and high power solid-state switching power supplies, pulse modulators, and control systems |
| EGRA: Manufactures high voltage generators, capacitors and transformers for electrostatic painting, powder coating and flocking processes. |
| ELDEC Corporation: Designers and manufacturers of low voltage and high voltage power supplies for military and aerospace, CRT and AMLCD display applications. |
| EMCO High Voltage Corporation: Miniature DC to HV DC converters, multi-output, rack mount high voltage systems. Small HV power supplies. |
| Gamma High Voltage Research, Inc.: Designs and manufactures high voltage DC power supplies. Standard products range from miniature 1 watt, PCB mountable modules, to multi kilowatt, rack mountable assemblies. Voltage ratings range up to 500kVdc |
| Genvolt: Manufacturer of high voltage power supplies with output voltages starting from a few hundred volts and extending to 300kV, and power levels from a few watts to over 30kW. |
| Glassman High Voltage Inc.: Manufacturer of regulated high voltage dc power supplies. |
| Guiding Light Technology: DC input high voltage power supply modules. |
| Hitek Power: Supplies high voltage power supplies, EHT power supplies laser printer power supplies, ink jet printer power supplies and a range of other heavy duty power supplies. |
| Iseg High Voltage: Manufacturers of high voltage power supplies for industry and research applications. |
| Kaiser Systems, Inc.: Manufacturer of capacitor chargers, DC high voltage power supplies, X-ray supplies, laser diode drivers, custom design and off-the-shelf systems. |
| Keltron High Voltage Power Supplies: Manufacturer of high voltage OEM Power Supplies for a range of applications. |
| Matsusada Precision Inc.: High voltage power supplies. Integrated HVPS and X-ray tube. |
| Meerstetter Engineering, GmbH: Designer, developer and manufacturer of power electronics, laser power supplies, and high voltage transformers. |
| Physique and industrie: High voltage, high power, solid-state pulse generator, designed for plasma ion implantation or plasma lasers. |
| Polarity Inc.: Designs and fabricates high power products including industrial high voltage power supplies, solid state RF amplifiers, ultra low noise TWT, CFA, and Klystron microwave amplifier systems. |
| Spellman High Voltage: Designs and manufactures high voltage power supplies up to 500kV and 150kW. Brands include Bertan and Del. |
| Technix: Manufacturers of high voltage DC power supplies to provide national laboratories, technical institutes, universities and industry. |
| UltraVolt, Inc.: Manufacturer of off-the-shelf modular and rack mount programmable DC to DC high voltage power supplies, from 62V through 40kV and 4 Watts to 250 Watts. |
| Universal Voltronics: Designs and manufactures high voltage DC power supplies, specializing in high power (over 1kW) and high voltage (over 1kV) applications. |
| Virtual Technologies, Ltd.: Designs and manufactures customized AC-DC and DC-DC power supplies, from 500V to 120kV and up to 10kW in power. |
| Xcel Power Systems: Manufacturers of custom low voltage and high voltage power supplies primarily for military, aerospace and transport markets. |
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