| AAK Corporation | | Manufacturer of DC power supplies, DC/AC and AC/AC converters, constant current sources, and similar products. |
| AC Power Corp. | | Manufacturer of automatic voltage regulator, UPS , AC power source, frequency converter and power line conditioners. |
| Acopian Power Supplies | | Manufacturer of single, dual, triple and wide adjust output AC-DC power supplies, DC-DC converters, high voltage power supplies, power systems, and redundant power packages. |
| AEES | | Full range of thyristor chargers, switch mode rectifiers, inverters, dc-dc converters, UPS single and 3 phases up to 40 kVA, voltage stabilizers up to 700 kVA. |
| Amtex Electronics | | Manufacturer of AC/DC power supplies, DC/DC converters, power inverters and battery chargers. |
| Analytic Systems | | Manufacturer of AC and DC power supplies, DC to AC inverters, DC to DC voltage converters, and battery chargers for multiple applications. |
| Arnatronic Plus | | Manufacturer of standard and custom stabilized DC and AC power supplies, battery chargers, converters, and specialized function cards. |
| Ascom Energy Systems | | Custom designed AC/DC, DC/DC converters, inverters, power supplies, and power systems. |
| Ault Korea Corporation | | Manufacturer of SMPS, DC-DC converter, AC-DC adapter, linear transformer, battery charger for medical equipment. |
| Behlman Electronics | | Manufacturer of AC and DC power supplies, inverters, converters, UPSs and line conditioners. |
| Bellus Power | | Supplier of a wide range of power supplies including : open frame power supplies, wall mount adapters, enclosed power supplies, DC/DC Converters. Feature include: switch mode, linear, universal input, power factor correction, PFC. |
| Benbro Electronics, Inc. | | Design and manufacture electronic equipment including commercial public address amplifiers, power supplies and DC/DC converters. Online line card and product specifications. |
| Beta Dyne Inc | | Power converters and inverters, DC/DC converters, isolation-amplifiers. Application areas include telecom, computer and instrumentation. |
| Block GmbH | | Manufacture of transformers, chokes, power supplies and EMC filters for industrial machinery, telecommunication, computer, medical systems. US Office. |
| Blue Iron | | Manufacturers of AC/DC adapters, regular adapters, CCEE linear adapters and switching mode adapters. |
|
|
