A recognized world leader in the design and manufacture of transformers, inductors, power supplies and related magnetic components. Established in 1937, Foster Transformer Company is also one of the oldest transformer manufacturers. We have over 16,000 designs in our database and more than 200 designs that are UL and C-UL Listed or Recognized. We also have a selection of transformers certified to international safety standards. We offer a broad selection of standard designs ranging from small printed circuit board mounted parts to 5.0 kVA Medical Grade Isolation Transformers. These designs can be readily customized to meet specific applications. Foster also specializes in the design of custom magnetics with parts ranging from less than one ounce to more than 350 pounds. Occupying the same location for more than 70 years, Foster maintains documentation on all of its designs so you will never hear "Sorry, we don't make that anymore..." We also have a joint venture in Asia assuring we can deliver the parts you need at a competitive cost.