Endicott Coil Company, Inc. - Since 1954Endicott Coil is an ISO 9001:2015Certified Manufacturer Specializing inCustom Wound Electric Coils, Encapsulated Coils and Custom Transformers

Vacuum Impregnating of Wound-Copper Coils for the Electronics Industry

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Vacuum Impregnating of Wound-Copper Coils for the Electronics Industry
Vacuum Impregnating of Wound-Copper Coils for the Electronics Industry

Endicott Coil Company, Inc. produced these vacuum impregnated wound copper coils for a customer in the electronics industry. Because this process requires no tooling, it is a cost-effective alternative to molding or encapsulating. We placed the wound copper coils in a vacuum pressure impregnation tank, which removes the air and replaces it with a varnish or epoxy impregnant. We matched the resin to customer requirements for a variety of properties, such as chemical resistance, moisture resistance and dielectric characteristics. The process also required curing the pieces in a temperature controlled oven.

These coils were subject to a stringent, ISO-certified quality processes that included gage dimensioning as well as Hipot and surge testing. Produced to tolerances of ±0.005", the coils are approved to UL, CSA (Canada) and VDE (Germany) standards. To learn more about this project or how our vacuum impregnated wound copper coils can improve your next project, contact us today.

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Highlights of Vacuum Impregnating Wound-Copper Coil Project

Product Description   These Coils are Vacuum Impregnated to Guard the Coil from Environmental Conditions
Vacuum Impregnation Capabilities Applied/Processes  
  • Design/Product Development
  • >Vacuum Impregnating
  • Baking
  • Spray Painting
  • Sanding
  • Dip Varnishing
Equipment Used to Manufacture Part  
  • VPI Tanks - Both Heated and Non-Heated
  • Temperature Controlled Baking Ovens
Overall Part Dimensions   2.734" Length x Ø 2.375" Diameter
Tightest Tolerances   ± 0.005"
Material Used  
  • Viking: C1525A, V1630FS, C1525F35
  • John C. Dolph: AC-41, AC-43, BC-346, EB-41,CC-1118, BC-352
  • Dow Corning: 997 Varnish
  • P. D. George: 434-CC
In process testing/inspection performed  
  • Dimensional Gage Test
  • Shorted Turns Test
  • Hipot Test
  • Surge Test
Industry for Use  
  • Marine
  • Automotive
  • Transportation
  • Electronics
Standards Met  
  • Customer Specifications
  • 2D CAD Drawing
  • VDE
Product Name   Impregnated Coils

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