What We Do Ametherm, established in 1994, manufactures rugged Inrush Current Limiting Thermistors also known as Power Thermistors. Manufacturing Our manufacturing plant located in Carson City, Nevada USA is equipped to pr......What We Do Ametherm, established in 1994, manufactures rugged Inrush Current Limiting Thermistors also known as Power Thermistors. Manufacturing Our manufacturing plant located in Carson City, Nevada USA is equipped to process raw materials such as manganese, copper, cobalt and, nickel into the substrate materials that protect power supplies, AC motors, and audio amplifiers all over the world. Quality Ametherm is ISO9000:2001 certified. Our facility uses Lean manufacturing techniques that allow us to keep lead times low and our selection of products high. Purpose Our inrush current limiters are known across the globe for their performance and durability. Ametherm makes the highest rated inrush current limiters in the world.