Specializing in Inrush Current Limiting Thermistors for the Power Market Industry

Ametherm, Inc. - bigAMP Inrush Current LimitersAmetherm, founded in 1994 and ISO 9000:2001certified, focuses on manufacturing inrush current limiting thermistors for the power market industry. Ametherm’s products are some of the highest rated in the industry and provide the widest range of output protection available, supporting outputs from 50 to 7,500 watts and continuous currents from .25 to 50 amps.

With a focus on high quality and durability, Ametherm’s products are found in applications including motor drives, soft start circuits, HVAC, switch mode power supplies, audio amplifiers, and medical X-ray equipment.

Ametherm's US based manufacturing plant, located in Carson City, Nevada, is equipped to process raw materials such as manganese, copper, cobalt and, nickel into the substrate materials that protect power supplies. The plant uses Lean manufacturing techniques for fast lead times and a wide selection, and its products are distributed worldwide.  

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Case Study: Inrush Current In Transformers (Surge Suppressors) Suppose we have a 2.0KVA transformer with the following specifications: Peak Inrush Current occurs in one cycle = 564 Amps as measured on the scope. Practical Max Inrush Current occurs in 5 cycles =... (View Full Article)
Protecting Switching Power Supplies from Inrush Current (Circuit Protection Devices) This application note provides some design considerations for inrush current protection of the AC current applicable to Switching Power Supplies (SPS). The solution suggested in this application note... (View Full Article)