- Ametherm is a leading manufacturer of Power Thermistors. Ametherm offers the highest rated steady state current rating as well as highest rated energy handling capability offered in the market. Their excellent long-term stability and rugged structure makes them ideally suited for limiting Inrush current in the motors (1/3HP to 3.0 HP range), medical (Power supplies, MRI), Security systems (X-Ray machines), transformers (up to 8.0KVA), telecom (Power supplies up to 4000 watt out put power) and motor drives, in the most cost effective method. 

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Digi-Key’s library of more than 2000 exclusive PTM Online… On Demand® product training modules is a collection of training tools created with you – the busy design engineer – in mind. They are provided with the cooperation of participating supplier partners. From this one source, you can learn about the latest products and technologies, download datasheets, check inventory, contact our technical staff, and place an order for same-day shipment.

These modules are available in audio and non-audio formats and listed by supplier in easy-to-find alphabetical order. Simply locate the module that interests you and click on your format of choice. We hope you find these tools useful, and with new modules added continuously, we invite you to stop back often to see what’s new.

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Updated PTM = Updated Product Training Module - PTM        New PTM = New Product Training Module - PTM

Module NamePreviewAudioNon-AudioDurationParts List
  • Battery Precharge Overview
1.8MB290KB5 MinParts List
  • Choosing NTC Thermistor for Inrush Current Limiting: Capacitive Applications
2.5MB183KB5 minParts List
  • Describing Transformer Protection from Inrush Current Using the NTC Thermistors
1.5MB250KB5 minParts List
  • Inrush Current Limiters Overview
1.8MB847KB5 minParts List

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More about Ametherm

What we do
Ametherm, established in 1994, manufactures rugged Inrush Current Limiting Thermistors also known as Power Thermistors.

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.

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.

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.
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