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Ametherm's circuit protection thermistors deliver through innovative design and quality. Thermistors are used in temperature compensation, voltage regulations, circuit protection, time delay, and volume control. Other thermistor applications are prominent in the medical (Power supplies, MRI), industrial, automotive (1/3 HP to 3.0 HP range), HVAC, and aerospace industries. These make Ametherm thermistors highly versatile electronic components.
IBS Electronics is a Ametherm authorized distributor. As a ISO 9001:2015 & AS9120 certified distributor of electronic components you can trust IBS Electronics to offer you the best prices on Ametherm's thermistors and the highest level of quality assurance in the industry.
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 Temperature Sensor - The Thermistor Ametherm plant is located in Carson City, Nevada USA is equipped to proccess 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 has maunfacturing facility in Carson City, Nevada. Since 1994, Ametherm has manufactured Inrush Current Limiters that have changed the industry, one innovation at a time. From their locally owned and operated Carson City, NV HQ, they have produced a variety of products for markets such as Power, Medical, Automotive, and Aerospace Markets. Made in the USA, Ametherm is an ISO 9001:2015 & AS9120 company with thermistors that are UL/CSA approved, REACH Compliant, and RoHS Compliant (with some exemptions). For the past 20 years, Ametherm has kept their focus on Customer Service and have grown exponentially as a company- recently acquiring the SG/NTC Chip & Disc line from Measurement Specialties (Formerly RTIE).
Ametherm Products: |
ACC / ACW Series ±0.2°C Interchangeable NTC Thermistors
These thermistors offer a highly accurate and stable temperature sensing capability for applications such as temperature measurement or compensation, and can be mounted into a variety of probes and assemblies.
- Operating temperature range -40°C to 150°C
- 2.252K Ohms to 100K Ohms
- Accurate to 0.2°C (0°C to +70°C)
- 10 second time constant
AS Series Low Power Inrush Current Limiting thermistors
The new AS series of ICL thermistor dissipates between 25% to 43% less power than standard inrush current limiters with the same current and resistance ratings. This means that these ICL thermistors run cooler at Imax compared to conventional thermistors, which in turn increases their longevity.
MS Series MegaSurge Inrush Current Limiting thermistors
Surge currents that occur when electrical circuits are switched on can cause serious damage to sensitive electronic components if their rated current values are exceeded. These surge currents can be controlled and eliminated using the MegaSurge inrush limiters.
- High energy to 900J
- Steady state current to 50A
- Working voltage to 680Vac
- Limit current inrush to electric motors and PSUs
PANE series NTC thermistors
Ametherm NTC thermistors are manufactured from a specially-formulated metal oxide ceramic material that is extremely accurate in sensing temperature. Same high quality material is used in wide variety of housings and leaded parts for various applications such as:
- Temperature Sensing
- Temperature Detection
- Transformers
- Electric Motors
- Air Sensors
- HVAC
MM35-DIN series NTC thermistors
 The Ametherm MM35 series comprises NTC thermistors engineered for inrush current limiting, capable of withstanding high input energy of 1200J and maintaining steady-state currents within the range of 50.0 to 80.0A at 680V. These thermistors come in packages suitable for DIN rail mounting and are ideal for optimizing power distribution in high-power industrial applications and green energy systems, including variable-frequency motor drives, transformers, wind turbines, large inverters, and both single- and three-phase motors.
These thermistors offer a space-efficient and cost-effective solution, serving as single-component alternatives to using power resistors in conjunction with relays or MOSFETs. This simplifies design processes significantly. Additionally, installation is straightforward, as these devices are designed to be used with a DIN block. This allows for easy mounting within a power control box using just a screwdriver. Within the MM35-DIN series, there are four thermistor models, each characterized by a resistance of 0.2 to 1.5 ohms at 25C, a maximum power rating of 38.4W, and thermal time constants of less than 300 seconds. These devices have a diameter of 68.0 mm and thickness options of 8.5 mm and 9.5 mm.
SG Series Inrush Current Limiting Thermistors
Surge currents which occur when electrical circuits are switched on can cause serious damage to sensitive electronic components which may exceed their rated values unless the surge is controlled. Damaging surges may be prevented by using Surge-Gard inrush current limiters.
- High hot to cold resistance ratio
- 30 types of stocked Inrush Current Limiting (ICL) thermistor
SL Series Inrush Current Limiting thermistors
Surge currents that occur when electrical circuits are switched on can cause serious damage to sensitive electronic components if their rated current values are exceeded. Damaging surge currents can be prevented by placing an Inrush Current Limiting (ICL) thermistor in series with the load, thereby protecting critical parts of the circuit.
SM04 Series Surface Mount NTC Thermistor
A range of 0402 surface mount NTC thermistors.
FEATURES:
- Nickel Barrier Termination
- Suitable for wave or reflow solder
- Available in tape and reel packaging in 100 - 5000 quantities
- Moisture Sensitivity Level: 2
- Thermal Time constant of 1.5 seconds
- Dissipation Constant of 1.1mW/°C
SM06 Series Surface Mount NTC Thermistor
A range of 0603 surface mount NTC thermistors.
FEATURES
- Nickel Barrier Termination
- Suitable for wave or reflow solder
- Available in tape and reel packaging in 100 - 5000 quantities
- Moisture Sensitivity Level: 2
- Thermal Time constant of 2.0 seconds
- Dissipation Constant of 1.5mW/°C
SM08 Series Surface Mount NTC Thermistor
A range of 0805 surface mount NTC thermistors.
FEATURES
- Nickel Barrier Termination
- Suitable for wave or reflow solder
- Available in tape and reel packaging in 100 - 5000 quantities
- Moisture Sensitivity Level: 2
- Thermal Time constant of 2.5 seconds
- Dissipation Constant of 2.0mW/°C
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Ametherm Inrush Limiting Thermistors: |
AS Series
Inrush Current Limiter
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- .5 - 50 Ohms
- 6A - 50A SSI
- 300 - 800 Joules
- 30mm - 36mm dia
- Fast Reset Time
- Extra Rugged
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MegaSurge
Inrush Current Limiter
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- .5 - 220 Ohms
- 2A - 50A SSI
- 75 - 900 Joules
- 12mm - 35mm dia
- High Power
- Extra rugged
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BigAmp
Inrush Current Limiter
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- .2 - 120 Ohms
- 3A - 36A SSI
- 65 - 250 Joules
- 22mm - 32mm dia
- High Current
- UL & CSA
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| Key Benefits of Ametherm’s AS Series Inrush Current Limiters |
- Lower current density (as compared to traditional types of inrush current limiters)
- Faster reset time
- No hot spots from fatigue, because of lower current density and uniform temperature gradient throughout the disc
- Wider temperature range of operation with out de-rating
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| Ametherm Applications(MegaSurge) |
Ametherm Inrush Limiting Thermistors(MegaSurge):
The MegaSurge inrush current limiter is useful in:
- AC Motors
- Frequency Generators
- Power Supplies
- Plasma Cutting Tools
- Motor Drives
- MRI Machines
- Audio Amplifiers
- Toroidal Transformers
- Battery Chargers
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| Ametherm Characteristics:(Product Range) Ametherm has one of the smallest and most accurate and fast NTC sensors on the market. Ametherm's thermistors are available in a whole range of types, materials and sizes characterised by their response time and operating temperature.
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| Ametherm Specifications |
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| MegaSurge Datasheet PDF |
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| Ametherm bigAMP Applications |
Ametherm's bigAMP Inrush Current Limiters are specially designed thermistors able to withstand up to 36 amperes of continuous current and 260 joules of input energy.
The bigAMP Inrush Current Limiter is useful in:
- Switching Power Supplies
- AC Motors
- Uninterruptible Power Supplies
- Frequency Generators
- Other equipment that can be improved with inrush current protection
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| Ametherm Product Range |
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| Ametherm Specifications |
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| Big AMP Datasheet PDF |
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| Ametherm miniAMP Applications |
The miniAMP series is designed for applications where board space is limited and cool operation is desired. The cost effective miniAMP inrush current limiter is an efficient way to protect components such as relays, diodes, and fuses from inrush current.
The miniAMP series is available in 3, 5, and 8mm diameters and weigh as little as .06 grams. The miniAMP series cold resistance ranges from 5 ohm to 220 ohm. |
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| Ametherm Product Range List: |
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| Applications(Standard) Potential instrumentation applications seem endless as well. NTC thermistor probes can be used for motor winding compensation, transistor temperature compensation, infrared sensing compensation, gain stabilization and piezoelectric temperature compensation.
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| Large variety of the sizes and electrical specifications of the most common inrush current limiters |
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| Characteristics:(Product Range) Since 1994, Ametherm has provided the most reliable and effective inrush current limiting solutions available. |
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Specifications | Ametherm Datasheets
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| Ametherm Applications (NTC Thermistors) |
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 There are many potential applications for NTC thermistors. Their accuracy and stability make them highly useful for a wide range of purposes. These applications include temperature measurement, compensation, and control.
NTC thermistor probes are generally used as resistance thermometers. They are extremely versatile and accurate, which makes them ideal for a wide variety of applications that measure temperature. Thermistor probes work especially well for lower range of temperatures.
There are many automotive and transportation, and military applications for NTC thermistor probes, including industrial process controls, emissions controls, and differential temperature controls. Thermistor probes can be used in automobile and truck tire curing, as well as for monitoring and controlling engine temperatures. They are even used in missiles and spacecraft.
Some more potential equipment uses of NTC thermistor probes are for plastic laminating and hot glue, as well as fire protection and safety. Copy machines and industrial soldering irons both use NTC thermistor probes. Hot mold and chemical analysis equipment is another potential application for NTC thermistor probes.
Some more potential equipment uses of NTC thermistor probes are for plastic laminating and hot glue, as well as fire protection and safety. Copy machines and industrial soldering irons both use NTC thermistor probes. Hot mold and chemical analysis equipment is another potential application for NTC thermistor probes.
Other uses for NTC thermistor probes range from applications for sensor assemblies and industry to telecommunications, as well as many kinds of medical, laboratory, and scientific instruments and testing. They are used in fiber and photographic processing, solar, meteorological, geological, and oceanographic research equipment, as well as consumer and household appliances.
You may well already have NTC thermistor probes being used in your burglar alarm and fire detectors, for your oven, air conditioning, refrigerator temperature control, or fever thermometer. There are more specific applications for NTC thermistor probes that include bathythermography, calorimetry, titration, spectrophotometry, osmometers, bolometry, and thermodilution.
Potential instrumentation applications seem endless as well. NTC thermistor probes can be used for motor winding compensation, transistor temperature compensation, infrared sensing compensation, gain stabilization and piezoelectric temperature compensation.
While the majority of NTC thermistor applications are based on their resistance-temperature characteristic, they can also be grouped according to other basic electrical applications. For example, current-time uses include time delay, surge suppression, and sequential switching. Among the voltage-current uses are vacuum manometers, anemometers, automatic gain, amplitude and level control, flow meter voltage regulation, liquid level control and fluid velocity, alarm volume, signal expansion and compression and thermal conductivity analysis as well switching devices and gas detection.
Ametherm's NTC Thermistor probes can be used for through-hole applications, temperature detection and compensation, as well as circuit protection. There are NTC thermistor probes available to fit nearly any design or desired application. Ametherm's NTC Thermistor probes are all rugged and reliable over a wide temperature range and built using high temperature materials for long life and durability. Ametherm's NTC Thermistor probes are also available in several custom configurations. |
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Ametherm, established in 1994, manufactures rugged Inrush Current Limiting Thermistors and NTC Thermistors for temperature compensation and control. Ametherm is a world-class manufacturer of an extensive variety of the highest quality thermistors as well as thermistor and RTD (Resistance Temperature Detectors) probes and assemblies. Ametherm's products are used in industries ranging from automotive, consumer electronics, food handling and processing to medical electronics, military/defense and aerospace. Customers worldwide use Ametherm's temperature sensors in their most demanding temperature sensing applications.
Thermistors and thermocouples are two such temperature sensors. NTC thermistors weigh in to be an excellent choice for your temperature sensing solutions for their overall performance and cost-effectiveness. A thermistor is a thermally sensitive resistor that exhibits a continuous, small, incremental change in resistance correlated to temperature variations. Thermocouples reflect proportional changes in temperature through the varying voltage created between two dissimilar metals electrically bonded together. Both are good options for temperature sensing and control. Choosing the best option depends on the type and specifications of the application.
Ametherm Sensing Thermistors
Ametherm's Mini-Amp Thermistors / Inrush Current Limiters
Surge-gard™ NTC Inrush Current Limiters