Thermistors

  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 1Ω (at 25°C)
  • Maximum steady state current of 36A
  • Maximum recommended energy of 300J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +255°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 2Ω (at 25°C)
  • Maximum steady state current of 25A
  • Maximum recommended energy of 300J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +236°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 50Ω (at 25°C)
  • Maximum steady state current of 6A
  • Maximum recommended energy of 250J
  • Body temperature of +177°C at maximum current
  • Maximum disc diameter 30mm
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 50Ω (at 25°C)
  • Maximum steady state current of 6A
  • Maximum recommended energy of 250J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +177°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 5Ω (at 25°C)
  • Maximum steady state current of 20A
  • Maximum recommended energy of 300J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +204°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 7Ω (at 25°C)
  • Maximum steady state current of 15A
  • Maximum recommended energy of 250J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +214°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 0.5Ω (at 25°C)
  • Maximum steady state current of 50A
  • Maximum recommended energy of 500J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +215°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 10Ω (at 25°C)
  • Maximum steady state current of 18A
  • Maximum recommended energy of 500J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +215°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 1Ω (at 25°C)
  • Maximum steady state current of 40A
  • Maximum recommended energy of 800J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +215°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 20Ω (at 25°C)
  • Maximum steady state current of 10A
  • Maximum recommended energy of 500J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +235°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 2Ω (at 25°C)
  • Maximum steady state current of 35A
  • Maximum recommended energy of 750J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +235°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 3Ω (at 25°C)
  • Maximum steady state current of 30A
  • Maximum recommended energy of 750J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +215°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 5Ω (at 25°C)
  • Maximum steady state current of 25A
  • Maximum recommended energy of 600J
  • Voltage rating from 120VAC to 680VAC
  • Body temperature of +212°C at maximum current
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 10Ω (at 25°C)
  • Maximum steady state current of 1A
  • Maximum recommended energy of 2J
  • Body temperature of +112.8°C at maximum current
  • Maximum disc diameter 3mm
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 220Ω (at 25°C)
  • Maximum steady state current of 2A
  • Maximum recommended energy of 2J
  • Body temperature of +175°C at maximum current
  • Maximum disc diameter 3mm
  • Exempt
  • Ametherm
  • Inrush current limiting thermistor
  • Resistance of 120Ω (at 25°C)
  • Maximum steady state current of 1A
  • Maximum recommended energy of 12J
  • Body temperature of +121°C at maximum current
  • Maximum disc diameter 5.5mm
  • Exempt

Manufacturers

Looking for Thermistors?

Looking for Thermistors?

The below manufacturers are all of our authorised partners that produce Thermistors or related products.

Thermistors

Rhopoint is proud to be an authorised partner to Ametherm, bringing our customers a range of thermistors suited to a vast array of applications and industries.

There are two types of thermistors (thermally-sensitive resistors), Negative Temperature Coefficient (NTC) and Positive Temperature Coefficient (PTC). The difference is that NTC thermistors exhibit a DECREASE in resistance as body temperature increases, while PTC thermistors exhibit an INCREASE in resistance as body temperature increases.

Applications for NTC and PTC Thermistors include:

  • Temperature Compensation
  • Temperature Measurement
  • Temperature Control
  • Inrush Current Limiting
  • Automotive
  • Military
  • Industrial
  • Emissions Control
  • Time Delay

Benefits of NTC and PTC Thermistors

Our thermistors are built to be rugged, reliable and stable. They are equipped to handle extreme environmental conditions and noise immunity more so than other types of temperature sensors.

  • Compact size: Packaging options allow them to operate in small or tight spaces; thereby taking up less real estate on printed circuit boards.
  • Fast response time: The small dimensions allow for a quick response to change in temperature, which is important when immediate feedback is required.
  • Cost-efficient: Not only are thermistors less expensive than other types of temperature sensors; if the purchased thermistor has the correct RT curve, no other calibration is necessary during installation or over its operational life.
  • Point match: The ability to obtain a specific resistance at a particular temperature.
  • Curve match: Accu-curve range of interchangeable thermistors have an accuracy of +0.1˚C to + 0.2˚C.

Inrush Current Limiters

Inrush Current Limiters are used to reduce the inrush current that occurs when an electrical device is switched on. High inrush current is the result of the maximum instantaneous input current drawn by an electrical device during the initial power-up. As technology continues to advance, most systems today run efficiently and maintain a low impedance which in turn contributes to high inrush current.

Additionally, devices that produce alternating currents such as electric motors or transformers can draw several times their steady-state current at switch on. Although this additional draw of inrush often lasts less than ½ of a normal 60-hertz cycle, that is enough time to cause possible damage to the equipment.

It can sometimes be hard to find exactly what you need. If you are struggling to locate the parts you are looking for, or would like some advice on what to select, talk to one of our friendly advisors who will be happy to help. Find out now!

Please be advised that due to the ongoing supply issues with raw materials affecting the global electronics industry, as well as an increase in orders received by our manufacturing partners, a large number of products are facing increased lead times in recent months. For the latest lead time and stock availability, please contact one of our engineers who will be happy to discuss lead times further and the potential for alternative parts.