Current Limiters & NTC Sensing Thermistors Abound

Ametherm’s lineup for EDS 2018 will include a wide range of NTC and PTC inrush current limiters and NTC thermistor sensors. Inrush current limiters include the MM35-DIN series NTC thermistors designed to withstand high input energy of 1200 J and steady-state currents from 50A to 80A at 680V. Offered in DIN-rail-mountable packages, they are optimized for high-power industrial and green energy applications, including variable frequency motor drives, wind turbines, large inverters, single- and three-phase motors, and transformers. The MM35-DIN series features resistance at 25°C from 0.2Ω to 1.5Ω, with maximum power of 38.4W.


PTC circuit protection thermistors include the ceramic CL20 series for pre-charge circuits, degaussing circuits, and heater applications. The devices deliver voltage ratings up to 750 V and maximum energy ratings to 700J while offering four resistance values at 25 °C from 7.0Ω to 100Ω to accommodate a variety of pre-charge times. These resistance values remain unchanged over the typical operating temperature range of -40°C to +110°C. Providing high reliability and stability in high-voltage applications, CL20 series thermistors can withstand hundreds of hits of maximum inrush current without degrading.

Sponsored by Digi-Key

TE Connectivity Horticultural Lighting Solutions Available Now from Digi-Key

TE connector, relay and filter solutions can help create a fine maze network of power-cabling to the lights needed for vertical farming. Their solutions are interchangeable, easy-to-install, and will last for years in variable humidity environments.


NTC sensing thermistors include the PANR 103395-342 probe assembly with a ring lug for easy and secure mounting to battery terminals. The device is extremely accurate and experiences minimal drift from its initial electrical values to provide a high-stability replacement for thermocouples. The temperature probe features a high-dielectric withstand voltage, resistance at 25°C of 10 kΩ, beta of 3950° K, and dissipation constant of 8 mW/°C.


In addition, Ametherm’s ACCU-Curve series interchangeable NTC thermistors include the ACL-011, groomed for medical, industrial, and automotive applications. The device features insulated tinned-copper leads, ensuring the most accurate temperature sensing with no unintended conduction between leads. Offering a diameter of 1.524 mm and 32 AWG leads, the epoxy-coated thermistor features resistance at 25°C of 50 kΩ, with a tolerance of ± 1 %. The ACL-011 offers Beta of 3950°K, a dissipation constant of 3 mW/°C, maximum power rating of 50 mW, and an operating temperature range of - 40°C to + 125°C.


For more details, visit Ametherm or call the company at 800-808-2434 (toll free in the United States) or 775-884-2434 from outside the U.S. and Canada.

Suggested Articles

According to a new study by Fact.MR, the MEMS sensor market will grow at a compound annual growth rate of 9% through 2027, reaching $50 billion.

RaayonNova founder and CEO Aleksandr Shtukater is developing advanced contact lens technology that can potentially replace smartphones and tablets.

Analyst firm Omdia reverses earlier upbeat projection for smartphone growth in China due to virus impact on supplies like displays