Available in a variety of board disc diameter options, the POWrTherm NTC thermistor protectors have a wide resistance range. There are seven models in the series to meet specific application and market needs, says Bourns.

Models BN-LG05Y, BN-LG08Y, BN-LG10Y, BN-LG13Y, BN-LG15Y, BN-LG20Y and BN-LG25Y are constructed using various metal oxides to form the polycrystalline NTC thermistor bodies, claimed to provide superior capabilities in suppressing high inrush currents. The seven POWrTherm thermistors offer equivalent capacitance up to 1500μF at 240V AC and a maximum current up to 15A.

The devices are housed in radial leaded through-hole packages and are UL and/or TÜV recognised depending on the model. The thermistor protectors are available in different disc sizes to meet a range of requirements for market segments from consumer to industrial, for applications such as switched-mode power supplies (SMPS), DC motors, amplifiers and transformers.

The company used its power protection expertise to provide “a different and efficient technology approach to suppress inrush current” said Shawn Yu, product line manager at Bourns’ protection division, describing the POWrTherm Power NTC thermistors. The devices use the high initial resistance of negative temperature co-efficient characteristics to effectively control and minimise unwanted inrush current, he continued. “This feature proves beneficial in mitigating the potentially harmful effects of excessive current at start up. Additionally, during regular operation, the [devices’] resistance . . .  significantly decreases, allowing for improved efficiency across a wide range of applications. As power demands continue to grow in modern end products, achieving enhanced efficiency has become increasingly critical," Yu added.

All seven POWrTherm NTC thermistor series protectors are available now and are RoHS-compliant and halogen-free.