Murata PTC thermistor has multilayered structure

Murata Mfg Co. Ltd has developed what it claims is a ceramic PTC thermistor (posistor) with the world's first multilayered structure. Using this technology, the company has started mass production of the small PTC thermistor (0805 EIA size) with circuit protection. The PRG21 series measures 2-by-1.25-by-0.9mm, and provides a resistance of 0.2 ohms with non-operating current of 0.5A at an ambient temperature of 60°C.

Suitable for USB equipment, power supply circuits, and other general electronic equipment, the device contains no lead, can be mounted with lead-free solder, and is applicable for reflow soldering at 260°C. The thermistor also features an Ni internal electrode and high thermal stability and reliability.