Au Wire Bond-Optional NTC Thermistors

TDK Corporation’s NTCWS series of NTC thermistors is available with Au wire bonding. These bondable NTC thermistors can be mounted with Au wire bonding inside the package for highly accurate temperature detection of laser diodes (LDs) used for optical communication.

The use of LD devices in optical communication transceivers is increasing, as typified by 5G and LiDAR used for inter-vehicle distance measurement. Since the wavelength of LDs changes with temperature, controlling the temperature of LDs is the key to improving their performance.

The NTCWS series of temperature sensors support a narrow tolerance (±1%) of resistance and B value. They can be mounted with Au wire bonding near the LD for highly accurate temperature sensing. The NTCWS series thermistors feature a compact, lead-free design and withstand operating temperatures of -40°C ～ +125°C. TDK has initially released sensors with a B value of 3930 K ±1 % (the NTCWS3UF103FC1GT and NTCWS3UF103HC1GT) and plans to release additional products with other characteristics.