103KT1608T Datasheet PDF - SEMITEC Corporation

SMD type chip
Chip thermistors are specially processed, highly reliable thermistors.
They can be face-bonded to act as thermal compensators for ICs and they are manufactured in sizes down to 1 square mm, they can also be used to detect temperature with relatively small time constants.

Precautions
   Do not expose the thermistors to high soldering heat
   for more than specified time.
   (260°C for not longer than 10s is recommended)