This is a 100K NTC type Thermistor. As the temperature increases, the resistance decreases and is used for over voltage protection. It is installed parallel in a circuit.
Datasheet: Click Here
B Constant 4400K
Resistance 100K OHM
Temperature -30°C to +125°C
Thermistor Type NTC Thermistor
Quality item.The item I received was a little different than pictured. It was black in color marked only '104'.
I did not compare it to the manufacturer's chart but I worked as I expected it to and performed it's purpose.
This item has 1" straight leads and breadboard friendly.
I would buy it again and I would recommend it to a friend.