Screw Clamp PTC Overheating Sensing Protection Lug Terminal Type 100C 2200 Ohm, Murata Code PTFM04BD222Q2N34BS POSISTOR Cross,  More details in https://amwei.com/murata-ptfm04bd222q2n34bs-ptc-lug-sensor-100c-2200-ohm/

Electrical Specifications
Max. operating voltage (TA = 0-40 C) Vmax: 30 VDC
Measuring voltage (TA = 25 C  Tsense) Vmeas 2.5 VDC max.
Rated resistance R25: 330 Ohm max.
Sensing temperature Tsense: 100C centigrade.
Resistance at 85℃ (Tsense-15C): 1500 Ohm max
Resistance at Sensing temperature 100C (Tsense): 2200 Ohm max.
Maximum permissible current: 100mA
Operating temperature range Top -25–+130 C
Operating temperature range (V = Vmax) Top 0–+40 C

PTC Metal Lug Tag Terminal Probe Features
Screw clamp type temperature sensor, for sensing the temperature of transistors, thyristors, stereo main amplifiers, and other devices having risk of overheat.
Limit temperature sensor with epoxy resin coating.
Tinned pin leads wire.
Metal lug tag screw clamp type easy mounting.
Metal tag lug permits good thermal coupling and
thus short response time.

PTC thermistors with their very steep curves are very suitable for the monitoring of temperature limits and consequently for switching on a fan when a particular temperature is reached.

Making use of the characteristics that the resistance of ceramic PTC thermistors increases sharply above curie temperature, when ambient temperature increases abnormally, protective circuit installed PTC thermistor will turn on or cut off loop through resistance changing, achieving thermal protection purpose.

PTC thermistors protect such equipment and components as motors, transformers, power transistors and thyristors against over-temperature.

A PTC thermistor is less expensive than a thermostat, and its switch temperature can be more accurately specified. It is also smaller and easier to design-in to electronic circuitry. Therefore PTC thermistors can be ideal devices for temperature detection, monitoring, indicating, limiting and over (excessive) temperature protection.