10pcs NO Temperature Control Switch, KSD9700 Normally Open Thermal Protector 250V 5ATemperature Controller 40-100℃(50℃)

10pcs NO Temperature Control Switch KSD9700 Normally Open Thermal Protector 250V 5A Temperature Controller 40-100℃(40℃). This is an excellent normally open switch. Closes when when temperature is reached.

works great, all work as they should. using them to control pc fans

Long story on what I'm using it for, but it does allow the fan to turn on at the appropriate temperature (50c), but doesn't turn off. I've had it drop below 20c and it still wants to run. Unplug it and then plug it back in it stays off until it reaches 50c again, but it's frustrating.

I did not measure how precise it is, but it does not matter since it works well to silence fans when the amplifier does not play loudly.

Looks like a good product if I would have received the full 10 pieces like I paid for. Only received 7…..the baggie that they came in was torn also

Had them on my wish list so my wife bought them for me. I use the 40c n/o to operate a fan to cool a mobile radio for transmit on GMRS running 30 watts. Works great, tested it on the bench before putting it in service. Mine came on at 40c and off at about 39c.

Installed on a Sunlu Dryer to start a fan but it starts the fan but after the temperature cools down the fan keeps working.

NO=normally open below threshold ; closed above thresholdGood thermal switch