Unknown Ceramic Disc

[jaredstearns]

I dont know enough to properly identify this part. Just by looking at it can someone determine what it is or do I need to use a multimeter? There are six and I believe the three letters are "PTC". I put the part under a scope to get a nice picture. Any help is greatly appreciated!

-Jared

 

[chemelec]

I dont know enough to properly identify this part. Just by looking at it can someone determine what it is or do I need to use a multimeter? There are six and I believe the three letters are "PTC". I put the part under a scope to get a nice picture. Any help is greatly appreciated!

-Jared

It is a Positive Temperature Thermistor.
But What actual Value, that another question.

Does it Still Measure a Resistance?

Does it Change Resistance with Temerature?

 

[Nigel Goodwin]

Yes, it's most probably a positive temperature coefficient thermistor - what is it out of?.

 

[jaredstearns]

reply

All thermistors have the same resistance of 25hm: at room temperature. I applied a heat gun and the resistance jumped to around 55hm: within 3-4 seconds. I got the thermistor to around 250-300 degrees F. Thank you for the help.

The thermistor is out of an old Balluff Encoder that supplies commutation for a servo motor in a CNC machine. There are six commutation channels, each one having this part.

 

[Roff]

All thermistors have the same resistance of 25hm: at room temperature.<snip>

All thermistors in your collection, maybe. In the entire universe? I don't think so.

 

[jaredstearns]

By "all" I meant all six unknown thermistors in question.

 

[Andy1845c]

Those are the best close up component pictures I have ever seen here

 

[killer007]

hi all

I need to get information concerning components, eg if the circuit says a 555 to find out what other part can i use that has the same function!!!

 

[evandude]

hi all

I need to get information concerning components, eg if the circuit says a 555 to find out what other part can i use that has the same function!!!

Okay, well step 1 would be to post your question in an appropriate place.

Either search and find a thread that is relevant to your question and post there, or start a new thread.

This thread has NOTHING whatsoever to do with what you just asked, and so it is not an appropriate place for it.

 

[Hero999]

It's probably used for overcurrent protection. When too much current flows the reistance increases dues to I²R heating until only a small current flows.

 

[ravix]

This is off topic, but check out my component page if you want to see some nice pictures of electrical components

**broken link removed**


(I am not advertising here, as you'll see if you go to the site. It is certainly not commercial.)