Thermistor ?

[Spike009]

Hi guys, I have what looks like 2 red thermistor that blew up. They are located between both of my 240v line and my neutral. Can anybody confirm thermistor could be located there and does anybody have a idea why the blew up. How do I know what replacement part to get now that they blew up and that the number is gone.

 

[davenn]

Hi guys, I have what looks like 2 red thermistor that blew up.

rather than a thermistor they are likely to be ...
1) MOV ( most likely)
2 PTC

 

[Harald Kapp]

They are located between both of my 240v line and my neutral.

MOV!
A thermistor between life and neutral is useless. What's printed on the good ones you show in pic #2?

 

[Martaine2005]

I 2nd and 3rd that.



Martin

 

[Spike009]

Thank you for your answers. Yes it must be MOV. Thanks for getting me on the right track. I will try to find out why the voltage went up and blew up both of them. What do you guys think? Could the problem come directly from the varistors?

 

[Harald Kapp]

Could the problem come directly from the varistors?

Unlikely. Varistors usually are inactive, they become conductive in case of an overvoltage which cannot be caused by the varistors themselves.
If designed correctly, that is.
The device probably experienced a surge event on the mains line.

 

[Spike009]

Thank you for your answers. Yes it must be MOV. Thanks for getting me on the right track. I will try to find out why the voltage went up and blew up both of them. What do you guys think? Could the problem come directly from the varistors?

No fuses blown up on the card.