I have a device with a thermal fuse in it. The fuse has failed, and I would like to replace it.

Does thermal fuse have a polarity, similar to an electrolytic capacitor, or is it the same with normal fuse? It has a stripe marking on it.

Is it sensitive to polarization, or will either way work?


Short: No. Thermal fuses are not polarised.

Longer :-) :

No thermal fuse I have ever seen was polarised (based on decades of experience but ...).

I cannot think why a thermal fuse would be polarised.

This seems to be extremely unlikely but I mention it for completeness:
If a device that was called a thermal fuse WAS polarised then it would be more than a fuse - it would be very special in some unusual manner.
If so then it would need to be replaced by an identical unit if it was going to do the same job.

A photo would be a good idea.
Does it have a part number on it?

  • \$\begingroup\$ i can't see the part number, blew up already...but the mark there ( label ) is fuse.. \$\endgroup\$ – Rick Ant Jan 21 '12 at 10:09

protected by Dave Tweed Jun 13 '14 at 13:09

Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged or ask your own question.