Science Fair Project Encyclopedia
Polyswitch
A Polyswitch is a form of Positive temperature coefficient resistor which acts as a self repairing fuse.
A polyswitch has a current rating . When the current flowing through the polyswitch, (which acts as a resistor) exceeds the current limit of, (for example) 100 mA, the polyswitch warms up above a threshold temperature and the resistance of the polyswitch suddenly increases from a few ohms to a few kiloohms.
When the polyswitch cools down again the resistance drops to its former level.
10-26-2009 08:16:03
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details