This section provides guidance in choosing the best overcurrent circuit protection device. Many times choosing between using . PolySwitch device operation is based on an overall energy balance, as shown in. Like traditional fuses , these devices limit the flow of dangerously high current. As to their possibilities of application, PTC thermistors can be divided in the following manner:.
Figure illustrates the two operating states of a PTC fuse.
Positive temperature coefficient ( PTC )thermistors — also called resettable fuses or polymericpositive temperature coefficient devices (PPTCs) . Positive Temperature Coefficient ( PTC ) devices are simple, inexpen-. PTC – Time-current curves are most similar to a time-delay fuse. This is a handy little device that can save your system from smoking.
A resettable fuse (also known as a PTC ) is a resistor that has very unique properties. A discussion of the different considerations for choosing a fuse , some of the industry vernacular, and applications for different kinds of fuses. Barry Brents of TE Circuit Protection walks you through the process of deciding between a PolySwitch.
I would like to start using PTC ( Resettable Fuses ) in my projects. Continue reading