Understanding How NTC & PTC Inrush Current Limiters Work

This video will hopefully give you a better understanding by method of demonstration, of how NTC & PTC inrush current limiters are designed to operate. NTC's are commonly found in power supply circuits, and also used to limit inrush current to power transformers and small motors. PTC's are used for over-current protection(replacing fuses), and also for monitoring rechargeable battery temperatures. If the battery gets too hot while charging, the circuit will be interrupted.

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