High inrush current can be produced when equipment is turned on. If steps are not taken to minimize this inrush current, it can damage power devices and reduce equipment life. A safe and cost effective way to reduce inrush current is to use an inrush current limiter (Power Thermistor), which is a special type of negative temperature coefficient (NTC) thermistor. Constructed with high temperature materials for long life and durability, an NTC thermistor's resistance drops logarithmically as its body temperature increases. The function of a Power Thermistor is to first block the inrush current and then remove itself from the circuit. It blocks the incoming current spike by offering a relatively high resistance at turn on.