Outline
When the line transmitting small power short circuits with the ground or the like, some troubles may occur such as heat generation on the current supply board or decrease in the power supply capacity. Previously, a fixed resistor was inserted on the line. However, simply by inserting "POSISTOR" on the line instead of the fixed resistor, abnormal current flow when a short circuit occurs is limited to protect the line. Murata's "POSISTOR" for overcurrent protection generates heat by itself due to abnormal current flow during short circuits increases the resistance of "POSISTOR" to limit the abnormal current flow, and prevents the current supply board from fuming, firing, or being damaged. An appropriate type of "POSISTOR" can be selected according to the circuit current. Circuit example: Protecting small power lines from short circuits
		When an electric signal or power line shorts out during transmission from circuit unit A to circuit unit B, the sending port (unit A) may suffer from overheating or output voltage drop. A chip resistor is usually used as a short circuit protector, but since resistance value of the resistor must be rather high, the power consumption and voltage drop that comes with a high resistor under normal operation has been difficult to deal with. Chip "POSISTOR" presents a solution because it can behave like a chip resistor with low resistance under normal operation and then change to high resistance when the circuit shorts.
	Roles of "POSISTOR"
Increases the resistance of "POSISTOR" due to abnormal current flow when short circuits occur on the line, and limits the abnormal current flow to prevent the current supply board from fuming, firing, or being damaged. Decreases the resistance of "POSISTOR" and unlike the fuse, recovers its original resistance when the short-circuiting stops.

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