When traditional fuses are being used for over current protection it can only protect once then it must be replaced. The PTC resettable fuse is a new-type of over current protection element which has two functions providing over current protection and automatic reset.The over current protection PTC element is serially connected to the circuit and under normal circumstances it provides a low resistance state and can ensure the normal working of the circuit. If a short circuit or unusually high current occurs, the PTC fuses cut in to reduce the voltage down to a trickle thus preventing damage and protecting the equipment.The PTC fuse will automatically reset once the fault in the over current is removed. The PTC elements will automatically return to its low resistance state, which not only avoids maintenance or replacement but also avoids a continuously circulating switching state which can cause circuit damage.

Metal cased PSU providing dual purpose 24V AC outputs. Each output uses PTC fuse and is provided with internal LED indication