Haydon CCTV 9 Output 5Amp power supply

When traditional fuses are being used for overcurrent protection, they can only protect once, and then it must be replaced. The PTC resettable fuse is a type of overcurrent protection element that has two functions: overcurrent protection and automatic reset.

• The overcurrent 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 to a trickle, thus preventing damage and protecting the equipment.

• The PTC fuse will automatically reset once the fault in the overcurrent is removed. The PTC elements will automatically return to their low resistance state, which not only avoids maintenance or replacement but also avoids a continuously circulating switching state that can cause circuit damage.