4 Way 12v DC 4 Amp Boxed PSU
Surge Protected with Auto Reset Fuses
The PSU4/4 - 4A uses the latest technology PTC fuses,
eliminating replacing fuses after overvoltage or short circuit occurs.
When traditional fuses are being used for overcurrent protection they can only protect once
then they must be replaced.
The PTC resettable fuse is a new style of overcurrent protection element
which has two functions providing 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 down 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 its low resistance state, which not only avoids
maintenance or replacement but also avoids a continuously circulating switching state which can cause circuit damage.