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A power supply unit is an electronic device that converts electrical energy from a source (usually mains voltage) into the appropriate voltage and current required to power various electronic components and systems. The power supply unit transforms the voltage into a lower DC voltage. Its main role is to provide a stable and reliable electrical supply for the operation of the appliances. The power supply unit eliminates unwanted electrical noises and ripples that can damage sensitive electronic components. Many power supplies have built-in protection that prevents damage to connected devices in the event of an overload or short circuit.
Power supply units are used to power machines, for all kinds of devices, such as televisions, audio systems, routers, automated systems and other industrial devices requiring specific voltage and current levels, etc.
