This wall mounted 28V switching power supply provides a high-power-density and cost-effective solution for a variety of application field. The fuyuang power supply switching operates at a high switching frequency to achieve high efficiency in all load conditions, with a low total standby consumption and low output ripple and noise. Full protection functions improve the reliability including OCP, OVP, OLP, and effective thermal management enhances reliability further, allows the 28 volt dc power supply to operate at full power at higher ambient temperatures. The 28V ac dc adapter family includes higher power rating models up to 150W such as 28V 5A power supply.