This AC DC adapter 12V 3A is built with the latest power supply technologies and the quality components materials to enable high performance. It features resonant-ring valley-switching operation for high operating efficiency, green-mode power-saving operation to achieve excellent energy efficiency performance. The AC DC adapter 12V output provides both constant voltage regulation and over-current protection. The ac/dc adapter provides excellent EMI performance working at 80-kHz Maximum switching Frequency, with fault protections to maximize the reliability. Effective natural cooling thermal management enhances operating performance and reliability, enables the AC DC power adapter 12V 3A to operate at full power at higher ambient temperatures.