Cotek open frame power supplies 200w 400w cotek up 500 12 this 12v open frame power supply from cotek has a compact u profile 38mm and high power density offering an impressive 400w manufactured to a high standard with excellent efficiency and reliability while equipped with short circuit overload over voltage and over temperature protection additional first rate features include the 105degc long life electrolytic capacitors power ok signal free air convection for 400w and high