Emerson network power offer a digitally controlled 500w ac-dc power supply astec nts503 that gives a power density of 0.7 watt per cubic centimetre. Salient features includes that the power supply has compact 10.2x17.8 cm footprint and offers a choice of convection or forced air cooling.
The convection-cooled model has an output of 200w and a height of 3.8 cm, making it ideal for 1u [4.4cm high] rack-mount chassis and other low-profile applications, while the fan-cooled version can deliver its full rated output of 500w up to 50°c with 30 cfm forced air. Both the versions accommodate a wide ambient operating temperature range of 0°c to 70°c
