The TDK-corporation introduced the CUS400M medical and industrial certified AC-DC power supplies with 12V and 24V outputs in the industry standard 3 x 5 footprint. With forced air, the new devices can deliver 400W power and it can supply 250W when convection cooled with a peak capability of up to 400W. The duration period of that peak is up to 30 minutes (40°C ambient, 230Vac input) with a maximum duty cycle of 50%, which is considerably longer than the other similar products in the market.
All the models in the series accept an 85 to 264Vac input and have a no-load power consumption of less than 1.3W when the output is inhibited. The users can leverage a 5V 2A or 12V 1A standby voltage, remote on/off, remote sense, AC fails and an output good signal if required. The series has a choice of mechanical configurations and is available in Open frame, baseplate, U-channel, and enclosed versions.
The input to output isolation of the CUS400M is 4,000Vac (2 x MoPP), whereas the input to ground isolation is 1,500Vac (1 x MoPP) and an output to ground isolation is 1,500Vac (1 x MoPP), hence they are suitable to be used in B and BF rated medical equipment. The leakage current is <250µA and the touch current is <100µA.
The bottom of the CUS400M circuit board is inserted into a thermally conductive insulated plastic base so that the heat from the surface-mounted power components can be dissipated into the cold plate or the chassis. The overall size of the open frame model is 77.5mm x 128mm x 39.5mm (W x L x H). The maximum operating, transportation, and storage altitude of the CUS400M is 5,000m. The CUS400M is best suitable for applications with a relatively low quiescent power consumption and occasional peak demand, including hospital beds, dental chairs, and incubators.