Convection cooled medical power supplies ideal for low audible noise applications

TDK Corporation has introduced the TDK-Lambda brand CUS350MP series of AC/DC power supplies with medical and industrial safety certifications. This series is rated at 350W convection, 500W with forced air and can offer up to 1000W peak power. This makes the series excellent for low audible noise applications needing occasional high peak power demands, including medical equipment using DC motors and industrial printers. These markets are frequently served by larger, more expensive, non-peak capable power supplies.

The series accepts an 85VAC to 265VAC input and has a leakage current of lower than 300µA. Four output voltages are available – 24, 30, 36 and 48V. A 5V 0.3A isolated standby voltage and remote on/off is installed as standard. The typical full load operating efficiency is 94% with a 230VAC input. The operating ambient temperature is -20C to +70C, derating linearly above 50C to 30% load. Including the baseplate, the open frame models measure 88mm x 183mm x 44mm (W x L x H) and weigh 770g. A cover, screw terminal connections, double-sided board coating and a single AC fuse are offered as options.

The input to output isolation is 4000VAC (2 x MoPP), input to ground 1,500VAC (1 x MoPP) and 1,500VAC (1 x MoPP) output to ground for suitability in B and BF rated medical equipment. Safety certifications incorporate IEC/UL/CSA/EN 62368-1, IEC/EN/ES 60601-1, EN 62477-1 (OVC III), with CE marking to the Low Voltage, EMC and RoHS Directives. The units also comply with EN 55011-B, and EN 55032-B conducted and radiated emissions, meet the EN 61000-3-2 harmonics, IEC60601-1-2 Edition 4 and IEC 61000-4 immunity standards.