Low audible noise medical and industrial power supplies

TDK Corporation has introduced the TDK-Lambda brand CUS800M and CUS1000M AC/DC power supply series in a 6.73" x 3.35" x 1.67" (171mm x 85mm x 42.5mm) case size. Rated at up to 800W and 1000W, these very compact products also provide a variable speed fan with typically 30-42dBA audible noise.

The series accepts an 85VAC to 265VAC input, supplying full power at 90VAC, and is available with 12V, 24V, 36V and 48V outputs. A 5V 2A standby voltage, remote on/off, remote sense and a power good signal are standard, with efficiencies of up to 95.5% and internal heating decreases, enabling reliable operation in the compact package size. The off-load power consumption is typically <0.6W when the supply is put into standby mode. These CUS-M models can operate in -20C to +70C ambient temperatures, derating linearly from 40C to 60% load at +70C. The models offer a five-year warranty.

The devices have an input-to-output isolation of 4000VAC (2 x MoPP), an input-to-ground isolation of 2000VAC (1 x MoPP), and an output-to-ground isolation of 1500VAC (1 x MoPP) for B and BF-rated medical equipment. The leakage current is <250µA, and the maximum operating, transportation and storage altitude is 5000m.

Safety certifications include IEC/EN/ES 60601-1 and IEC/EN/UL 62368-1 with CE/UKCA marking for the Low Voltage, EMC and RoHS Directives. The units also comply with EN 55011-B and EN 55032-B conducted and radiated emissions and meet the EN 61000-3-2 harmonics, IEC60601-1-2 Edition 4 and IEC 61000-4 immunity standards.

Power supplies can be employed in a wide range of applications, including medical, dental, test and measurement, broadcast, and industrial equipment.