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CUS400M – 400 W medical and industrial power suppliers
RF & Microwave Components

CUS400M – 400 W medical and industrial power suppliers

TDK-Lambda announces the introduction of the CUS400M medical and industrial certified AC-DC power supplies, packaged in the industry-standard 3” x 5” footprint. With forced air, the series can provide 400 W and 250 W can be supplied when convection cooled with a peak capability of up to 400 W. The duration period of that peak is up to 30 minutes (40°C ambient, 230 Vac input) with a maximum duty cycle of 50%, considerably longer than most products on the market. This makes the CUS400M ideal for applications with a relatively low quiescent power consumption and occasional peak demand, including hospital beds, dental chairs and incubators.

Initially, 12 V and 24 V outputs are available, with the release of 15 V, 19 V, 28 V, 36 V and 48 V models later in the year. All models accept an 85 to 264 Vac input and have a no-load power consumption of less than 1.3 W, when the output is inhibited. A 5 V 2 A or 12 V 1 A standby voltage, remote on/off, remote sense, AC fail and an output good signal are optional.

The series has a choice of mechanical configurations: open frame, baseplate, U-channel and enclosed versions are available now and a top-mounted fan version later in the year. To optimise cooling, the underside of the CUS400M circuit board is fitted into a thermally conductive, insulated plastic base (patent pending). This allows heat from the surface mounted power components to be dissipated into a cold plate or the system chassis. The overall size of the open frame model is 77.5 x 128 x 39.5 mm (W x L x H).

The medical and industrial safety certifications include IEC/EN/ES 60601‑1, IEC/EN/UL 62368‑1 and IEC/EN/UL 60950‑1 with CE 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 (Class I and II), and meet the EN 61000‑3‑2 harmonics, IEC 60601‑1‑2 Edition 4 and IEC 61000‑4 immunity standards.

The CUS400M has an input to output isolation of 4000 Vac (2 x MoPP), an input to ground isolation of 1500 Vac (1 x MoPP) and an output to ground isolation of 1500 Vac (1 x MoPP) for suitability in B and BF rated medical equipment. The leakage current is <250 µA and touch current is <100 µA. The maximum operating, transportation and storage altitude is 5000m, which supports global use and global sales of end-equipment.

For more information please contact Accutronics or visit the TDK-Lambda website.