1500W Industrial/Medical Power Supplies Feature Low Noise


TDK Lambda launched new modular power supplies, rated from 1,200 to 1,500W, with full MoPP isolation. The QM7F series of AC/DC power supplies, says the company, also have the lowest acoustic noise available at that power level.

Having both medical and industrial safety certifications, the supplies are ideal for a range of applications, including BF-rated medical equipment, test and measurement, broadcast, communications and renewable energy applications.

The supplies can deliver 1,200W with input of 90 to 264V AC (47 to 440Hz), and 1,500W with a 150 to 264V AC input. Up to 16 outputs can be provided with voltages ranging from 2.8 to 52.8V. The company also plans to add higher voltages later.

Power ratings start from 35W, with single or dual outputs, to 1,200W single output. Operating temperatures are specified from -20 to +70 degree C. Output power and output current derating is 2.5 per cent per degree C above 50 degree C.


Operating efficiency is up to 91 per cent, allowing the use of low speed cooling fans which reduces audible noise to just 44.3dBA at room temperature and 45.3dBA at 50 degree C, measured in accordance with BS EN ISO 3744:2010. As less ingress of dirt and contaminants is drawn into the power supply than those with traditional high-speed fans, greater reliability can be realised.

The units are certified to IEC/EN/UL/CSA 60601-1, ANSI/AAMI ES 60601-1, IEC/EN/UL/CSA 60950-1 and designed to meet IEC/EN61010-1 with CE marking for the Low Voltage and RoHS2 Directives. Input to output isolation is 4,000V AC (two MoPPs), 1,500V AC input to ground (one MoPP) and 1,500V AC (one MoPP) output to ground.

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Maximum earth leakage current is 300microA, while still complying with the EN61000-6-3:2007 and EN60601-1-2:2015 (curve B conducted and radiated) emission standards. The units also meet the EN60601-1-2 and EN61000-6-2 immunity standards and are designed and manufactured under the control of ISO9001 and ISO13485 (including risk management).

The units are supplied in compact overall case dimensions of 176 x 63.3 x 270mm and weight between 2.6 and 3.1kg, depending on the configuration. The series comes with a seven-year warranty.

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