Rugged power supplies for test and measurement, communications, medical, and broadcast offered by TDK Lambda

Dec. 2, 2019
Power supplies rated at to 2000 Watts, come with as many as 18 outputs, have means of patient protection (MoPPs) isolation, and low acoustic noise.

SAN DIEGO – TDK-Lambda Americas Inc. in San Diego is introducing the QM8B modular power supplies for medical, test and measurement, communications, and broadcast equipment applications.

These power supplies are rated at to 2000 Watts, and are available with as many as 18 outputs, means of patient protection (MoPPs) isolation, and low acoustic noise.

The device's medical and industrial safety certifications helps avoid the need for several power supplies in systems that require a large number of independent voltages.

Accepting 90 to 264 volts AC and 47 to 63 Hz input at 440 Hz with reduced PFC, the QM8B can deliver 1200 Watts at low-line and 2000 Watts with a high-line 180-264-volt AC input.

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With its modular construction, these power supplies can be configured with an on-line configurator to provide one to 18 independently regulated outputs and include individual output good signal and remote on/off functions.

The QM series module output voltages range from 2.8 volts to 105.6 volts and have output power levels from 300 Watts to 1200 Watts. A further subset of option modules provides an AC fail signal; standby voltages to 12 volts to 2A; global remote on/off; and PMBus communications.

Overall case dimensions for the rugged QM8B are 200 by 63.3 by 268 millimeters. The QM8B will operate in ambient temperatures of -20 to +70-degree Celsius, with output power and output current linearly derating above 50 C to 50 percent at 70 C.

With efficiencies of as much as 91 percent, less internal heat is generated allowing the use of low-speed cooling fans to reduce audible noise. A lower airflow speed also significantly reduces the ingress of dirt and other contaminants.

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The power supply has 4,000-volt AC input to output, 1,500-volt AC input to ground, and 1,500-volt AC output to ground isolation. All models are certified to the IEC/EN/UL/CSA 60601-1, ANSI/AAMI ES 60601-1 and IEC/EN/UL/CSA 60950-1 safety standards. The QM series also is designed to meet IEC/EN 61010-1 with CE marking for the Low voltage, EMC, and RoHS directives.

Earth leakage current is less than 300 microamps, and complies with the EN 61000-6-3:2007 and EN 60601-1-2:2015 (curve B conducted and radiated) emission standards.

The units also meet the EN 60601-1-2 4th edition and EN 61000-6-2 immunity standards and are designed and manufactured under the control of ISO9001 and ISO13485 (including risk management).

For more information contact TDK Lambda online at

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