Market Overview

Emerson Network Power Announces NPT42-M Compact, Triple-Output 45 Watt Power Supply with Medical and IT Equipment Safety Approvals


From an industry standard 2 x 4 inch footprint, the NPT42-M can deliver up to 55 watts with forced air cooling; it can accommodate operating temperatures as high as 80 degrees Celsius with de-rating; and it is ideal for a wide range of light industrial, instrumentation and process systems, as well as low-power dental and laboratory equipment.

Carlsbad, CA (PRWEB) October 27, 2011

Emerson Network Power, a business of Emerson and the global leader in enabling Business-Critical Continuity™, today announced the NPT42-M triple-output open-frame ac-dc power supply. The NPT42-M can deliver up to 45 watts with convection cooling and up to 55 watts with forced air cooling. It can accommodate operating temperatures from minus 20 to 50 degrees Celsius at full power and as high as 80 degrees Celsius with de-rating. Carrying a comprehensive set of worldwide IT equipment (ITE) and non-patient contact and non-patient critical medical safety approvals, the NPT42-M is suitable for a wide range of light industrial, instrumentation and process systems, as well as low-power dental and laboratory equipment. Featuring an industry standard 2 x 4 inch (51 x 102 mm) footprint, the power supply has a height of just 1 inch (25 mm), making it ideal for 1U high portable and rack-mounting equipment.

Emerson Network Power's new NPT42-M has a wide-range universal input capable of accommodating any ac voltage in the range 90 to 264 Vac, at any frequency from 47 to 440 Hz. It can also operate from any dc input in the range 127 to 300 Vdc, enabling it to be used virtually anywhere in the world. The NPT42-M power supply requires less than 74 W of input power, and inrush current is less than 50 A peak at 230 Vac input.

The power supply provides a triple output of +5 V, +12 V and -12 V. The main +5V output can deliver 5 A continuously with standard convection cooling, and up to 8 A with forced air cooling. The auxiliary +12 V and -12 V outputs can supply 2.5 A and 0.5 A respectively, increasing to 3 A and 0.7 A with forced air cooling. All three outputs are tightly regulated; the 5 V output is maintained to within plus or minus 2 percent for all normal line and load conditions, and has a maximum ripple of 50 mV peak-to-peak. Both 12 V outputs are regulated to within plus or minus 5 percent.

Emerson Network Power's NPT42-M power supply fully complies with the international EN 61000-3-2 standard for harmonic emissions. It features built-in EMI filters (CISPR 22 Class B) and meet rigorous international EMC standards, including FCC Class B, EN 55022 class B and VDE 0878PT3 Class B for conducted noise. Key safety design aspects include fuses in both the line and neutral connections, and a safety-ground leakage current which does not exceed 275 µA. Safety approvals include TUV/UL/CSA 60950 and 60601-1, CB certificate, CE mark (LVD) and CQC mark.

All three outputs on Emerson Network Power's NPT42-M power supply are fully protected against short-circuit conditions. The main +5V output is also protected against overvoltage conditions, and primary-side total power monitoring protects the overall power supply against overload. The power supply delivers a very high demonstrated mean time between failures (MTBF) of 550,000 hours at full load and under 25 degrees Celsius ambient operating conditions.

An optional LPX50 enclosure kit is available for applications that require the power supply to have maximum component protection.

Emerson Network Power's NPT42-M triple-output power supply is very competitively priced at $26 per unit in production quantities and is available now. For more information, please see the NPT42-M websheet.

A high resolution photo of the new NPT42-M is available.

For more information on power supplies by Emerson Network Power, visit

About Emerson Network Power
Emerson Network Power, a business of Emerson, is the global leader in enabling Business-Critical Continuity™ from grid to chip for telecommunication networks, data centers, health care and industrial facilities. Emerson Network Power provides innovative solutions and expertise in areas including AC and DC power and precision cooling systems, embedded computing and power, integrated racks and enclosures, power switching and controls, infrastructure management, and connectivity. All solutions are supported globally by local Emerson Network Power service technicians. For more information on Emerson Network Power's embedded power products and services for original equipment manufacturers and system integrators visit Learn more about Emerson Network Power products and services at

About Emerson
Emerson, based in St. Louis, Missouri (USA), is a global leader in bringing technology and engineering together to provide innovative solutions for customers in industrial, commercial, and consumer markets through its network power, process management, industrial automation, climate technologies, and tools and storage businesses. Sales in fiscal 2010 were $21 billion. For more information, visit


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