Medical Power Supplies operate with or without forced air.

Press Release Summary:

Featuring 2 x 4 in. footprint, ZMS100 Series operates from universal input of 85~264 Vac and provides 12, 15, 24, 36, or 48 V outputs. User adjustment of -5/+10% accommodates non-standard voltages. Power supplies deliver 80 W output power convection cooled or 100 W with 0.7 m/s airflow at 50°C ambient. Offering 90% efficiency, units conform to IEC60601-1 3rd edition medical standard, have EN61000-3-2 compliance, and are suitable for Class I or Class II applications.

Original Press Release:

Medical 100W 2 x 4" Power Supplies Have Long Capacitor Life

TDK Corporation announces the introduction of TDK-Lambda’s ZMS100 2 x 4” medical and ITE certified power supplies.  Designed to provide long field life in hospital, clinical, dental and home based medical applications as well as professional broadcast, test, measurement and audio equipment, the ZMS100 series can operate with or without forced air cooling.

Meticulous design has maximized electrolytic capacitor lifetime, reducing output capacitor ripple current (which causes internal heating) and ensuring good airflow around components.  Furthermore, a long-life ceramic is used as the start-up capacitor, eliminating the commonly used electrolytic type – a known failure point in the industry.

Carrying a 3-year warranty, the TDK-Lambda ZMS100 is currently available with 12V, 15V, 24V, 36V or 48V outputs, with a planned 28V model to be launched in early 2015.  User adjustment of -5/+10% accommodates non-standard voltages.  The series can reliably provide up to 80W output power convection cooled, or 100W with just 0.7m/s airflow at 50oC ambient (70oC maximum with appropriate de-rating).

The supplies operate from a universal input of 85~264Vac, have EN61000-3-2 compliance and are suitable for Class I or Class II (no ground connection) applications.  Typical efficiencies are 90%, and with an average efficiency rating of 87%, the ZMS100 meets ErP guidelines.  Off load power consumption is less than 0.5W.

The ZMS100 conforms to the new IEC60601-1 3rd edition medical standard with 4kVac input to output isolation (2 x MOPPs) and 1.5kVac (1 x MOPP) between input to ground and output to ground.  Touch current is less than 100µA.  The series has also been certified to ANSI/AAMI ES60601-1, EN60601-1, IEC/EN/UL60950-1 and carries the CE mark according to the LV and RoHS2 Directives.  All models meet EN55011-B, FCC Class B conducted emissions and EN60601-1-2 immunity standards.

More information can be obtained at the following TDK-Lambda Americas website,, or by calling 800-LAMBDA-4.  Product availability for the ZMS100 series can be found via the link to TDK-Lambda’s distributor network (see “Check Distributor Stock to Buy”) at

Major applications

• Medical, test and measurement, broadcast and audio applications

Main features and benefits

• Industry standard 2 x 4” footprint

• 80W convection or 100W forced air cooled

• Low off-load power consumption

• Long capacitor life

• Suitable for Class I and Class II applications

Major specifications








Input voltage range


85 to 264Vac

Output voltage







Output current
(Forced Air)







Output power


80W convection, 100W with forced air

Operating temperature


-20 to +70°C. (De-rate linearly to 50% load from 50 to 70°C)



IEC/EN/UL 60950-1, IEC/EN 60601-1, ES 60601-1, CE Mark

Size (W x D x H)


2 x 4 x 1.26”



Three Years


About TDK Corporation

TDK Corporation is a leading electronics company based in Tokyo, Japan. It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK's portfolio includes electronic components, modules and systems* which are marketed under the product brands TDK and EPCOS, power supplies, magnetic application products as well as energy devices, flash memory application devices, and others. TDK focuses on demanding markets in the areas of information and communication technology and consumer, automotive and industrial electronics. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2014, TDK posted total sales of USD 9.6 billion and employed about 83,000 people worldwide.

* The product portfolio includes ceramic, aluminum electrolytic and film capacitors, ferrites, inductors, high-frequency components such as surface acoustic wave (SAW) filter products and modules, piezo and protection components, and sensors.

About TDK-Lambda Corporation

TDK-Lambda Corporation, a group company of TDK Corporation, is a leading global power supply company providing highly reliable power supplies for industrial equipment worldwide. TDK-Lambda Corporation meets the various needs of customers with our entire range of activities, from research and development through to manufacturing, sales, and service with bases in five key areas, covering Japan, Europe, America, China, and Asia.

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Contacts for regional media


Tom Tillman

TDK-Lambda Americas

(619) 575 4400

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