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Martek Power has introduced a series of 120W DC/DC modules designed specifically for worldwide railway applications.

The CMS120 Series features a wide input voltage range, meets all relevant railway standards – including EN50 155 – and works across a broad operating temperature range without derating.

The CMS Series modules can be PCB mounted.

They are compact, measuring 92 x 45mm and just 20mm high – including an integral extruded aluminium heatsink.

PCB connection is by 1.5mm diameter pins.

According to Martek Power, the new modules can be easily integrated into a customer’s own power-supply design using a minimum of external components.

However, users can also use Martek Power to develop a custom power solution based around the CMS120 modules as ‘building blocks’.

Since the modules are available and already qualified to railway standards, this can provide a faster and more reliable route to market.

The new DC/DC modules accept a wide range of input voltages across two versions.

The low-input version has a range from 12 to 50.4V DC with nominal inputs of 24 and 36V DC.

The high-input version has a range from 43.2 to 154V DC with nominal inputs from 72 to 110V DC.

Output voltages are 12 and 24V.

Operating temperature range is -40C to +85C.

Under nominal conditions, the modules are 90 per cent efficient and incorporate over-voltage and short-circuit protection.

Martek Power designs and manufactures a wide range of standard and custom AC-DC power supplies, DC-DC power converters, DC-AC power inverters, EMI filters for Military, Aerospace, Medical, Railway, Automotive, Computing, Data storage, Telecom, Laser, Lamps, Networking, and many other industrial applications. Product output power ranges from 1 to 50,000 watts.


Martek Power has extensive expertise in design, engineering, and manufacturing, and are well versed with a variety of industries’ specific requirements and the most demanding quality needs. And, with our broad range of field proven standard power modules, we are capable of providing unique custom power solutions that meet special requirements of our customers worldwide in all market segments we serve.


Our power supplies are manufactured in our ISO 9001/ AS 9100 certified facilities in USA, France, U.K., U.S.A., Mexico, China and Tunisia. As a result, the products are of high quality and highly competitive in price.


It is Martek Power’s policy to design, manufacture and market high quality power supplies and power systems that meet or exceed customer expectations in quality, cost and delivery.


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