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TDK-Lambda’s CSS65 series of compact, single-output power supplies has been designed specifically for medical applications.

With 4kV AC reinforced input-to-output isolation and input-to-ground isolation of 1,500V AC, all CSS65 models meet the applicable safety requirements of UL/EN/IEC60601-1, making them suitable for use in medical devices with applied part rating B.

Offered in an industry standard 2 x 4in footprint, with a profile height of 30mm including underside components, the open-frame CSS65 power supplies come with dual fused universal AC input and can deliver up to 65W at 50C under convection cooling.

Worst-case leakage current is less than 250uA at 264V AC/60Hz, complying with worldwide medical equipment requirements.

The CSS65 series covers all commonly used output voltages from 5 to 48V with over 87 per cent efficiency.

The models are rated for operation in a convection-cooled environment from 0 to 70C, with appropriate derating.

Remote sense connections are provided to compensate for cable drops between the output terminals and the load.

Other standard features include continuous short-circuit protection and over-voltage protection with automatic reset.

TDK-Lambda’s CSS65 series meets conducted and radiated EMC requirements of EN55011-B and FCC Class B (without additional filtering or components) and EN60601-1-2 immunity specifications for greater reliability.

All models in the CSS65 series carry the CE mark, according to the LV Directive, and come with a two-year warranty.

TDK-Lambda is a subsidiary of the TDK Corporation, a leading global electronics company (

TDK-Lambda has been a major provider of power supplies for over 60 years.  The company designs and manufactures a wide range of AC-DC Power Supplies and DC-DC Converters for Industrial, Medical, Telecom, Datacom, and Test & Measurement applications worldwide.

With production facilities in Asia, America and EMEA, TDK-Lambda has positioned itself as one of the world’s largest manufacturers of power conversion products with recognized leadership in the
industrial market segment.

With our comprehensive 1.5W to 90kW range of AC/DC power supplies, DC/DC converters, Programmable DC power supplies and EMI noise filters, TDK-Lambda offers the right solution for a wide spectrum of applications.

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