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AC-DC Power Supplies

AC-DC Power Supplies


NEW RANGE 2 x 4” 250W AC-DC Power Supplies

The compact CUS250M series of single output AC-DC power supplies are available initially with 12V and 24V outputs (15V, 18V, 24V, 28V, 36V and 48V to follow) in a compact industry standard 2 x 4 inch footprint and can deliver 250W with convection and conduction cooling. CUS250M can be used in both Class I and Class II (no earth wire) applications and offers efficiencies in excess of 94%. The very low earth leakage (<150uA) and touch current (<10uA for class I, <70uA for class II installations) values make it ideal for medical equipment applications. 

The standard open frame unit includes an integral metal baseplate and mechanical options include U channel format, U channel with cover and U channel with cover and top mounted cooling fan. 

Safety certifications include IEC/EN/ES 60601-1 and IEC/EN/UL 62368-1 with UK CA and CE marking for the Low Voltage, EMC and RoHS Directives. The units also comply with EN 55011-B and EN 55032-B conducted and radiated emissions, and meet the IEC60601-1-2 Edition 4 and IEC 61000-4 immunity standards. They are designed to meet the requirements of EN60335-1 and IEC61010-1.

Typical applications include medical (B and BF type), home healthcare, dental, test and measurement, broadcast, professional audio and industrial equipment.

Learn more about CUS250M 



  • Up to 250W Utilizing Convection and Conduction Cooling
  • Operation in Ambient Temperatures of up to 85°C
  • Medical Certifications (2 x MOPP)
  • Class B Conducted and Radiated EMI with Significant Margins
  • Suitable for Class I and Class II installations
  • Compact 2 x 4 x 1.56” / 50.8 x 101.6 x 39.5mm Size
  • Enclosure & Cooling Options
  • Very low earth leakage and touch current    
  • Less than 0.5W no load power consumption


Product Range Information

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Part number Power (W) Output info Construction Status Datasheet
CUS250M-12 250 12V / 20.83A
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CUS250M-15 250 15V / 16.66A
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CUS250M-18 250 18V / 13.88A
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CUS250M-24 250 24V / 10.41A
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CUS250M-28 250 28V / 8.92A
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CUS250M-36 250 36V / 6.94A
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CUS250M-48 250 48V / 5.2A
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CUS250M videos

Range Overview Video

Introducing CUS250M silent 250 watts medical power supply

Range Overview Video

CUS250M 2 x 4” 250W AC-DC Power Supplies overview video

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CUS250M Technical Downloads

CUS250M In the TDK-Lambda Newsroom

Compact 250W 2 x 4 inch medical and industrial power supplies can be conduction or convection cooled
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