Home › ProductsAC-DC Power SuppliesOpen Frame / Chassis MountMAH450



  • Very high power density 3 x 5”
  • 320W Convection / 350W Conduction / 450W Fan cooled
  • Medical safety IEC 60601-1 (BF rated) and EMC Immunity EN60601-1-2 4th ed
  • Open frame, Covered, Top fan and End fan versions
  • Power good, Remote on off and ±8% Voltage adjust
  • EN55011 Level B conducted & level A radiated
  • 5 Year warranty

Product Description

The MAH450 series of compact open frame AC-DC PSUs provide 320W convection, 350W conduction and 450W fan cooled power from a 3” x 5” package. The range is approved for use in both IT and medical applications and is available in 12-53V units. The units are fully featured with power good, remote on off and voltage adjust. They are available in four variants; open frame, enclosed, top fan and end fan. All units come with a FiDUS 5 year warranty.

Contact us on 01183 420730 or sales@fiduspower.com to confirm stock levels, leadtimes and further prices.

Part numbers
Find out more


MAH: 3 x 5 x 1.58” (76.2 x 127 x 40.1mm), MEH: 3.41 x 5 x 1.97” (86.6 x 127 x 50mm), MEH –F1/Y1: 3.41 x 5 x 1.97” (86.6 x 127 x 50mm), MEH –F2/Y2: 3.15 x 5.83 x 1.6” (80 x 148.2 x 40.6mm)

Input Voltage

85 to 264 VAC

No Load Input Power

< 0.8 W

Harmonic Currents

EN61000-3-2 Class A


Up to 94%

Operating Temp

-40 to +85°C, see datasheet for derating curve


Input to Output - 4000VAC

Input to Ground - 2500VAC

Output to Ground - 2500VAC

European Safety Approvals

EN 60950-1: 2nd edition, EN 62368-1, EN 60601-1: 3.1 edition

US Safety Approvals

UL 60950-1: 2nd edition, UL 62368-1, ANSI/AAMI/ 60601-1: 3.1 edition

Other Safety Approvals

IEC 60950-1: 2nd edition, IEC 62368-1, IEC 60601-1: 3.1 edition


Conducted - EN55011/32 Level B

Radiated - EN55011/32 Level A

Safety Approvals

MAH450 DoC MAH450 DoC (160 KB)

3D Models

T/MAH450 3D PDF T/MAH450 3D PDF (8521 KB)

T/MAH450 3D STP T/MAH450 3D STP (19092 KB)

T/MAH450 F1 3D PDF T/MAH450 F1 3D PDF (10298 KB)

T/MAH450 F2 3D PDF T/MAH450 F2 3D PDF (10111 KB)

T/MEH450 3D PDF T/MEH450 3D PDF (9395 KB)

T/MEH450 3D STP T/MEH450 3D STP (27674 KB)

T/MEH450 -F1 3D STP T/MEH450 -F1 3D STP (29477 KB)

T/MEH450 F2 3D STP T/MEH450 F2 3D STP (27123 KB)

Require a modified standard part?

Based on your specific requirements, our AC-DC power supplies, DC-DC converters and medical grade power supplies can be supplied with variations to input/output parameters and non-standard connections to meet the needs of your application.

Can’t find what you are looking for? Call us 01183 420730 or

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