UWR Series
3 Watt, Single Output DC/DC Converters
Input Fusing
E M I R A D I A T E D E M I S S I O N S
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For DATEL UWR 3
Watt DC/DC Converters, you should use slow-blow type fuses with values
no greater than the following:
If you’re designing with EMC in mind, please note that all of DATEL’s UWR
3 Watt DC/DC Converters have been characterized for radiated and con-
ducted emissions in our new EMI/EMC laboratory. Testing is conducted in an
EMCO 5305 GTEM test cell utilizing EMCO automated EMC test software.
Radiated emissions are tested to the limits of FCC Part 15, Class B and
CISPR 22 (EN 55022), Class B. Correlation to other specifications can be
supplied upon request. Radiated emissions plots to FCC and
V
IN Range
Fuse Value
1.5A
"D5"
"D12"
"D48"
1A
CISPR 22 for model UWR-12/250-D5 appear below. Published EMC test
reports are available for each model number. Contact DATEL’s Applications
Engineering Department for more details.
0.5A
UWR-12/250-D5 Radiated Emissions
FCC Part 15 Class B, 3 Meters
C U S T O M C A P A B I L I T I E S
Converter Output = 12Vdc @ 201mA
80
70
DATEL’s world-class design, development and manufacturing team stands
ready to work with you to deliver the exact power converter you need for
your demanding, large volume, OEM applications. And ... we’ll do it on time
and within budget!
60
FCC Class B Limit
50
40
30
20
Our experienced applications and design staffs; quick-turn prototype
capability; highly automated, SMT assembly facilities; and in-line SPC qual-
ity-control techniques combine to give us the unique ability to design and
deliver any quantity of power converters to the highest standards of quality
and reliability.
10
Radiated Emissions
0
–10
–20
We have compiled a large library of DC/DC designs that are currently used
in a variety of telecom, medical, computer, railway, aerospace and industrial
applications. We may already have the converter you need.
100
1000
Frequency (MHz)
Contact us. Our goal is to provide you the highest-quality, most cost-effec-
tive power converters available.
UWR-12/250-D5 Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = 12Vdc @ 201mA
80
70
60
50
40
30
20
10
0
EN 55022 Class B Limit
–10
–20
Radiated Emissions
100
1000
Frequency (MHz)
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2012 Murata Power Solutions, Inc.
www.murata-ps.com/support
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