Datasheet
TEP 75WI Series
Page 69 of 69
Rev. June 13. 2013
Application Note
Specifications can be changed without notice! Make sure you are using the latest documentation, downloadable at www.tracopower.com
www.tracopower.com
Safety and Installation Instruction
The TEP 75WI series has built in the protection function of the polarity reverse as the following gure.
Fusing Consideration
Caution: This power module is not internally fused. An input line fuse must always be used.
This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone operation to an
integrated part of sophisticated power architecture. To maximum exibility, internal fusing is not included, however, to achieve
maximum safety and system protection, always use an input line fuse. The safety agencies require a slow-blow fuse with maximum
rating of 15A for TEP 75-24xxWI, 8A for TEP 75-48xxWWI and 3.5A for TEP 75-72xxWI. Based on the information provided in this
data sheet on Inrush energy and maximum dc input current, the same type of fuse with lower rating can be used. Refer to the fuse
manufacturer’s data for further information.
MTBF and Reliability
The MTBF of TEP 75WI series DC/DC converters has been calculated using
Bellcore TR-NWT-000332 Case I: 50% stress, Operating Temperature at 40C° (Ground xed and controlled environment ). The
resulting gure for MTBF is 1.010×10
6
hours.
MIL-HDBK 217F NOTICE2 FULL LOAD, Operating Temperature at 25C°. The resulting gure for MTBF is 7.416×10
4
hours.