Datasheet

Application Note
Created by Traco Electronic AG Arp. www.tracopower.com Date: July 28
th
, 2009 / Rev.: 1.0 / Page 32 / 32
150W Single Output
Safety and Installation Instruction
The TEP 150 Series has built in the protection function of the polarity reverse as the following figure.
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 flexibility, 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 30A for TEP 150–24xxWI and 15A for TEP 150–48xxWI. Based on the information provided in this
datasheet 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 150 series of DC/DC converters has been calculated using
Bellcore TR-NWT-000332 Case 1: 50% stress, Operating Temperature at 40°C. The resulting figure for MTBF is 1’525’000
hours.
MIL-HDBK 217F Notice2 Full Load, Operating Temperature at 40°C, Air Flow = 400LFM (Ground, Benign, controlled
environment ) The resulting figure for MTBF is 135’300 hours.