Datasheet

Application Note
Created by Traco Electronic AG Arp. www.tracopower.com Date: January 4
th
, 2011 / Rev.: 1.4 / Page 44 / 44
20W, Single and Dual Output
Safety and Installation Instruction
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 normal-blow fuse with
maximum rating of 6A. 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 TEN 20-WIN series of DC/DC converters has been calculated according to:
Bellcore TR-NWT-000332 Case I: 50% stress, Operating Temperature at 40°C (Ground fixed and controlled environment). The
resulting figure for MTBF is 1’691’000 hours.
MIL-HDBK 217F NOTICE2 FULL LOAD, Operating Temperature at 25°C. The resulting figure for MTBF is 629’000 hours.