Datasheet

DataSheet

30W, Dual Output

VER:01 Page 27 of 25 Issued Date：2009/06/22

Safety and Installation Instructions

Fusing Consideration

Caution:This converter is not internally fused.An input line fuse must always be used.

This encapsulated converter can be used in a wide variety of applications, ranging from simple stand-

alone

operation to an integrated part of a sophisticated power architecture. For

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 a maximumrating of 10A. Based on the information provided in this

data sheet

on i

nrush 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

TheMTBF of PXD30-xxWDxx series of DC/DC converters has beencalculated using:

Bellcore TR-NWT-000332Case I: 50%stress, Operating Temperature at 40°C ℃ (Ground fixed and controlled

environment). The resulting figure for MTBF is 3.163×10

hours.

MIL-HDBK 217F NOTICE2FULLLOAD, Operating Temperature at 25°C ℃. The resulting figure for MTBF is

4.347×10

hours.