Datasheet

DataSheet

30W, Single Output

VER:00 Page 46 of 46 Issued Date：2009/03/02

Safety and Installation Instruction

Fusing Consideration

Caution: This converterisnotinternally 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 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 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 PXE30-xxWSxx DC/DC converter hasbeen calculated using

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

environment ). The resulting figure for MTBFis 1.315×10

hours.

MIL-HDBK-217F NOTICE2 FULL LOAD, Operating Temperature at 25°C ℃. The resulting figure for MTBF is

3.456×10

hours.