JF48S3.3-3500 Datasheet, PDF (14/15 Pages) Wall Industries,Inc. – DC/DC Converter

TECHNICAL DATASHEET
JF48S3.3-3500
Safety and Installation Instruction:
Isolation Consideration
The JF Series features 2250 Volt DC isolation from input to output. The input to output resistance is greater than
10MΩ. Nevertheless, if the system using the power module needs to receive safety agency approval, certain
rules must be followed in the design of the system using the model. In particular, all of the creepage and
clearance requirements of the end-use safety requirement must be observed. These documents include UL60950-
1, EN60950-1 and CSA 22.2-960, although specific applications may have other or additional requirements.
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 2A. 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 the JF Series of DC/DC converters has been calculated using Bellcore TR-NWT-000332 Case I:
50% stress, Operating Temperature at 40°C (Ground fixed and controlled environment). The resulting figure for
MTBF is 2.2× 10⁶ hours.
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