Datasheet

Application Note
Created by Traco Electronic AG Arp.
www.tracopower.com
Date: September 24
th
, 2018 / Rev.: 1.5 /
Page 23 / 23
2W, Single and Dual Output
Safety and Installation Instruction
Isolation consideration
The TMR series features 1.0k Volt DC isolation for 60 seconds from input to output, input to case, and output to case. The input to output
resistance is greater than 10
9
ohms. Nevertheless, if the system using the TMR converter needs to get safety agency approval, certain rules must
be followed in the design of the system. 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 22.2-60950, although specific applications may have other or additional
requirements.
Fusing Consideration
Caution: The TMR converter 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 a 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 6.3 A. Based on the information provided in this data sheet on maximum dc input
current, the same type of fuse with lower rating can be used.
Minimum Load Requirement
No minimum load required.
MTBF and Reliability
The MTBF of TMR series has been calculated according to:
1. MIL-HDBK-217F under the following conditions:
Nominal Input Voltage and GB
I
out
= I
out max
T
A
= +25°C
The resulting figure for MTBF is 2.399× 10
6
hours.
2. Bell-core TR-NWT-000332 Case I:
50% stress, Operating Temperature at 40 ℃ (Ground fixed and controlled environment)
The resulting figure for MTBF is 5.107× 10
6
hours.