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NMS Series
6kVDC Isolated 2W Dual Output DC/DC Converters
TEMPERATURE CHARACTERISTICS
Parameter
Speci?cation
Storage
Conditions
All output types
Min.
0
-50
Typ.
Max.
70
130
Units
°C
Case Temperature above ambient
Cooling
All output types
Free air convection
32
TEMPERATURE DERATING GRAPH
3.0
TOLERANCE ENVELOPE
+10%
SAFETY APPROVAL
The NMS series has been recognised
2.0
70°C
+5%
V NOM
Typical
L
o ad L ine
+2.5%
-2.5%
by Underwriters Laboratory (UL) to UL 60950
for supplementary insulation up to 300Vrms
1.0
Safe Operating Area
-7.5%
and reinforced insulation up to 150Vrms
working voltage.
File number E151252 applies.
0
0
20
40
60
80
10
25
50
75
100
Ambient Temperature (°C)
Output Load Current (%)
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test
voltage, applied for a speci?ed time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NMS series of dc/dc converters are all 100% production tested at their stated isolation voltage. This is 6kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The NMS series has been recognized by Underwiters Laboratory to a working voltage of 300Vrms for Supplementary Insulation system and 150Vrms for Reinforced
Insulation systems.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on
materials, construction and environment. We therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be
reduced by 20% from speci?ed test voltage.
www.murata-ps.com/support
KDC_NMS.G04 Page 2 of 3
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