NMS Series

6kVDC Isolated 2W Dual Output DC-DC Converters

KDC_NMS.K01 Page 2 of 4

www.murata.com

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 specified 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 recognised by Underwriters 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 specified test voltage.

RoHS COMPLIANCE INFORMATION

This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300ºC for 10 seconds. Please refer to application

notes for further information. The pin termination finish on this product series is Matte Tin over Nickel Preplate. The series is backward compatible

with Sn/Pb soldering systems. For further information, please visit www.murata.com/en-global/products/power/rohs

TEMPERATURE DERATING GRAPH

TOLERANCE ENVELOPE

10%

Output Load Current (%)

5%

-7.5%

-2.5%

2.5%

Typical

Load

Line

0

100

75

50

25

10

80

60

40

20

0

0

1.0

2.0

3.0

Safe Operating Area

70°C

Ambient Temperature (°C)

SAFETY APPROVAL

The NMS series has been recognised

by Underwriters Laboratory (UL) to UL1950

for supplementary insulation up to 300Vrms

and reinforced insulation up to 150Vrms

working voltage.

File number E151252 applies.

ABSOLUTE MAXIMUM RATINGS

Short-circuit protection1

1 second

Wave Solder

Wave Solder profile not to exceed the profile recommended in IEC 61760-1 Section 6.1.3.

Please refer to application notes for further information.

Lead temperature 1.5mm from case for 10 seconds

300°C

Internal power dissipation

900mW

Input voltage VIN, NMS05 types

7V

Input voltage VIN, NMS12 types

15V

1. Supply voltage must be disconnected at the end of the short circuit duration.