MGJ1 Series
5.7kVDC Isolated 1W SM Gate Drive DC/DC Converters
KDC_MGJ1_A05 Page 6 of 18
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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 MGJ1 series of DC/DC converters are all 100% production tested at 5.7kVDC for 3 second and have been qualification tested at 5.7kVDC for 1
minute.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
When the insulation in the MGJ1 series is not used as a safety barrier , i.e. provides functional isolation only, continuous or switched voltages across the barrier up to
3kV are sustainable. Long term reliability testing at these voltages continues. Peak Inception voltages measured were in excess of 3kV when testing for partial dis-
charge in accordance with IEC 60270. Please contact Murata for further information.
The MGJ1 series is pending recognition by Underwiters Laboratory to 250 Vrms Reinforced Insulation, please see safety approval section below.
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.
SAFETY APPROVAL
ANSI/AAMI ES60601-1
The MGJ1 series is pending recognition by Underwriters Laboratory (UL) to ANSI/AAMI ES60601-1 and provides 2 MOPP (Means Of Operator Protection) based upon a
working voltage of 250 Vrms max, between Primary and Secondary.
UL 60950
The MGJ1 series is pending recognition by Underwriters Laboratory (UL) to UL 60950 for reinforced insulation to a working voltage of 250Vrms with a maximum mea-
sured product operating temperature of 105°C.
Creepage and clearance 9.3mm.
FUSING
The MGJ1 Series of converters are not internally fused so to meet the requirements of UL an anti-surge input line fuse should always be used with ratings as defined
below.
Input Voltage, 5V 600mA
Input Voltage, 12V 250mA
Input Voltage, 15V 200mA
Input Voltage, 24V 125mA
All fuses should be Anti-Surge and UL rated.
RoHS COMPLIANCE AND MSL INFORMATION
This series is compatible with Pb-Free soldering systems and is also backward compatible with Sn/Pb soldering systems.
The MGJ1 series can be soldered in accordance with J-STD-020 and have a classification temperature of 260°C and
moisture sensitivity level 2. The termination finish on this product is Gold with plating thickness 0.12 microns.
