Compact Switching Power Supply

MS2 series

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This model has been discontinued.

Recommended Replaceable Products: Output Current 4.5 A, 100 W - MS2-H100

Output Current 4.5 A, 100 W MS-H100

MS-H100 - Output Current 4.5 A, 100 W




Input conditions

Input voltage

85 to 264 VAC (50/60 Hz), 120 to 340 VDC*1


47 to 63 Hz, DC*2


Input current (100/200 VAC)

1.6/0.9A or less

Power factor (100/200 VAC)

0.99, 0.95 (typ.) at maximum load

Efficiency (100/200 VAC)

76 to 81% typ.

Leakage current (100/200 VAC)

0.4/0.75mA or less

Rush current (100/200 VAC)

18, 36 A or less (with a +25°C cold start)

Output characteristics

Rated voltage


Variable voltage range


Rated current

Ripple/noise voltage

1% (p- p) or less

Input fluctuation

0.4% or less

Load fluctuation

0.7% or less

Startup time

1300/700ms or less (AC100/200V)*3

Output holding time

20 ms min. (100 to 240 VAC)


Overcurrent protection

5.3 A or more

Overvoltage protection



Display power

2-digit 7-segment LED (character height: 10 mm)

Power off memory time

Approx. 10 years (at 20°C)

Display resolution


Applicable standards

Safety standards

UL1950, UL1012, CSA C22.2 No.95095, EN60950, EN50178

EMC standard

FCC Part 15 B Class A, EN55011 Class A

Limits for harmonic current emissions


Environmental resistance

Insulation resistance

100 MΩ min. (with 500 VDC megohmmeter)
(across input and output terminals) (across input terminals and PE terminal)

Ambient temperature

-10 to +55 °C (No freezing) (See "Output conditions".)

Storage temperature

-20 to +70 °C (No freezing)

Relative humidity

25 to 85 % RH (No condensation)

Withstand voltage

3.0 kVAC, 50/60 Hz, 1 min (across input and output terminals)
2.0 kVAC, 50/60 Hz, 1min (across input terminals and PE terminal)
500 VAC, 50/60 Hz, 1min (across output terminals and PE terminal)

Vibration resistance

10 to 55 Hz, Double amplitude 1.5 mm or less, 2 hours in each of the X, Y, and Z directions
(1 G when attached to a DIN rail)

Shock resistance

300 m/s2, 2 times for each direction of 3 axes


Approx. 560 g

*1 When applying for safety standards are 100 to 240 VAC, 50/60 Hz.
*2 The rated input voltage and rated frequency when applying for safety standards are 100 to 240 VAC, 50/60 Hz.
*3 Defined with a rated input voltage of 100 VAC or 200 VAC at 100% load.
*4 The H Series is a cutoff type. To return, turn OFF the input power supply and after leaving it off for 1 minute or more, plug in the input power supply again. The E/F Series is a Zener diode clamp type. It will not restart after the protection circuit operation.

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