Compact Switching Power SupplyMS2 series


Output Current 0.65 A, 12-V Type

[Discontinued model]

This model has been discontinued.

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Input conditions

Input voltage

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


47 to 63Hz*2


Input current (100/200 VAC)

0.28/0.16A or less

Efficiency (100/200 VAC)

Leakage current (100/200 VAC)

0.5/1mA or less

Rush current (100/200 VAC)

18, 36 A or less (with a +25°C 77°F cold start)

Output characteristics

Rated voltage


Variable voltage range

±5% (with V.ADJ)

Rated current


Ripple/noise voltage

2% (p-p) or less

Input fluctuation

0.5% or less

Load fluctuation

1.0% or less

Temperature fluctuation

Startup time

400ms or less

Output holding time

20 ms or more (100 to 240 VAC)


Overcurrent protection

Constant current drop method, automatic recovery, 0.79 A or more

Overvoltage protection



Display power

Power off memory time

Display resolution

Applicable standards

Safety standards

UL60950, CSA C22.2 number 60950, EN60950

EMC standard

FCC Part 15 B Class A, EN55011 Class A

Limits for harmonic current emissions



Parallel operation

Not possible

Series operation


Cooling method

Natural air cooling

Environmental resistance

Operating temperature range

-10 to 60°C 14 to 140°F, No freezing (see the derating characteristics)

Operating ambient humidity

25 to 85%RH (no condensation)

Ambient temperature for storage

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 VDC 1min (across output terminals and PE terminal)

Shock resistance

Peak acceleration: 300 m/s2, 2 times in each of the X, Y, and Z directions


10 to 57 Hz: 0.3 mm 0.01" double amplitude; 57 to 500 Hz: 19.6 m/s2 (2 G), cycle: 5.5 minutes; for 2 hours in each of the X, Y, and Z directions

Insulation resistance

100 MΩ or more at 500 VDC (between input and output, between input and FG, and between output and FG)


Approx 140 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 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.
*4 For the MS2-H100, this is applicable only when the load ratio is 70% or less.
*5 The applicable standards do not apply for parallel and serial operations.

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