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          7. Output Current 4.5 A, 100 W

          Compact Switching Power SupplyMS2 series

          Output Current 4.5 A, 100 W



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          Input conditions

          Input voltage

          85 to 264 VAC, 110 to 370 VDC*1


          47 to 63 Hz, DC*1


          Input current (100/200 VAC)

          2.1/1.3A or less

          Efficiency (100/200 VAC)

          82/85% typ. (with 100% load)

          Leakage current (100/200 VAC)

          0.4/0.75 mA max. (with 100% load)

          Rush current (100/200 VAC)

          25/50 A max. (with 100% load, at 25°C cold start)

          Output characteristics

          Rated voltage


          Variable voltage range

          ±5% (with V.ADJ)

          Rated current


          Ripple/noise voltage

          180mV (p-p) or less

          Input fluctuation

          0.4% or less

          Load fluctuation

          1.5% or less

          Temperature fluctuation

          0.02 %/ ºC max.

          Startup time

          500 ms max. (at Surrounding Air Temperature of 0 to 55°C under I/O rated conditions)

          Output holding time

          20 ms min. (at Surrounding Air Temperature of 25°C under I/O rated conditions)


          Overcurrent protection

          Activates when the current reaches 125% or more of the rated output current. Constant current voltage limiting. Automatic reset 5.3 A min.

          Overvoltage protection

          Activates when the voltage reaches 26.4 V or more. Voltage turn-off. Operation resumes when the input power isturned on again.*2


          Display power

          3-digit, 7-segment LED (Character height: 10 mm)

          Power off memory time

          Approx. 10 years (at 20°C)

          Display resolution

          0.1A/0.4V /1%

          Applicable standards

          Safety standards

          UL508, UL60950-1
          CSA C22.2 No.14, CSA C22.2 No.60950-1
          EN60950-1, EN50178

          EMC standard

          FCC Part15B Class A, EN55011 Class A, EN61000-6-2

          Limits for harmonic current emissions



          Parallel operation

          Possible (OP-42207 is required.)*4

          Series operation

          Possible (External diode is required.)*4

          Cooling method

          Natural air-cooling

          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 57 Hz, Double amplitude 0.3 mm, 57 to 500 Hz, 19.6 m/s2 (2 G), 5.5-minute cycle, 2 hours in each of the X, Y, and Z directions

          Shock resistance

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


          Approx. 490 g

          *1 The rated input voltage and rated frequency when applying for safety standards are 100 to 240 VAC, 50/60 Hz.
          *2 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.
          *3 For the MS2-H100, this is applicable only when the load ratio is 70% or lower.
          *4 The applicable standards do not apply for parallel and serial operations.

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