Meanwell RD125A (5V, 12V) 125W Dual Output Switching Power Supply

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RD-125A series is a 125W Dual-output enclosed type power supply with 38mm of low profile design. The AC input is 88 ~ 132VAC / 176 ~ 264VAC (selected by switch) which could be directly supplied from the house supplied voltage. The output Voltages from SMPS will be +5V, +12V. The SMPS has high efficiency up to 82%, the design is of metallic mesh case which enhances the heat dissipation of RD-125A that the whole series operates from -25°C through +70°C. RD-125A has complete protection functions and 5G antivibration capability; it complies with international safety regulations such as UL62368-1, TUV EN62368-1. RD-125A series can be used for many purposes with the best performance from it.


Pin No. Pin name Description
1,2 AC/L&N Supplied AC Voltage 
4,6 COM Negative for DC Outputs
5 V2(+V) DC OUTPUT +12V
7 V1(+5V) DC OUTPUT +5V



  • Universal AC input/ Full range
  • Protections: Short circuit/ Overload / Over voltage
  • Cooling by free air convection
  • LED indicator for power on
  • 100% full load burn-in test
  • All using 105°C long life electrolytic capacitors
  • Withstand 300VAC surge input for 5-second
  • High operating temperature up to 70°C
  • Withstand 5G vibration test
  • High efficiency, long life and high reliability


  • Industrial automation machinery
  • Industrial control system
  • Mechanical and electrical equipment
  • Electronic instruments, equipment or apparatus
  • Household appliances
Model RD-125A
Brand Meanwell
DC Voltage (through two voltage channel) +5V(V1) , +12V(V2) 
Rated Current V1-7.7A, V2-7.7A
Rated Power 130.9W
Ripple & Noise V1-80mVp-p , V2-120mVp-p
Voltage Adj. Range CH1(V1): 4.75 ~ 5.5V
Voltage Tolerance V1- ±5.0% , V2- ±7.0% 
Line Regulation V1- ±1.0% , V2- ±2.0% 
Load Regulation V1- ±3.0% , V2- ±4.0% 
Setup, Rise Time 500ms, 20ms/230VAC        1200ms, 30ms/115VAC at full load
Hold Up Time 25ms/230VAC          30ms/115VAC at full load
Input Voltage Range 88 ~ 132VAC / 176 ~ 264VAC selected by switch           248 ~ 373VDC(Withstand 300VAC surge for 5sec. Without damage)
Frequency Range 47 ~ 63Hz
Efficiency 82%
AC Current 3A/115VAC            2A/230VAC
Over Load

110 ~ 150% rated output power

Protection type : Hiccup mode, recovers automatically after fault condition is removed

    Working Temperature -25°C to 70°C
    Working Humidity 20~90% RH
    Dimensions(L*W*H) 199*98*38mm 
    Country of Origin China

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