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Quick Details

  • Place of Origin: Zhejiang, China (Mainland)
  • Brand Name: Steady
  • Model Number: S-400-48
  • Output Power: 400W
  • Output Type: Single
  • Input Voltage: 90~132VAC/180~264VAC selected by switch or 254~370VDC
  • Output Voltage: 48VDC
  • Output Frequency: 47-63HZ
  • Output Current: 8.3A
  • Product Name: 48v dc switching power supply
  • Certification: CE
  • Guarantee: 1~ 2 years
  • Case material: Aluminium
  • Dimension: 215*115*50mm (L*W*H)
  • G.W: 0.95kg
  • Efficiency: 81%MIN

Packaging & Delivery

Packaging Details: it is packed by vacuum plastic bag to provent moisture and then put into the inner box, 20 pcs to a neutral carton.
Delivery Detail: within 7 days after deposit confirmed
Company Profile







• Non-PFC, complete protections 
• Economical medium to high power models with safety certificate

High number of economic type safety with series

3.3V, 5V, 7.5V, 9V, 12V, 15V, 24V, 27V,36V, 48V














Yueqing shidandi Electric Co., Ltd. is a high-tech enterprise which is engaged in the design, development, production switching power series products. 


The payment terms which we accept  L/C  T/T westion union and paypal !

We accept OEM and Sample order,MOQ IS 1PC .
Product Description



Features :


 Universal AC input / Full range

• Protections:Short circuit/Over load/Over voltage
• Forced air cooling by built-in DC fan
• PWM control and regulated
• Built-in cooling Fan ON-OFF control
• 100% full load burn-in test
• Fixed switching frequency at 25KHz

Model S-400-5S-400-7.5S-400-12S-400-13.5S-400-15S-400-24S-400-27S-400-48
OutputDC Voltage5V7.5V12V13.5V15V24V27V48V
Rated Current80A53A33A29.6A26.6A16.6A14A8.3A
Current Range0 ~ 80A0 ~ 53A0 ~ 33A0 ~ 29.6A0 ~ 26.6A0 ~ 16.6A0 ~ 14A0 ~ 8.3A
Rated Power400W397W396W399.6W399W398.4W378W398.4W
Ripple & Noise (max.) Note.2150mVp-p150mVp-p150mVp-p150mVp-p150mVp-p150mVp-p200mVp-p240mVp-p
Voltage Adj. Range4.5 ~ 5.6V6~9V 10~13.2V12 ~ 15V13.5~18V20~26.4V26 ~ 32V41 ~ 56V
Voltage Tolerance Note.3±2.0%±2.0%  ±1.0%±1.0%±1.0%±1.0%±1.0%±1.0%
Line Regulation±0.5%±0.5%  ±0.5%±0.5%±0.5%±0.5%±0.5%±0.5%
Load Regulation±1.0%±1.0%  ±0.5%±0.5%±0.5%±0.5%±0.5%±0.5%
Setup,Rise, Hold time200ms, 50ms, 20ms at full load
InputVoltage Range90 ~ 132VAC / 180 ~ 264VAC by switch          254 ~ 370VDC       
Frequency Range47~63HZ
Efficiency(Typ.)73%76% 74%79%78%81%82%83%
AC Current6.5A/115VAC          4A/230VAC
Inrush Current (max.)50A/115VAC          50A/230VAC
Leakage Current<3.5mA / 240VAC
ProtectionOver Load105 ~ 135% rated output power
Protection type : Hiccup mode, recovers automatically after fault condition is removed
Over Voltage5.75 ~ 6.75V9.4 ~ 10.9V13.8V~16.2V15.5 ~ 18.2V18V~21V27.6V~32.4V33.7 ~ 39.2V57.6 ~ 67.2V
Protection type : Hiccup mode, recovers automatically after fault condition is removed
FunctionFan on/ off Control  RTH3 ≥55°c FAN ON,  ≤45°c FAN OFF, ≥80°c output shutdown (5 ~ 7.5V)  
RTH3 ≥65°c FAN ON,  ≤55°c FAN OFF, 80°c output shutdown (12 ~ 15V)   
RTH3 ≥70°c FAN ON,  ≤60°c FAN OFF, 85°c output shutdown (24 ~ 48V)   
EnvironmentWorking Temperature-10 ~ +50°c (Refer to output load derating curve)
Working Humidity20~90% RH  Non-condensing
Storage temp.& humidity-20~+85°C, 10~95%RH
Temp. coefficient±0.03%/°C (0~50°C)
Vibration10 ~ 500Hz, 2G 10min./1 cycle,60min.each along X,Y,Z axes

Safety &

Withstand VoltageI/P-O/P:1.5KVAC     I/P-FG:1.5KVAC     O/P-FG:0.5KVAC
Isolation ResistanceI/P-O/P, I/P-FG, O/P-FG:100M Ohms/500VDC
OthersMTBF234.3K hrs min.      MIL-HDBK-217F ( 25°c )
Dimension215*115*50mm (L*W*H)
Packing0.95Kg; 20pcs/13.5Kg/0.92CUFT

1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25°c of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
3. Tolerance : includes set up tolerance, line regulation and load regulation.

 Product Applications                                                                                                               

• Power tools series: Electric Saw, Drilling Machine, Ginder, Sand blast Machine, Puching Machine,Weeding Machine,Air Compressor etc. 

• Office series: Computer,Printer,LCD Monitor,Scanning Machine etc.

• Household Appliance series: Dust Collector,Fan Lamp or LED ,Sewing Machine etc.

• Kitchen Appliance series: Microwave Oven, Fridge, Freezr, Coffemarker etc.

• Industrial Equipemnt series: shipping,vehicle,metalhalide lamp,solar system,wind power generation ect.

• Electrical filed series: TV,VCRS,Radio ect.


Packaging & Shipping

we use 4 trips to reinforce our carton,the international standards package methods guaranteed our goods safety during transportation

Company Information

 we are a professional manufacturer of power supplies ,all of our products have approved CE

Promise & More items

Our Promise:

Customers satisfaction, provide good quality and reasonable price be to engaged in 100% of us

The above sample photos are coming from main production.

Thanks and the first cooperation to be expected.

How to pay?

1.T/T 30% in advance, T/T 70% before delivery.

2.Others: Paypal, Western union, Money gram, L/C

Production cycle:

1. About big order: Our producing capacity is 50,000-80,000pcs each month, your order will according to real producing    planning, finished in 2-4 weeks.

2. About sample: if sample do not have stock or it is customize type, we will need 7-21days to ready, include purchaing material, producing time and delivery time.

About certificates:

If you need UL, TUV, GS, CB, or others certificate in your market, pls tell us, we willing to invest in certificates, and we are able to do, but according to your quantity.

What is your MOQ?

According to G.W. we will have different MOQ in each models, total G.W. should heavier than 21KGS, because we'll have big discount in delivery freight if G.W. ≥21KGS.

How to contact us?


 Telephone: 86-577-62713666




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China (Mainland) | Manufacturer, Trading Company
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