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Quick Details

  • Place of Origin: Zhejiang, China (Mainland)
  • Brand Name: Steady
  • Model Number: S-400-24
  • Output Power: 301 - 400W
  • Output Type: Single
  • Input Voltage: 110/220VAC selected by switch
  • Output Voltage: 24V
  • Output Frequency: 47-63HZ
  • Output Current: 17A
  • certification: CE
  • Enclosure Material: Aluminium
  • Warranty: 2 Years
  • Dimensio: 215*115*50mm (L*W*H)
  • G.W: 0.95Kg
  • Efficiency: 87%
  • Product Name: 400W single output swithing power supply
  • Protections: Short circuit/Over load/Over voltage/Over temp

Packaging & Delivery

Packaging Details it is packed by vacuum plastic bag to provent moisture and then put into the inner box,20pcs to a neutral carton.
Delivery Time Shipped in 14 days after payment

Welcome,my friend! Glad to introduce  S-400 switching power supply. If you have any questions, please don't hesitate to ask me.


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Product Description


• Universal AC input / Full range

• Protections:Short circuit/Over load/Over voltage/Over temp
• 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
• Low cost


Model S-400-5S-400-12S-400-15S-400-24S-400-27S-400-48
OutputDC Voltage5V12V15V24V27V48V
Rated Current60A33A26.6A16.6A14A8.3A
Current Range0 ~ 60A0 ~ 33A0 ~ 26.6A0 ~ 16.6A0 ~ 14A0 ~ 8.3A
Rated Power300W396W399W398.4W378W398.4W
Ripple & Noise (max.) 150mVp-p150mVp-p150mVp-p150mVp-p200mVp-p240mVp-p
Voltage Adj. Range4.5 ~ 5.6V10~13.2V13.5~18V20~26.4V26 ~ 32V41 ~ 56V
Voltage Tolerance ±2.0%±1.0%±1.0%±1.0%±1.0%±1.0%
Line Regulation±0.5%±0.5%±0.5%±0.5%±0.5%±0.5%
Load Regulation±1.0%±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
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 ~ 6.75V13.8V~16.2V18V~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/19Kg/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.


Important Notice

* These products are Constant Voltage LED Drivers. For dimming purpose, please equip with compatible low voltage dimmer switches and arrange your circuit in the following sequence:

Mains – LED Driver – Low Voltage Dimmer – Low Voltage LEDs

• 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.


Company Information


1. Zhejiang Steady Electronic Technology Co.,Ltd was established in 2005 , 12 years to focus on research and development of the switch power .

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

3. We have no Min Order Quantity, We accept OEM. 

Packing & Shipping


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.




   High quality china dc

220v 110v ac to dc 400w 12v power supply 12v 30a transformer

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