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Quick Details

  • Place of Origin: Zhejiang, China (Mainland)
  • Brand Name: Steady
  • Model Number: S-350-12
  • Output Power: 301 - 400W
  • Output Type: Single
  • Input Voltage: 110/220VAC selected by switch
  • Output Voltage: 5V,12V,15V,24V,27V48V
  • Output Frequency: 47-63Hz
  • Output Current: 50A,29A,23.2A,14.6A,13A,8.3A
  • Efficiency: 74%
  • Certification: CE
  • Guarantee: 2 year
  • Case material: Aluminium
  • Dimension: 215*115*50
  • G.W: 1.07kg

Packaging & Delivery

Packaging Details: it is packed by vacuum plastic bag to provent moisture and then put into the inner box,

Welcome,my friend! Glad to introduce   350W CE Approved 12V 30A DC  industrial switching power supply 12 volt 29a switching adapter S-350-12  . 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
• 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-350-5S-350-7.5S-350-12S-350-13.5S-350-15S-350-24S-350-27S-350-48
OutputDC Voltage5V7.5V12V13.5V15V24V27V48V
Rated Current50A40A29A25.8A23.2A14.6A13A7.3A
Current Range0 ~ 50A0 ~ 40A0 ~ 12A0 ~ 13.5A0 ~ 23.2A0 ~ 14.6A0 ~ 13A0 ~ 7.3A
Rated Power250W300W348W348.3W348W350.4W351W350.4W
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)
Packing1.07Kg; 12pcs/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 Description
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

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.

More items you may interested, kindly click links:


                   S-350-12( 350W 12V)  single output                                          SFS-100-24 (100W 24V) with Waterproof



   MDR-100-24 DIN rail type              Adapter (24W 12V)               Power Supply 120w12v           NES-350-24 (350W 24V)




350W CE Approved 12V 30A DC  industrial switching power supply 12 volt 29a switching adapter S-350-12

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China (Mainland) | Manufacturer, Trading Company
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The supplier’s transactions conduted via Alibaba.com in the past 6 months.
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Supplier's Trade Assurance Limit: US $97,000
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