Q-120D 120W 12V 2A designer Best-Selling 12v 40a switching power supply 500w s 500 12

Where is our power supply use?                                                                              

Features of 12v 40a switching power supply 500w s 500 12

AC input range selectable by switch 

Protections: Short circuit / Overload / Over voltage  

Cooling by free air convection  

LED indicator for power on  

100% full load burn-in test 

High efficiency, long life and high reliability 

2 years warranty

Specifications of 12v 40a switching power supply 500w s 500 12

Product picture                                                                                                                             

 What is the Overall dimension of our power supply?                                                                       

 What is the packing for our product?                                                                                                         

What is the delivery way?                                                                                                                                    

(1)If ship by sea and Air,you can get Bill of Loading,CO,Commerical invoice,Packing list from us after ship.

(2)If ship by express company,you will get a Tracking No. from us after ship.

 What the Certifications do we have obtained?                                                                                       

What is the payment?                                                                                                                                           

What's the Refund & Replacement?                                                                                                             

1. 90-day-warranty.

If there is any quality problem (defective / don't work) of the goods, it could be returned within the warranty days. (Please notify us as soon as possible)

2. Any items must be returned in their original condition to qualify for a refund or replacement. (Any used items cannot be refunded or replaced).

Company view                                                                                                                                                       

Our team                                                                                                                                     

How to choose our power supply?                                                                                                       

1. Single output

To determine the power after the output voltage is decided. The power range of our switching power supply is 10W to 1500W, output voltage from 3V to 220V DC. If the requirement is 24V, 1A, we can choose S-25-24, and within cost range, retain 10% -20% of the power allowance.

2. Multi-output

The multi-output power supply has the main and secondary circuit output. The character of main circuit output is better than the secondary.To ensure the load regulation and so on, every circuit has to be with a certain load. If just using the second circuit, the main circuit has to be matched with corresponding dummy load (more than 0.5A or larger)

3. Before placing an order, please kindly confirm us the details below: Input voltage, Output voltage, Output current, Power,waterproof or not, special size or not, and other special requests.

4. When purchasing the power supply, the customer should know the operation environment, for example, temperature, humidity, altitude, etc.

How to use our power supply?                                                                                                                       

1. Before using the power supply, make sure whether the input voltage specification is in accordance with the input voltage nominal value of the power supply to use. Generally, the switches are located at220V, please note that when using.

2. Wiring in strict accordance with the drawings.

3. Please note whether the input line and output could meet the power requirement.

4. Waterproof issue of switching power supply

In general, the base plate switch power supply is not waterproof. If the power supply is installed outdoors, please equip it with waterproof case.

How to installation our power supply?                                                                                                   

Please use the proper screw to fix the power supply in the applicable environment, the screw length should be less than 6mm, cannot reach to the circuit boards, to avoid touching the internal components and conductive dangerous.

There should be ventilation channels or exhaust devices in the power supply working space. In order to ensure the use security and avoid reduce the interference; please make sure that earth the ground wire well. The ground wire is large than AWG#.

After installation, please measure the insulation resistance of shell between input and output, to avoid electric shock.

Questions for our power supply?                                                                                                                

1. When using your power supply, find the shell with voltage, is that normal?

Answer: That is normal. According to the EMI request, the input port and the shell are connected by a capacitor, which causes the voltage on the shell. It’s specified in the IEC standard that the leakage current is less than 3.5mA. It’s safe and won't cause any damage to people.

2. When needing 24V voltage, but only 12V power supply at hand, can this work to connect 2 pieces 12W power supply in series?

Answer: It’s workable. We can cut down the cost through that way sometimes.

3. Can use S-50W power supply as the charging power supply?

 Answer: Yes. But in order to avoid battery feedback, please be advised use a series diode on the output, and pay attention to the diode heat dissipation.

4. Why the power supply fails to boot correctly?

 Answer: When the load is electric, light bulbs or capacitive load, the instantaneous electric current is excessive when booting, it can cause overload protection. In this case, please choose the appropriate power or contact the manufacture factory.

Process of production                                                                                                               

What is the MOQ of our power supply?                                                                                                 

MOQ: We support sample order.(1~5PCS)

More than 500PCS,can pring Logo on the products.