A.To increase the reliability of the SMPS, we suggest users choose a unit that has a rating of 30% more power than actual need.
For example, if the system needs a 100W source, we suggest that users choose a S.P.S. with 130W of output power or more. By doing this, you can effectively boost the reliability of the S.P.S. in your system
B. Choosing functions based on your application:
1. Protection function: Over Voltage Protection (OVP), Over Temperature Protection (OVP), Over Load Protection (OLP), and etc.
2. Application function: Signaling Function (Power Good, Power Fail), Remote Control, Remote Sensing, and etc.
3. Special function: Power Factor Correction (PFC), Uninterruptible Power Supply (UPS) function.
C. Make sure that the model qualifies for the safety standards and EMC regulations you need.
1.Apparent Power=Input Voltage x Input Current (VA)
2.Real Power= Input Voltage x Input Current x Power Factor (W)
In MEAN WELL's catalog, we see AC and DC at input, what is it all about?
Due to different circuit designs, MEAN WELL power supply's input consists of three types as below:(√2VAC≒VDC)
a. 85~264VAC;120~370VDC
b. 176~264VAC;250~370VDC
c. 85~132VAC/176~264VAC by Switch; 250~370VDC
In a and b inputs models, power supply can work properly no matter under AC or DC input. Some models need correct connection of input poles, positive pole connects to AC/L; negative pole connects to AC/N. Others may require opposite connection, positive pole to AC/N; negative pole to AC/L. If customers make a wrong connection, the power supply will not be broken. You can just reverse the input poles and power supply will still work.
In c input models, please make sure that you switch the 115/230V input correctly. If the switch is on the 115V side and the real input is 230V, the power supply will be damaged.

Targeting the niche market of "more variety at less volume" for industrial standard power supply and focusing customers of small or medium volume, MEAN WELL is required to meet different power supply requirements of scores of industries with comprehensive product lines, production flexibility, planned stock, and global channel. Amid 9,500 strong standard models launched as of 2017, MEAN WELL possesses a wide range of product application experience in industries, including LED signage/lighting, industry automation/control, information/telecom/commercial, medical, transport, and green energy. With international safety regulation compliance and full-spectrum one-stop-shopping power supply solutions, MEAN WELL is helping customers cut new product development verification time and costs by early entering target markets.

1. What we sell is 100% Genuine Mean Well Power Supply;
2. Small quantity orders acceptable;
3. We will choose the most suitable shipping way for you and inform you the cost advance, decision will be made by you;
4. We have larger stocks and this support us can make a very prompt shipping;
5. To assure you the maximum comfort and satisfaction, we accept pay via T/T, Paypal, Western Union;
6. Price could be negotiated for more and large quantity;
7. Your enquiry will be quickly responded, we will choose the most suitable products and quote the most competitive price for you.