Where do all of you go for buying your PSUs? I am looking for a Meanwell RSP 500-12, and probably an RSP 200-24 as well. 3d Printing Canada does not have either, and while I can find multiple sites that are based in Canada or will ship here reasonably, I figured it would be a good idea to ask what others would recommend. I have bought from Amazon in the past, but would rather give a different company the business in the future if possible. Thanks!
I recommend Digi-Key.
They provide next day delivery (for orders placed before 8:00PM Eastern time the day before) free for orders of $200 CAD or more and $8 less. When I look at their pricing compared to Amazon.ca they’re basically the same and maybe a bit cheaper.
Why are you looking at the RSP series and not the LSR? An Meanwell LSR supply is literally half the cost of the RSP and the only real reason to go with the RSP series is that they have active power correction which is important if you have marginal AC sine wave power coming into your home. If you look at the specs, you’ll see the efficiency of an LSR unit is at least as good as the comparable RSP.
Thanks. I will give them go then.
The reason for my choice of the RSP series for the 200 watt supply, is that my prior research told me supplies with active power fluctuation compensation were quite a bit more efficient. However, you are right that according to meanwell, the efficiency between the two lines is practically identical. I’m not sure why I didn’t think to compare the two lines’ official specs.
Active power fluctuation compensation is only useful in something like in a factory where there are large changing inductive loads (ie motors that turn on and off or change load levels) on the same circuit as the power supplies.
I’m not sure why online references say they are a lot more efficient than uncompensated power supplies without qualification. The assertion is only true in circumstances like the factory example above where the power sine wave is distorted by dynamic inductive parallel loads on the same circuit.
Thanks for that explanation. That helps a layman like me understand that a bit better.