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Which electronic load is more useful to you...and why?

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HooRide:
I'm torn between which model e-load to get for my bench, I've never done any DC work above 90V so 120V seems fine and I've built a few power supplies in the 25A 13.8V range so I'm leaning towards the 120VDC 30A max model but if I ever did need to do something with a higher voltage...I might have buyer's remorse. Also, the BK Precision 8500 is easier to find and a few $$$ less expensive than the 8502.

Thoughts?

hlavac:
Well I would consider including local power grid voltage rectified ( times square root of 2) in the voltage range in case you need to test a PFC preregulator / soft start circuit in a power supply or something... I would personally go for the 500V one :)


robrenz:
Have you read this whole thread?
https://www.eevblog.com/forum/product-reviews-photos-and-discussion/why-is-bk-precision-still-in-business-bk8500-programmable-load-oem-found/msg137734/#msg137734
If not, it is a  must read. I learned a whole lot about Eloads and which one I would buy and ways to use it I never thought about, most excellent thread.

saturation:
>100VDC is far less common in electronics than electrical and industrial applications, and mostly not for control electronics but to power motors, displays, lasers, etc.,.  However, the lowly Array 3710a is rated to 360V, 30A, 150W, and cost far less than the BK.  But look into the Maynuo and Itech variations too.  Robrenz has great links for more info.

> 100V designs run into problems with dielectric breakdown, arc over, and other nasties when added to high current, high injury and explosive potential [ e.g. plasma].  So whenever possible keep working voltage under 35V, with less worries for current.  You can see this philosophy in PC power supplies.  If you persue PSU options among big manufacturers like Agilent, there are far more offerings below 100V than above it.

nctnico:
500V is much and 15A is a lot too. So I voted for 500V / 15A. Some of my recent designs have voltages up to 300V which is why I bought the Array 3710.

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