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Siglent SPD3303C Series Programmable DC Power Supply, Siglent fails to respond
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7thSenpai:

--- Quote from: slugrustle on January 21, 2024, 06:35:00 pm ---Regulatory compliance is the likely reason for this update.  60VDC is cited as the touch safe DC voltage limit in a dry environment in some regulatory standards (UL, IEC, etc.).  I don't have access to these documents outside of work, but if memory serves, at least some of them have that limit.  I don't see a regulatory standard listed in any of the documentation for the SPD3303C, but going on a manual for another power supply and the presence of a CE mark on the SPD3303C, my best guess is they constructed it to IEC 61010-1.

--- End quote ---

Got ya.  :-+ I suppose manually wire them in series to get 64V is in regulation.. whatever keeps regulation happy.


--- Quote from: slugrustle on January 21, 2024, 06:52:30 pm ---While I really like the SPD3303C, and the value for money is very hard to beat, one thing bothers me the most about it:  On a couple of occasions, I have had the supply switch to random settings after accidentally shocking it with ESD while plugging something in or pressing a button.  I now am careful to always wear an ESD strap when operating the SPD3303C, even I'm only touching the supply itself and not the circuits that I'm testing.

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Been covered here I had same issues, its a known issue https://www.youtube.com/watch?v=KkbVq94F688. I would have imagined with ESD the output caps would absorb it (220uF 50V caps on the output) so I feel like something else is going on. I have voided my warranty and found that the 3.3V / 5V regulators run quite hot enough to leave brown discolorations underneath the chassis. Not so impressed seeing them regulators without heatsinks.
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