Siglent Technologies SPD3303X-E Triple Output Power Supply

There are some good reviews of the features and performance of this supply, so I will just mention that Siglent appears to now be shipping a new version of hardware (and firmware) with the SPD3303X-E. Presumably this corrects the issues reported in some recent reviews with DOA or short-lived units that reboot continuously. I just received a new unit and the calibration date is Dec. 2023. The unit shows it has V6.2 hardware and a firmware release that is not even available for download yet on Siglent's website (as of March 2024). So I am going to ASSUME based on this that the issues reported with the older versions has been fixed. So far the unit has operated flawlessly, and the two main (32V) outputs are accurate to better than the stated resolution. The third output is very limited and I don't really see myself using it, but if you need a logic source it should work for that. The UI is perhaps a little unusual but in my opinion, it's very simple to learn and operate. I've used the series-output function to power 48V devices and it works well for that (note that it is limited to 60V in series, not the 64V that you might expect). I have not had a use for the parallel (higher current) function yet. I appreciate the variable-speed fan. With the outputs off and the unit powered on, the fan does not operate. It starts to spool up at around 30-40W of output, but it's not until you get above 50% of rated power that the fan noise becomes what I would describe as noticeable. This is replacing an older single-output linear supply that had very noticeable fan noise even at idle output, so I can live with the fan on this one. I haven't done anything fancy with it yet like control it remotely or save/recall setups, and not sure I'll need to as I'm not an engineer, I'm a telecom technician. It's pretty heavy, but all good linear supplies are. The leads, while decent and tight-fitting in the sockets, are only 1M in length so you'll need to be closer to the supply to use them, or you can do what I did and buy some 5- or 6-foot test leads on Amazon (they're out there). So far I'm pleased with this unit.

Product: Siglent SPD3303X-E Programmable DC Power Supply Use: for work lab setup at my house (work from home) Purchased: July 2022 (2-3 months of usage at the time of this review) Background/Usage: I am an engineer with 30+ years of post graduate experience with a focus of 25+ years in the design and development of medical imaging equipment. This is the 3rd piece of Siglent equipment I own, along with the Siglent SDG6022X Arbitrary Waveform Generator and the Siglent SDS2204X Plus Digital Storage Oscilloscope (many additional options purchased). My overall impression is that I like this power supply. I have been exposed to and used many other manufacture equipment from many of the top brands. Since I purchased this using my "dime", I tend to balance form, function, quality, price and several other factors. Value: I could have spent a lot less and gotten a lot less features and quality. For me, quality was a heavier factor that you just are not going to get with those sub $100 supplies. Quality: The build quality is very good. A bit noisier than what I personally like, however, not as noisy as some very expensive and most cheap counter parts. With this being in a lab bench setup with several other pieces of equipment, noise is noise. Screen display is sufficient for what is needed, showing what one needs to see. Buttons and knobs are more than sufficient, decent quality. My one "ding" (CON) is the banana plugs feel a bit cheaper than everything else on this piece of equipment and are non-standard size for a BNC dual banana plug adapter. This is a big oversight on Siglent's part and a common point of complaint. I overlook this and can easily work around it. Features: For the value, this is feature rich. I know the specs say this is 3 output, and technically it is... however, only 2 are IMHO independently controlled, those being the 32 volt @ 3.2 amp outputs. The 3rd one is a selectable 2.5/3.3/5.0 volts @ 3.2 amp output. So yes, technically 3. I do like and use the 3.3 volt or 5.0 volt output for small prototype boards. Adding a 12.0 volt selection would have been a win IMHO... but so be it. The 2 independent programmable outputs can be put into series for up to a 60 volt @ 6.4 amp max output. Something I won't need but nice. I utilize the minimum resolution of 1 mV and 1 mA setting ability. Although many may not need this fine resolution, it is very necessary in my line of work dealing with very small signals. I am happy with this supply and would recommend it.

Really nice power supply, I got one in undergrad and me and my professors liked it enough we replaced the ones in the school lab with these. Great for most projects, one issue I experienced is that the reverse current protection is less then one would hope, if you connect a power source the wrong way you can easily fry it, would add an ideal diode if planning to work with batteries. Otherwise very stable supply for motor controllers, and accuracy well beyond what anyone needs. Dials are all really smooth and feels very professional.

After watching many reviews on this power supply, I decided to buy it. It was a good choice for the price range. Its performance is spot on, although on some voltage ranges, you MIGHT notice a .01 volts difference on the screen from what you choose and what the output actually is. It's not a big deal and since there are only 2 digits past the decimal point, that .01 may actually be something like .006. If that's a big deal, then dial in the voltage you want, minis -.01. So for 12.00 volts, choose 11.99 volts. But that is so not a problem. As expected, it's a bit heavy, but that's due to the transformer inside, which are always heavy. I actually like the heaviness and it gives it a feel of good quality, which it is. LOVE IT! UPDATE: OCT 2019 STILL LOVE IT! Use it daily. :) UPDATE: JUN 2020 YUP! STILL LOVE IT. Still used daily. ;)

Les photos parlent d'elles même. La seule remarque que je peux faire, c'est que le canal 2 est plus près de la tension voulue.

Buscaba una fuente de poder para mis proyectos de electrónica (no soy profesional) y cumplió su objetivo. Ya venía con el firmware mas reciente y el selector de voltaje/fusible configurados para mi país. Me gusta que tiene un puerto ethernet y se puede controlar remotamente. Así pude generar gráficas en la computadora.

Alimentatore molto buono, per quello che devo fare direi oltre aspettative

Gutes Netzteil, das sich mit einem Hack leicht auf die größere Auflösung des teureren Modells tunen lässt. Leider keine Stromeinstellung/Überwachung/Messung des 5V-Kanals.