Siglent SPD3303X Binding Post Issue - Page 1
Forum section: electronics / testgear

author: Par3689
author_rank: Contributor
timestamp: June 23, 2019, 06:02:00 pm
content: I am looking for PSU. As per my budget I am looking at Siglent SPD3303X and Rigol DP832I wanted to know if the binding post issue still exists with Siglent PSU. Anyone who bought recently still has problem?

author: BillB
author_rank: Unknown
timestamp: June 23, 2019, 06:43:49 pm
content: The length issue has been fixed. See this thread:https://www.eevblog.com/forum/testgear/single-the-triple-output-power-supply/msg2448480/#msg2448480

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: June 23, 2019, 07:01:51 pm
content: I have a SPD3303x-E that is approximately 6 months old. The binding posts work fine with all of my 4 mm jacks, snug neither too tight or loose. Although my assortment of leads is not exactly exhaustive. The inter post distance is not the standard 19mm, it is more like 23 -24 mm. Not a problem for me but maybe a problem for people who want to use dual leads.

author: DaJMasta
author_rank: Super Contributor
timestamp: June 23, 2019, 07:11:07 pm
content: The issue was short lived, and production units have been fire for years. I've got two with no such issues, both I've had for a couple of years now, this also gets asked pretty regularly, don't think it will do anything for future asks of the same, but the search function (magnifying glass icon, not top right text box) can find one of the several discussions of this over the last few years.

author: Par3689
author_rank: Contributor
timestamp: June 30, 2019, 04:39:03 pm
content: Quote from: chickenHeadKnob on June 23, 2019, 07:01:51 pmThanks for your input. Non standard binding post distance won't be issue for my use case also.I am pretty much leaning towards Siglent PSU...

author: petert
author_rank: Regular Contributor
timestamp: January 19, 2020, 09:48:18 pm
content: Has the the binding post spacing been fixed? I am specially wondering about people having bought the Siglent SPD3303X-E recently.

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2020, 12:11:34 am
content: Quote from: petert on January 19, 2020, 09:48:18 pmI haven't heard that it has been changed and it's still 20mm AFAIK.I can get a new unit out and check if you like.

author: petert
author_rank: Regular Contributor
timestamp: January 20, 2020, 12:35:20 am
content: That would be very kind. I am interested in the distance between the binding posts, mostly because I want to fit banana-to-bnc or similar connectors.If there was no change, are you aware of any new PSUs from Sigilent being planned?

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2020, 12:57:53 am
content: Quote from: petert on January 20, 2020, 12:35:20 amIt's 22mm c-cQuoteNope, nothing in the near future but the single channel SPD1000X PSU's are 19mm binding post c-c spacing.

author: petert
author_rank: Regular Contributor
timestamp: January 20, 2020, 10:09:59 pm
content: Could someone recommend cables that would fit this PSU, especially ones with silicon insulation?I am looking for banana plug to banana plug, banana plug to crocodile clips, banana plug to mini-hooks.Someone suggested Hirschmann cables, but I will have to see what is available in the country I am right now, so knowing the length of the metal part of the plug (for plugs that fit well) would be useful.

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2020, 10:33:14 pm
content: Quote from: petert on January 20, 2020, 10:09:59 pmThey come with 2 pairs of average quality cables, one banana to croc clips and the other spade to croc clips that you can use on the binding posts.Any banana plug ~19mm/3/4" or longer works fine as long as it hasn't got a shoulder that prohibits full insertion.Lantern style plugs work fine and best if you find ones that the lantern swelling is nearer the tip rather than midway along the plug.As these are only a 3A supply cheap silicon leads should be fine unless you need every mV/mA at full output.

author: petert
author_rank: Regular Contributor
timestamp: January 21, 2020, 09:05:58 am
content: Thanks for the detailed reply

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: January 21, 2020, 10:40:28 am
content: Apart from the binding post issue which my SPD3303X still has, be aware that Channel 3 on the Siglent is fixed to one of 3 switch-selectable voltages 2.5/3.3/5.0 and a fixed 3.2A which makes it unusable for my purposes - I can't hook up a prototype 3.3V circuit with a current limit of 3.2A 'protecting' it.The Rigol DP832 (which I also own) is a much better PSU IMHO, Channel 3 is the real deal with the same controls as the other 2 channels plus the DP832 can be upgraded to a DP832A fairly easily without breaking any seals.

author: petert
author_rank: Regular Contributor
timestamp: January 22, 2020, 10:19:15 am
content: I heard it has a pretty noisy fan, though, compared to the Siglent.What about ripple current / general DC current smoothness between the SPD3303X and DP832?

author: tautech
author_rank: Super Contributor
timestamp: January 22, 2020, 10:25:47 am
content: Quote from: petert on January 22, 2020, 10:19:15 amSiglent PSU’s have fully isolated outputs.

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: January 22, 2020, 12:53:48 pm
content: I changed the fan on my DP832'A'Output 3 shares it's ground with Output 2 but I have yet to come across a situation where I couldn't make it meet all my needs. Having a fixed 3.2A current limit on Output 3 on the Siglent is next to useless IMHO.My SPD3303X-E is listed in the FS/W section if anyone wants one.

author: petert
author_rank: Regular Contributor
timestamp: January 22, 2020, 06:31:12 pm
content: Quote from: Gandalf_Sr on January 22, 2020, 12:53:48 pmIt's a limitation which I didn't consider at first, since I was only going to use it to power up readily made boards, as an additional convenience, where overcurrent protection would not really be an issue.Still a pitty that it would limit possible applications.There are always tradeoffs unfortunately.I just wish there were revisions of both these models, that fix the minor issues.

author: tautech
author_rank: Super Contributor
timestamp: January 22, 2020, 06:52:21 pm
content: Quote from: petert on January 22, 2020, 06:31:12 pmThis is a illusion argued on a regular basis, smart users know the limitations of their equipmentandwork with/around them.The 3rd channel current 'limitation'is of little concern if part of any design is proven on one of the current limited channels first then when known not to give issues transferred onto ch3.Yet if your designneeds3 isolated negatives then start looking for another PSU.Both instances demonstrate the designers efforts to market equipment at a low price and while one units shortcomings might be a deal breaker the other may not.Horses for courses.