How to search on digikey for PSU's? - Page 1
Forum section: electronics / beginners

author: Faringdon
author_rank: Super Contributor
timestamp: May 30, 2022, 11:55:46 am
content: Hi,On Digikey, how do you search for [>3900W output] & [single phase input] ?...ie for AC/DC PSU'sThe scroll feature doesnt work when your holding down the control key, and it takes ages to select individually the huge number of single phase options.Ditto the large number of power options.https://www.digikey.co.uk/en/products/filter/ac-dc-converters/133

author: tepalia02
author_rank: Regular Contributor
timestamp: May 30, 2022, 12:20:05 pm
content: Tried '3900W power supply'. Appeared nothing.

author: Ian.M
author_rank: Super Contributor
timestamp: May 30, 2022, 01:46:59 pm
content: I'm not surprised.In Europe, the common single phase power sockets are rated 230V, max. 16A, so the upper limit for a single phase input PSU is going to be about 3500 watts if the PSU has better than 95% efficiency. In the UK the limit's even lower, 240V 13A, so you wont find anything over 3000W.*ANY* PSU that draws more than 13A (UK) or 16A (EU) from a single phase supply will be special purpose so won't be likely to be found in general distributor catalogs.

author: Faringdon
author_rank: Super Contributor
timestamp: May 30, 2022, 04:17:54 pm
content: Thanks, i admit its special, and of course, AYK, it has to be specially wired up...eg , electric showers are about 10kW, and EV chargers are 32A now.

author: wizard69
author_rank: Super Contributor
timestamp: May 30, 2022, 05:06:52 pm
content: Quote from: Faringdon on May 30, 2022, 04:17:54 pmI'm not sure what your problem was in the UK but the American site turned up 103 power supplies when I selected 3884 watts and higher but below 10,000 watts. That narrows things down to a very searchable list manually. I did not try adding to the search terms the various voltages possible, which would narrow the list even more.

author: Faringdon
author_rank: Super Contributor
timestamp: May 30, 2022, 05:46:16 pm
content: Thanks, i think they would be three phase input though.This is abaout 4kW+, single phase, down to 100VAC.(Also PFC'd and isolated and output regulated)

author: Gyro
author_rank: Super Contributor
timestamp: May 30, 2022, 06:07:06 pm
content: Quote from: Faringdon on May 30, 2022, 04:17:54 pmThose are permanently installations, on dedicated circuits and seperate breakers in the consumer unit. You need an electrician to install them. You're not just going to be able to just plug a 4kW PSU in.

author: Faringdon
author_rank: Super Contributor
timestamp: May 30, 2022, 07:42:11 pm
content: Thanks.....supposing a sparky set up one of those installations with a plug ...so you could plug into it, with the 4kW SMPS....could that not happen?Otherwise i cant see how people use 4kW SMPS's...and offtheshelf 4kW, 100VAC, single phase SMPS's would be a non-existent thing?

author: tggzzz
author_rank: Super Contributor
timestamp: May 30, 2022, 08:01:24 pm
content: Quote from: Faringdon on May 30, 2022, 07:42:11 pmOf course they could add a plug. They could also run into a busy road without looking, or go swimming in a strong riptide, or drive at 120mph on the road, or supply Class A narcotics.In other words, the question you posed looks like nothing more than wishful thinking hoping to be able to avoid safety and reliability constraints.

author: Gyro
author_rank: Super Contributor
timestamp: May 30, 2022, 08:04:57 pm
content: Quote from: Faringdon on May 30, 2022, 07:42:11 pmFor single phase, the only higher option is a 16A industrial one (the Blue one) [EDIT: which doesn't work for your 4kW load]. Beyond that, it's 400V three phase (Red).No, It isn't at all normal to have a 4kW SMPS (or any other >3kW) plugged load in a UK single phase, non-industrial, environment. As I previously indicated, showers, EV charging points (and cookers) are deliberately hard-wired by an electrician.P.S. I don't know where your "100V" is coming from. I thought you were talking UK/EU mains. At 100V input, it ismuchless feasible.

author: Gyro
author_rank: Super Contributor
timestamp: May 30, 2022, 08:35:54 pm
content: Why are you double posting this stuff?https://www.eevblog.com/forum/renewable-energy/4kw-psu-in-20cm-by-20cm-by-8cm/Is this one the 'treez (and his mates?) doing a hobby project' and the other one the 'treez and his mates' prototyping a product (having failed to design one themselves)?

author: dmills
author_rank: Super Contributor
timestamp: May 31, 2022, 03:32:48 pm
content: Quote from: Gyro on May 30, 2022, 08:04:57 pmBlue CEE form connectors are available in WAY bigger then 16A, I have a 32A single phase in a couple of places in my garage, and use 63A single phase examples somewhat routinely, and 125A ones rarely.However above 16A or so, three phase is the way to play most of the time.

author: SmallCog
author_rank: Frequent Contributor
timestamp: June 01, 2022, 03:04:44 am
content: Quote from: dmills on May 31, 2022, 03:32:48 pmWhat he saidIn Australia the standard power socket/outlet is rated at 10A, and you'll occasionally come across 15A sockets for plugging in larger items such as welders, air conditioners etc. These are backwards compatible with the standard 10A plug so a 10A plugged device can be used on a 15A socket but not the other way around.Up to 32A you'd typically see a Clipsal 56 Series socket for large single phase items, with the 56 Series being the most common way to connect 3Phase devices in Australia.I've seen and used CEE Forms, mostly for plug and socket equipment bigger than 32A.Mostly see it on non-fixed stuff, big loads on big generators.