Electronics > Projects, Designs, and Technical Stuff

transformer sourcing

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RUWO1:
Hi,

I was wondering where you all source your transformers for power supplies. I haven't had any luck with the usual suspects like mouser, digikey, etc nor with local electronics shops. EE's have told me to go try making my own but i need about a dozen 240v(mains) to 12V transformers which I would have thought to be fairly common. Where do you buy your transformers?

thanks

janoc:
E.g. Mouser?

https://www.mouser.fr/Power/Transformers/Power-Transformers/_/N-8u9n5?P=1y8s5syZ1y8s5srZ1yzuxsfZ1ydkztuZ1z0wcy4

Or Digikey?
https://www.digikey.com/products/en/transformers/power-transformers/164?k=transformer&k=&pkeyword=transformer&sv=0&pv1393=147953&pv1393=147961&pv1393=150722&pv1393=153583&pv1617=87718&sf=0&FV=-8%7C164&quantity=&ColumnSort=0&page=1&stock=1&nstock=1&pageSize=25

All "the usual suspects" stock these things.

Of course, you didn't say any other specs, so these may or may not be suitable (power rating, construction, etc.)

Maybe you have been searching for the wrong terms?

RUWO1:
your digikey link has 4 search results and none of them are really suitable for power supply applications(the output current is in the milliamps range). Mouser has only 2 and i'd like to have just a little more options. I had found these but their stock seems more focussed on other uses, not really power transformers. output current in the 4-6 amp range would be nice.

2N3055:
Look at the TME...

janoc:

--- Quote from: RUWO1 on August 10, 2020, 10:36:48 am ---your digikey link has 4 search results and none of them are really suitable for power supply applications(the output current is in the milliamps range). Mouser has only 2 and i'd like to have just a little more options. I had found these but their stock seems more focussed on other uses, not really power transformers. output current in the 4-6 amp range would be nice.

--- End quote ---


You didn't say any of that in your original post, only that you can't find any - which is obviously not the case. Those are all power supply trafos but obviously some are for low power applications. Also, a 6A transformer/linear supply is going to be large, expensive and heavy. Unless you have specific reasons for such supply, a switching supply is likely to be a better solution.

TME mentioned by 2N3055 has quite a choice (sorry for the horrendous URL - they encode the filters in the URL):

https://www.tme.eu/fr/katalog/transformateurs-toroidaux_100028/?s_field=1000011&s_order=desc&search=transformateur&visible_params=2%2C444%2C101%2C445%2C449%2C74%2C117%2C142%2C328%2C456%2C82%2C178%2C436%2C457%2C351%2C450%2C482%2C536%2C317%2C511%2C632%2C1776%2C21%2C397%2C424%2C522%2C2846%2C1467%2C160%2C236%2C1729%2C1605%2C483%2C484%2C487%2C486&mapped_params=445%3A1445082%3B449%3A1445107%2C1811325%2C1445107%3B456%3A1445424%2C1445424%2C1594406%2C1445438%2C1445396%2C1489573%2C1489573%2C1594711%2C1445567%2C1513151%2C1446079%2C1445478%2C1489570%2C1594864%2C1489570%2C1445420%2C1445420%2C1594435%2C1489602%2C1594744%2C1489602%2C1445823%2C1445433%2C1445395%2C1489580%2C1594416%2C1489580%2C1446085%2C1445490%2C1489662%2C1489662%2C1594861%2C1445419%2C1445419%2C1697449%2C1446083%2C1445976%2C1489594%2C1445488%2C1489620%2C1489607%2C1445987%2C1445529%2C1489672%2C1446011%2C1445621%2C1489676%2C1445628%2C1489680%2C1445998%2C1446181%2C1446021%2C1489682%2C1446033%2C1489688%2C1446185%2C1489690%2C1446199%2C1489692%3B

If you don't like toroidal:
https://www.tme.eu/fr/katalog/transformateurs-avec-fixation_100531/?s_field=1000011&s_order=desc&search=transformateur&visible_params=2%2C444%2C445%2C101%2C449%2C117%2C10%2C74%2C82%2C436%2C457%2C178%2C456%2C317%2C1729%2C236%2C1362%2C1730%2C450%2C1776%2C482%2C177%2C511%2C453%2C397%2C2356%2C160%2C142%2C484%2C483%2C32%2C1246%2C487%2C486&mapped_params=445%3A1445082%3B449%3A1811325%2C1811325%2C1445107%3B

If you don't like TME, then RS/RadioSpares stocks them too:

https://fr.rs-online.com/web/c/alimentations-et-transformateurs/transformateurs/transformateurs-toriques/
https://fr.rs-online.com/web/c/alimentations-et-transformateurs/transformateurs/transformateurs-a-montage-chassis/

And you can always go directly to the manufacturers and order from them.

There is plenty of choice.

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