WTB or Swap For - USA - I need some 2N5457 JFETs - Page 1
Forum section: electronics / general

author: t1d
author_rank: Super Contributor
timestamp: May 28, 2022, 07:46:22 am
content: I need some 2N5457 JFETs to play with. The quantity depends on what you are willing to part with. Any footprint TH/SMD will do.Must be genuine OEM components sourced from known component supplier = Mouser/Digikey/Element14/Etc, not from Ebay/Amazon/AliExpress/Etc.I like the idea of our community supporting each other, so I have lots of components to swap. Or, I can pay you something, through Pay Pal.What might you have and what might you need. Please send me a private message. Thanks!

author: IconicPCB
author_rank: Super Contributor
timestamp: May 29, 2022, 05:49:59 am
content: https://www.rockby.com.au/semidiscretesearch.cfm?select=23&subcode=466Take your pick.I am surprised You cant find anything locally in the states.

author: Kleinstein
author_rank: Super Contributor
timestamp: May 29, 2022, 06:28:03 am
content: There are way more different part numbers than different JFET types. In addition the JFETs usually show a large spread and most circuit much thus tolerate quite some variations. So chances are good that one can use a different type of JFET. Fairchild AN6609 is a nice resource listing similar FETs using the same geometry.A SK208 is somewhat similar. Depending on the actual use other types may be a better choice: e.g. SK3557 for audio, 2N4416 / J310 for more higher frequency use.

author: t1d
author_rank: Super Contributor
timestamp: May 29, 2022, 01:15:09 pm
content: Quote from: IconicPCB on May 29, 2022, 05:49:59 amThanks for your reply. My regular supplier is Mouser and they are out of this one model of jfet. I am just trying to avoid the shipping cost on a few $0.30USD parts that I don't absolutely have to have right this minute. Meaning, it is better to make a larger combined order from Mouser, than a separate order from another supplier. However, reputable US suppliers are definitely heavily depleted of components, presently. So, it is more fun to reach out to the EE community in the spirit of comradery.

author: t1d
author_rank: Super Contributor
timestamp: May 29, 2022, 01:27:01 pm
content: Quote from: Kleinstein on May 29, 2022, 06:28:03 amGreat to hear from you, Kleinstein!!! Good information, as always, too. I will check the availability of these other models. IIRC, J310 is also out, at Mouser. But, it is better to combine several components into a bigger order, to justify the shipping cost. Mouser is mostly out of the other things that I might order, presently, so I can't even make a combined order, even if I find a substitute jfet. Cheers.

author: edavid
author_rank: Super Contributor
timestamp: May 29, 2022, 04:52:32 pm
content: Quote from: t1d on May 29, 2022, 01:15:09 pmIs their website inventory wrong?https://www.mouser.com/ProductDetail/Central-Semiconductor/2N5457-BK-PBFREEOr how about the J113 for a cheaper alternative?https://www.mouser.com/ProductDetail/onsemi-Fairchild/J113

author: t1d
author_rank: Super Contributor
timestamp: May 29, 2022, 08:39:51 pm
content: Hi, edavid. Thank you for your help.Quote from: edavid on May 29, 2022, 04:52:32 pmYes, I saw those, but they are $1.60 each for a $0.30 part.Quote from: edavid on May 29, 2022, 04:52:32 pmI did not know about this alternative. I will check it out. Cheers!

author: Kleinstein
author_rank: Super Contributor
timestamp: May 29, 2022, 09:25:19 pm
content: The J113 is a bit larger (more capacitance and higher Gm), but just as a cheap part for general experiments it is OK. Very similar ones are PN4393 / mmbf4393 ond BSR58.

author: guenthert
author_rank: Frequent Contributor
timestamp: May 30, 2022, 04:17:02 pm
content: For older parts I'd go to Jameco:https://www.jameco.com/z/2N5457-New-Jersey-Semiconductor-Transistor-2N5457-TO-92-JFET-N-Channel-25-Volt_253948.html

author: edavid
author_rank: Super Contributor
timestamp: May 30, 2022, 04:50:00 pm
content: Quote from: guenthert on May 30, 2022, 04:17:02 pmOP already said the current production parts from Mouser were too expensive, so why would he pay even more for surplus parts from Jameco

author: bd139
author_rank: Super Contributor
timestamp: May 30, 2022, 07:19:56 pm
content: MMBF5485/86 are same series and should be cheaper.Old JFETs are expensive. Get used to it.

author: edavid
author_rank: Super Contributor
timestamp: May 30, 2022, 08:06:36 pm
content: Quote from: bd139 on May 30, 2022, 07:19:56 pm2N5484/MMBF5484 etc. are out of production and much harder to find than 2N5457

author: bd139
author_rank: Super Contributor
timestamp: May 30, 2022, 09:34:24 pm
content: FGS the damn things are dropping like flies.It's probably the same die as a mmbf4416. I seem to remember reading they are same process, just different binning.The ubiquitous MPF102, the world's crappest FET, is the same just not even binned. The bad man in me considered relabelling a bunch of far superior FETs to sell to hams as MPF102's

author: edavid
author_rank: Super Contributor
timestamp: June 01, 2022, 07:16:01 pm
content: Quote from: bd139 on May 30, 2022, 09:34:24 pmGood point, MMBF4416A is available from Mouser and would be a decent choice for OP.