Is there an online service for looking up/cross referencing components - Page 1
Forum section: electronics / beginners

author: tomoram
author_rank: Contributor
timestamp: December 21, 2020, 10:05:50 pm
content: I'm still fairly new to the world of electronics. While I'm getting better at the understanding and designing, I'm finding the locating and sourcing of parts a complete nightmare.Current example: I'm following a design which requires a 1N1418 diode. This diode doesn't seem to exist in my usual online stores (in the UK). When I Google it I get a few datasheets but Google has mostly decided to replace the search with 1N4148.My question: am I doing this the way everyone else does (i.e. searching Farnell, RS, Rapid, Mouser, etc + Google)? Or, is there some (not so) secret online cross-referencing database you all are using? I'd love to type in "1N1814" and get a list of typical uses, alternatives, etc. Also, being able to search something like TL074 and getting a summary of the differences between the variations (i.e. TL074ACN vs TL074CD vs TL074ID).

author: bob91343
author_rank: Super Contributor
timestamp: December 21, 2020, 10:41:14 pm
content: What I do is download a data sheet. I have a lot of experience (some day so will you) and have a pretty good idea what might work. If I am stumped I will post a question online and usually get a useful answer.Back in the day there were substitution guides published but they no longer exist.The 1N1418 appears to be a 10W 15V zener diode. Those are readily available with other designations. Try NTE5191A.I also have some older publications that gives specs for thousands of old part numbers and I treasure those books. So if you need info on some specific part, ask.

author: wraper
author_rank: Unknown
timestamp: December 21, 2020, 10:43:54 pm
content: Quote from: tomoram on December 21, 2020, 10:05:50 pmI suspect it's a typo and actual part is 1N4148.

author: wraper
author_rank: Unknown
timestamp: December 21, 2020, 11:01:28 pm
content: 1N1418 is a big clunky 10W zener diode which is obsolete, suggested replacement from Microsemi is 1N2979

author: CaptDon
author_rank: Super Contributor
timestamp: December 21, 2020, 11:35:18 pm
content: I still keep one of the last published ECG-Sylvania/NTE NewTone Electronicscross reference guides as well as all 3 of their published data books on theirproducts. They still have an online cross-reference service, but it was neveras good as the published stuff. My cross-reference is 1996 edition and I stilluse it when repairing amplifiers and so forth. I have homebrewed a lot ofprojects using ECG/NTE parts!!!

author: bdunham7
author_rank: Super Contributor
timestamp: December 21, 2020, 11:41:50 pm
content: Quote from: tomoram on December 21, 2020, 10:05:50 pmParts sourcing isn't a nightmare, but rather a complex task that requires effort and experience. If you start by assuming it should be trivially easy, you'll be disappointed.Are you sure about that part number? Show us the design or how it is used. One of the issues that I run into in what I do (repairing things) is that the parts may be obsolete and there may not be an exact equivalent. It is not possible to do an exact cross-reference for a given part, because a substitute that works well in one application may fail in another. If you are working with old designs, you may have the same issues--try and stay with current designs if you don't want to spend all that much time and effort sourcing parts.

author: JustMeHere
author_rank: Frequent Contributor
timestamp: December 21, 2020, 11:45:53 pm
content: https://www.ultralibrarian.com/might be something that can help.

author: jlo
author_rank: Newbie
timestamp: December 22, 2020, 06:24:45 am
content: I usehttps://octopart.com/

author: tomoram
author_rank: Contributor
timestamp: December 22, 2020, 11:58:51 am
content: Quote from: bob91343 on December 21, 2020, 10:41:14 pmI look forward to that day, currently it feels like a huge struggle.Quote from: bob91343 on December 21, 2020, 10:41:14 pmNo after reviewing I'm certain it's an incorrect part number and 1N4148 may be the correct one.Quote from: bob91343 on December 21, 2020, 10:41:14 pmThose sound like gold.Quote from: wraper on December 21, 2020, 10:43:54 pmI think you are correct.Quote from: wraper on December 21, 2020, 11:01:28 pmIt's definitely not that, so assuming it's a typoQuote from: bdunham7 on December 21, 2020, 11:41:50 pmI'm sure it's gets easier with experience, but as a new comer, it feels harder that it should be with the modern web.Quote from: JustMeHere on December 21, 2020, 11:45:53 pmThanks.Quote from: jlo on December 22, 2020, 06:24:45 amThanks.