2.1x5.5mm DC Jacks and Plugs - Page 1
Forum section: electronics / projects

author: Zinger
author_rank: Contributor
timestamp: April 15, 2017, 10:08:04 pm
content: Hopefully, this isn't the most n00b question ever, but why are 2.1mm jacks so hard to find?When I search Digi-Key for in-line, 2.1x5.5mm plugs, there are 17 items ranging from 5 to 8A from several manufacturers.https://www.digikey.com/products/en/connectors-interconnects/barrel-power-connectors/435?k=&pkeyword=&pv1989=0&pv28=329&pv29=2&pv1954=28&pv69=185&FV=ffe001b3&mnonly=0&newproducts=0&ColumnSort=0&page=1&stock=1&quantity=0&ptm=0&fid=0&pageSize=25When I search for the equivalent jack, I get 2 items both with an industrial looking "solder cup" connector.https://www.digikey.com/products/en/connectors-interconnects/barrel-power-connectors/435?k=&pkeyword=&pv1989=0&pv28=381&pv29=1&pv1954=28&pv69=185&FV=ffe001b3&mnonly=0&newproducts=0&ColumnSort=0&page=1&stock=1&quantity=0&ptm=0&fid=0&pageSize=25It's the same thing on Mouser.eBay has plenty of jacks, but they don't list amp ratings and there's never a data sheet.Why the difference? Shouldn't there be a jack for every plug and a plug for every jack?

author: Monkeh
author_rank: Super Contributor
timestamp: April 15, 2017, 10:49:53 pm
content: Why are you looking for in-line jacks?While you're at it, try 2.0x5.5mm: The male pin does need to be smaller than the hole it goes into.

author: Zinger
author_rank: Contributor
timestamp: April 15, 2017, 10:58:09 pm
content: I'm wiring a control circuit between a power supply and an LED strip. The LED strip has a 2.1x5.5mm plug.

author: mariush
author_rank: Super Contributor
timestamp: April 15, 2017, 10:58:30 pm
content: Newark has a bunch of them :http://www.newark.com/w/c/connectors/power-entry-connectors/dc-power-connectors-barrel-plugs-jacks?barrel-inner-diameter=2.1mm

author: Monkeh
author_rank: Super Contributor
timestamp: April 15, 2017, 10:59:15 pm
content: Quote from: Zinger on April 15, 2017, 10:58:09 pmRight, but.. why do you need the jack flapping around in the breeze?

author: Monkeh
author_rank: Super Contributor
timestamp: April 15, 2017, 11:04:43 pm
content: Quote from: Zinger on April 15, 2017, 11:02:17 pm.. Carry what, pretty much the same assortment of 2.1x5.5mm plugs you linked to?If you're looking for an in-line jack for some reason, search for 2.0x5.5mm. If you want a panel or board mounted jack,remove the in-line mounting filterand search for 2.0x5.5 and 2.1x5.5mm. Digikey have many.

author: Zinger
author_rank: Contributor
timestamp: April 15, 2017, 11:11:08 pm
content: Everything is going to be enclosed but I need to be able to swap the battery pack easily. So I need the 2.1mm jack/plug to get power in. I could solder the LED directly to the control circuit.

author: Monkeh
author_rank: Super Contributor
timestamp: April 15, 2017, 11:12:30 pm
content: Quote from: Zinger on April 15, 2017, 11:11:08 pm..Perhaps a link speaks a thousand words.https://www.digikey.com/products/en/connectors-interconnects/barrel-power-connectors/435?k=&pkeyword=&pv28=381&pv1954=25&pv1954=42&pv1954=28&FV=ffe001b3&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25