Where can I get one of these voltage regs please?  Searched RS etc with no luck - Page 1
Forum section: electronics / beginners

author: HobGoblyn
author_rank: Unknown
timestamp: August 13, 2020, 08:38:13 am
content: It's off a recliner chair circuit board, no schematic.The writing on it says S1142A 501VD2 0999Mouser has a load of S1142A but I'm not sure how to choose the right one.Thanks

author: RobBarter
author_rank: Regular Contributor
timestamp: August 13, 2020, 08:44:54 am
content: A good start might be with mouser.https://www.mouser.co.uk/ProductDetail/ABLIC/S-1142D50I-E6T1U?qs=sGAEpiMZZMug9GoBKXZ754tOPnFKpnCUTUujZVrC6T3GUxS1s1sykg%3D%3DAlthough probably not that exact one. At least they stock the range.

author: HobGoblyn
author_rank: Unknown
timestamp: August 13, 2020, 08:46:22 am
content: Quote from: RobBarter on August 13, 2020, 08:44:54 amHehe, just found them while you were typing.I'm still fairly new to this hobbyThanks

author: HobGoblyn
author_rank: Unknown
timestamp: August 13, 2020, 08:50:01 am
content: I see they come from overseas so will take a while to get here. Any equivalents at the likes of Farnell or RS please?Thanks

author: RobBarter
author_rank: Regular Contributor
timestamp: August 13, 2020, 08:50:24 am
content: The 'A' in the part name is significant. Check the datasheet.https://www.mouser.co.uk/datasheet/2/360/S1142A_BxxH_E-1109281.pdfAnd I'm sure there are more qualified people than me to suggest a direct replacement.See page 3 of the specs to decipher the part codeProduct type:A: ON / OFF pin negative logicB: ON / OFF pin positive logic

author: RobBarter
author_rank: Regular Contributor
timestamp: August 13, 2020, 09:13:44 am
content: I think the S-1142C range is the one you want. The A series looks to be discontinued. Flicking from one spec sheet to the other shows them almost identical.https://www.ablic.com/en/doc/datasheet/voltage_regulator/S1142C_D_E.pdfDigikey UK have stock:https://www.digikey.co.uk/products/en?keywords=S-1142C50I-E6T1U

author: HobGoblyn
author_rank: Unknown
timestamp: August 13, 2020, 01:45:47 pm
content: Grr, they want £12 + VAT delivery and takes estimated 4 days from the US. Was hoping to get recliner chair fixed for the weekendI'll have to find another £30 worth of stuff to find to get free delivery, was happy to pay £5 for next day but not paying £12 on a part that costs £1.16Many thanks for your help, much appreciated

author: HobGoblyn
author_rank: Unknown
timestamp: August 13, 2020, 04:00:03 pm
content: Hehe, initially after a part costing £1.16, end up spending £45

author: Bud
author_rank: Super Contributor
timestamp: August 13, 2020, 04:17:20 pm
content: I stopped worrying about gas price and parts delivery fees long time ago. Made my life much better.

author: themadhippy
author_rank: Super Contributor
timestamp: August 13, 2020, 04:59:28 pm
content: Quotefactor in another 15 quid or so for vat/import tax/just cause we can tax and the royal mails rip off fee for collecting the tax,you might get lucky and it slips through,but can come as a bit of a shock if your not expecting it

author: HobGoblyn
author_rank: Unknown
timestamp: August 13, 2020, 05:06:39 pm
content: Quote from: themadhippy on August 13, 2020, 04:59:28 pmI had to get it to £33 to get free delivery, then vat was added to the total. According to digikey, duty and customs are paid by them. I've ordered off them a few times in the past, never had a problem, you've probably jinxed me nowThen it will turn out that voltage reg wasn't the problem anyway

author: ogden
author_rank: Super Contributor
timestamp: August 13, 2020, 05:12:48 pm
content: https://www.findchips.com/search/S1142A

author: HobGoblyn
author_rank: Unknown
timestamp: August 18, 2020, 09:42:18 am
content: Quote from: themadhippy on August 13, 2020, 04:59:28 pmIt got to Norwich which is 15 miles away by midday Sunday. Monday got a UPS message saying due to operational problems they have had to reschedule my delivery. It turned up 10 mins ago (Tuesday)I don't think anyone has extra tax etc added by UK customs when ordering from Digikey?

author: HobGoblyn
author_rank: Unknown
timestamp: August 18, 2020, 02:48:47 pm
content: I was right, voltage reg wasn't the problem after all thatBack to the drawing board. Should have done more tests before I ordered it. Voltage reg gets very hot (as in if I put freeze spray, that instantly defrosts) and being the newbie I am, I thought that must be the fault.I now (again with my limited knowledge) thing there's a short to ground. On the voltage reg, pin 6 is input voltage, pin 1 is output. But pin 1 goes to ground (along with pins 2,3,4 and 5).