Help! Replacement for RIFA Cap! In a Rapid 106 - Page 1
Forum section: electronics / repair

author: mictas
author_rank: Regular Contributor
timestamp: August 09, 2020, 10:13:52 am
content: Alright, lets get started.What I have is an old Rapid 106 electric stapler, where a Rifi Capacitor has gone boom! and its values are0.047uf+100ohmsX2, PMR 209 MDSo I got on video, the magic smoke coming out from an electric stapler, of all things.Anyway, when I went poking around, I found these and they look like they are a new replacement from the same company, just under a new name.I also wanted to ask, what one I should go with?https://au.rs-online.com/web/p/rc-network-capacitors/2067869/https://au.rs-online.com/web/p/rc-network-capacitors/0209213/this one? only the resistance is less then half.I can't seem to find one with the same values.Here is my YouTube video on the matter:And I have two photos.

author: George Edmonds
author_rank: Frequent Contributor
timestamp: August 09, 2020, 11:03:19 am
content: HiIt looks from the photographs that the RIFA is the least of your problems, what else is going on?The FIFA is a capacitor with a built in series resistor.George G6HIG

author: mictas
author_rank: Regular Contributor
timestamp: August 09, 2020, 11:10:01 am
content: Quote from: George Edmonds on August 09, 2020, 11:03:19 amWell all that happen, was after I used it twice smoke started coming out.Other then that it was working just fine.That white stuff, seems to just be covering a resetable fuse.And the video is working now, watch from 33:36 and you'll see what I mean.

author: Haenk
author_rank: Super Contributor
timestamp: August 09, 2020, 12:42:40 pm
content: do check the Philips as well, there is a 90% chance of it being waaaaay out of specs

author: mictas
author_rank: Regular Contributor
timestamp: August 09, 2020, 09:24:23 pm
content: Quote from: Haenk on August 09, 2020, 12:42:40 pmAnd that sounds like, I'd be better off just replacing it.Thanks.

author: torquil
author_rank: Regular Contributor
timestamp: August 10, 2020, 04:59:49 am
content: Quote from: mictas on August 09, 2020, 10:13:52 amhttps://www.digikey.no/product-detail/no/kemet/P409QM473M275AH101/399-12022-ND/5272237But do double-check that it will fit.

author: mictas
author_rank: Regular Contributor
timestamp: August 10, 2020, 07:27:13 am
content: Quote from: torquil on August 10, 2020, 04:59:49 amOkay, so I looked it up on the Australia site and found thishttps://www.digikey.com.au/products/en?keywords=P409QM473M275AH101as far as I can tell, yes that is the same, I also found it on RS herehttps://au.rs-online.com/web/p/paper-capacitors/8787950/I'm hoping someone else can please look these over and give a yes or no, if this one is a updated replacement?

author: sebouh
author_rank: Newbie
timestamp: August 10, 2020, 09:00:12 am
content: Mictas,The one installed is by RIFA where as the one you want to buy is from KEMET both have the same specs and dimensions.Your Capacitor is 0.047μF 100 ohms and the dimensions according to datasheet 7.3x13.0x18.5mm.RIFA code number for this component is PMR209MB5470M100 (RIFA Datasheet page 2)KEMET code number for this component is P409QM473M275(1)H101 (KEMET Datasheet page 5)For KEMET after 275 the number in bracket (1) is the packaging:-Bulk – Short Leads 6mm = CBulk – Maximum Length Leads 30mm= ATape & Reel (Standard Reel) H0= 18.5mm= LTape & Reel (Large Reel) H0= 18.5mm= PThe one torquil suggested is the same and is for lead length 30mm because after 275 is written A P409QM473M275AH101If you visit Farnell site in Australia and enter RIFA code number this will result to KEMEThttps://au.element14.com/search?st=PMR209MB5470M100. The datasheet on the same page gives both number KEMET Part Number: PMR209MB5470M100R30 (P409QM473M250AH101)https://api.kemet.com/component-edge/download/specsheet/P409QM473M250AH101.pdf.https://au.element14.com/search?st=PMR209MB5470M100Therefore, order above part number or while ordering from another site make sure you select the correct code number.

author: mictas
author_rank: Regular Contributor
timestamp: August 11, 2020, 10:37:11 am
content: Okay, so going on from what Haenk, has said above, I am looking into the little blue cap, that looks undamaged, as I understand it is a philips 030k0.Now, I have found an eBay listing for this cap and I'll post the data I found below, I also found a datasheet herehttps://www.farnell.com/datasheets/12096.pdfWithout looking how its connected, it could be doing one of three things, attached to the power supply, attached to the fiber-optic ports at the rear, or helping with the foot peddle. I will be trying to follow how its connected soon.For now, I found thishttps://au.rs-online.com/web/p/products/1763782/I am not fussed about the form factor and would plan to use heat shrink to help insulate the exposed leads, but I am creating this post, to one not forget and two, asking if anyone else thinks this is a good, drop in replacement?Code:CategoriesALUMINIUM ELECTROLYTIC CAPACITORSManufacturerVishay BC ComponentsSeries030 ASPackagingTape & Box (TB)Part StatusActiveCapacitance47µFTolerance-10%, +50%Voltage - Rated25VESR (Equivalent Series Resistance)4.8 Ohm @ 100HzLifetime @ Temp.3000 Hrs @ 85°COperating Temperature-40°C ~ 85°CPolarizationPolarRatings-ApplicationsGeneral PurposeRipple Current @ Low Frequency100mA @ 100HzImpedance1.9 OhmsLead Spacing-Size / Dimension0.236" Dia x 0.394" L (6.00mm x 10.00mm)Height - Seated (Max)-Surface Mount Land Size-Mounting TypeThrough HolePackage / CaseAxial, Can

author: mictas
author_rank: Regular Contributor
timestamp: August 11, 2020, 10:47:56 am
content: Quote from: sebouh on August 10, 2020, 09:00:12 amThank you for that, I have found 'the part' you have suggested and after looking close at the image, it has the same values as the one that smoked.

author: Haenk
author_rank: Super Contributor
timestamp: August 12, 2020, 01:59:15 pm
content: Quote from: mictas on August 11, 2020, 10:37:11 amI'd say this one is uncritical per se - look for a 105oC part though, so you probably have a good 10-20 year life span of it. It's probably a good idea to use a higher voltage-rated one, too. There should be enough space to fit it in.However the axial parts are only available in limited flavours, so if you end up with this Vishay part, that's still OK.