Need help selecting two alternate capacitors

[AtLarge]

I need alternates for:

Xicon 1429-6223 Film Capacitors 630V .022uF 10% Tol MPP

and

Xicon 1429-2473 Film Capacitors 250V .047uF 10% Tol MPP

The minimum order on these are 1000 pieces and 17 weeks lead time so, that's out since I am just trying to help a friend get his bike running by building him some CDI replacements.

I used Mousers website and found these:

Cornell Dubilier - CDE DMT6S22K-F Film Capacitors .022UF 600V 10%

and

Vishay / BC Components BFC246753473 Film Capacitors .047uF 10% 250volts

Do these look acceptable or can anyone recommend better components that are readily available? 

[Zero999]

Please provide more information.

Do they have to fit the same PCB?

The CDE DMT6S22K-F has a lead spacing of 17mm vs the 10mm of the Xicon 1429-6223.

The BFC246753473 is taller higher than the Xicon 1429-2473 at 14.1mm vs 10mm.

Going by your post, may seem like the CDE DMT6S22K-F has a lower voltage rating than the Xicon 1429-6223 , but according to the Mouser website, it's the same DC rating, so they're probably both rated to 600VAC.

https://www.mouser.co.uk/ProductDetail/Xicon/1429-6223?qs=GUzdjE0gwjaZmmIMkFulUA==
https://www.mouser.co.uk/ProductDetail/Cornell-Dubilier-CDE/DMT6S22K-F?qs=nw6WWA1Y0KZtGODGMpRBVg==

https://www.mouser.co.uk/ProductDetail/Xicon/1429-2473?qs=iob5vsyN1w%252Bq4Fga5HXNwQ==
https://www.digikey.ee/product-detail/en/vishay-bc-components/BFC246753473/BFC246753473-ND/5369434

Electrically the capacitors you've selected seem suitable, but whether they'll fit mechanically, is another matter.

[wraper]

0.022uF https://eu.mouser.com/ProductDetail/WIMA/MKP4J022203C00KI00?qs=sGAEpiMZZMv1cc3ydrPrF7l45uRd9dVhFng1UoSpaME%3D
0.047uF mouser.com/ProductDetail/WIMA/MKP1F024703C00KI00?qs=sGAEpiMZZMv1cc3ydrPrF2CPLAojp4yWN4IXJCQeiok%3D

Both have the same lead spacing and voltage spec. Size is almost the same, some dimensions a little bit smaller so will fit fine.

[wraper]

but according to the Mouser website, it's the same DC rating, so they're probably both rated to 600VAC.

Unlikely. AC rating is usually about 40-70% of DC rating when given at all. Almost the same AC rating is very unusual. EDIT: if you look into datasheet, there is no AC rating at all. But digikey shows 250 VAC https://www.digikey.at/product-detail/en/cornell-dubilier-electronics-cde/DMT6S22K-F/338-4501-ND/10058524.

[floobydust]

Just sort PP film caps by lead spacing 10mm. I would substitute boxed PP film capacitors with 10mm lead spacing, i.e.
EPCOS/TDK B32671L6473K000
EPCOS/TDK B32671L6223K000

Most are rated i.e. 630VDC and 250-280VAC. Have to see the CDI schematic if they have high pulse load or peak voltages.

Mouser seems to have many typos and dud part numbers i.e. giving 222 when it should be 223 for 0.022uF

[AtLarge]

I appreciate your help guys.  Here's the schematic I'm working off of.



I wasn't too concerned about the lead dimensions since I'll be using a hobby prototype PCB and I can adjust accordingly.  It's not optimum but, we just want to get it running first so, cheap is ok and I have to build 3 of them.

If they pass functional testing then I might look into having a real Gerber and boards made.  These CDI boxes are terribly expensive used and NOS if you can find them is crazy money.

[floobydust]

It's worth doing a pcb design for, some new replacements going for $250-$425 ouch.

I would say only the 47nF cap at the SCR gate can be a smaller low voltage part 50V. The others 3uF and 0.033uF should be 630V. Although this guy used 3uF but only 450V EPCOS, they will take 120% for short times 540V and the SCR is 600V.
All-In-One CDI Unit for the H2 and H1D Price: $249 each, 5 year warranty pics attached
Kawasaki Triples CDI

[Zero999]

but according to the Mouser website, it's the same DC rating, so they're probably both rated to 600VAC.

Unlikely. AC rating is usually about 40-70% of DC rating when given at all. Almost the same AC rating is very unusual. EDIT: if you look into datasheet, there is no AC rating at all. But digikey shows 250 VAC https://www.digikey.at/product-detail/en/cornell-dubilier-electronics-cde/DMT6S22K-F/338-4501-ND/10058524.

Yes, there's a mistake on the Mouser website, which I failed to spot. 70% of the DC rating makes sense, as it's 1/root(2), but lower is also possible since it might not be rated for the current, which will flow due to the mains.

Unfortuantely the link I posted previously didn't work. Try this one: DMT6S22K-F . It says 600VAC, 630VDC.

The data sheet on Cornell Dubilier's website doesn't specify the AC voltage, but this one does and agrees with Digikey on 250VAC.
http://pdf.eepw.com.cn/D20101213/d7ac661e6f17f33bcc55b421f1a03d0c.pdf

I wasn't too concerned about the lead dimensions since I'll be using a hobby prototype PCB and I can adjust accordingly.  It's not optimum but, we just want to get it running first so, cheap is ok and I have to build 3 of them.

If they pass functional testing then I might look into having a real Gerber and boards made.  These CDI boxes are terribly expensive used and NOS if you can find them is crazy money.

You could made footprints for the largest capacitors you can find and put additional  holes to accommodate smaller components, if necessary.