I need some 500v screw type capacitors. Kemet any good?

[Cartel]

I need to replace some caps in a ameritron al1200 and it has CDE screw type with .504" spacing.
I seen these: ALS30A221DE500
Its a bit steep and 200cad for 8

I also seen these: ALC40A221EC500 for half the price.

I'm not sure if the snap-in leads will work in this situation.

Any opinions of kemet and any advice on the fitment?
stock photo of the board I have to work with below.

thanks

[redwire]

Re: I need some 500v screw type capacitors. Kemet any good?

Apparently the equalizing resistors fail, although reforming the bank would be hard to do. I thought the originals are very good quality 210uF 450V Mallory CGS (now owned by CDE) CGS211T450R4C3PH 1-3/8" dia. x 4-1/8" H, ESR 332mΩ 120Hz, 1.9Arms ripple current. The ESR is low compared to other brands. But discontinued, replaced by lower cost, smaller CDE DCMC series. Maybe DCMC241T500AH2B? Or ALS30A221 or ALS40A221 series.

I believe snap-ins don't compare for lifetime because their massive bung doesn't seal as good.
Upgrade board used 10 of 330uF 450V.

I have not used the Kemet can types.

[eccerr0r]

Re: I need some 500v screw type capacitors. Kemet any good?

Did these caps actually fail? This picture is mentioned as a stock photo else I would have wondered how the resistors broke off or probably they were desoldered or something... weird...

[Cartel]

Re: I need some 500v screw type capacitors. Kemet any good?

Hey thanks for the replies.
They havent failed yet but its been 20 years so I thought I should at least buy them before the price triples or they become unavailable.
Digikey has tons of stuff out of stock for a long time now

My 1200 is dated 2002

I should do the resistors too, and even resistors are getting hard to source
https://www.digikey.com/en/products/...X7J51K/9926357

The main reason I'm trying to go 500V is because the 8 x 450 is right at the limit of 3600V but 500v the esr goes up. Is esr critical here? sorry for my ignorance.

[Cartel]

Re: I need some 500v screw type capacitors. Kemet any good?

OK after a peek into the cover holes, I see these are actually 270uf

DCMC271T450AA2B

The reason I usually skip CDE is the low hour rating.
All the other Japanese and kemet are available up to 12000+ hours

but these still work after 20 years so I'm not sure what to do.


oofta $30 each

[Cartel]

Re: I need some 500v screw type capacitors. Kemet any good?

Upgrade board used 10 of 330uF 450V.

I have not used the Kemet can types.

I ended up going with the kemet 330uf 500v
they fit perfect.
I may have made a wrong choice on the resistors though.
Do bleeder resistors need to be non inductive?

I used 50k 10w ohmites
https://www.digikey.ca/en/products/d...0J50KE/2019980