Sub Heatsink for 6 Zener Diodes in DO5 Outline for electric isolated Mounting

[tiefbassuebertr]

I am looking for a possibility of isolated mounting of 6 pcs DO-5 zener diodes one the same heat sink.
The diodes looks like this versions:
1N3309B Z- DIODE 10V 50W DO-5 | Capcomp Shop
NTE Elektronik nte5247ak Zener Diode - 6.8v 50w do-5 5% Cathode Case | eBay
Actually there should be heat sinks for it with one surface accordingly TO247 and one surface with a hole of 5mm Ø

The reason for that is the follow:
In a preamp with shunt regulated power supply there must replace high power zener diodes in an electrical isolated outline like that one from this rectifier:
KBPC3510FP pdf, KBPC3510FP description, KBPC3510FP datasheets, KBPC3510FP view ::: ALLDATASHEET :::
go to the first attachment.

The replacement parts of this zeners are only available in an electrical unisolated DO-5 outline, but I want to fix five or six of this electrical unisolated devices of this zeners on the same heatsink (the last image shows only a temporary solution, which I don't like).

Thanks for an advice.

 

[Johno]

Wow, D05, thats going back a few years. Anyway when I was designing with SCRs et al in those outlines we had mica washers top and bottom with an insulating sleeve over the thread. Am sure that those mounting packs would be still available but finding the source is likely to be a challenge. I will do some digging out of curiosity - might even have some washers left in my junk box.
The one critical mounting rule was to solder the connection before mounting on the heatsink to limit the time and heat applied to the terminal.

 

[tiefbassuebertr]

I have given up screwing this DO-5 outline onto a heat sink in an electrically insulated manner.
That's why I'm looking for five or six independent heat sinks for DO-5 high power diodes resp. rectifiers including an existing thread to screw in.

In the attached image you will find such heat sinks.
But I want to have a bigger version with thread for DO-5 - similar to that one under
https://docs.rs-online.com/9bc9/0900766b8002797e.pdf

Best thanks for an advice.

 

[tiefbassuebertr]

here the wanted heat sink versions:
page 8 under
Redirect Notice
and the heat sinks from the attached images.
Are such heat sinks only currently available in used condition ?

 

[tiefbassuebertr]

this version would be perfect due to the possibility of isolated mounting of 5 pcs in an envelop.