1n5399 vs 1n4007 for diode stack / High Voltage / Forums

Forums

4hv.org :: Forums :: High Voltage

« Previous topic | Next topic »

1n5399 vs 1n4007 for diode stack

1 2 3 4 next

Move Thread

LAN_403

Matt Edwards

Fri Aug 27 2010, 02:56AM

Registered Member #2838 Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333

Could someone please tell me the benefits or drawbacks of using either the 1N5339 or 1N4007 diodes for a 50k stack.

I would like to make a few 50-60k diode stacks for a Cock-croft Walton generator, Marx generator or any other HV project that I may be playing with in the near future.

I have seen a lot of people using the 1N4007 but not the 1N5339. I understand insulating issues. i was just wondering if one would be significantly better than the other. The 1N5339 recovery time is listed as 2us and has a higher current rating but I could not find a recovery time listed for the 1N4007.

Also, I was wondering if anyone thought it would be worth spending the extra money buying the UF4007's or SF1600's which were suggested to me in a prior thread.

Patrick

Fri Aug 27 2010, 03:47AM

Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639

hey buddy.
you wont be able to find the 1n4007 Trr numbers easily. i and others have found that they are General Purpose and are consistently rated at 2uS Trr, also these are not avalanche rated the SF1600 are. the SF stands for Super Fast i think? the 1n40XX series are made by many companies for line freqs and relatively commmon switch DC low speed apps, (less than 100kHz) i have used them at higher freqs, but they seem less effcient.

did you really mean the 1n5339, it seems to be a zener?! i think you mean 1n5399 as in the title of the thread.
if the 1n5399's are equivelent to the RGP30M's.

in any case the SF1600 is far superior to the 1n5399 or 1n4007, you wont blow stacks with the sf1600's and YOU WILL WITH THE 1n4007's. whatever your choice... choose your components and design caerfully.

EDIT: also i couldnt afford my favorites the SF1600's so i went with a boatload of HER108's which are way faster then the 1n4007 or 1n5399's and cheap when baught 1200 at a time from mouser, the her108 are not avalanche rated though, and thats a loss, but ill live with it. my purpose is a full wave CW like others.

EDIT 2:the UF4007's are Ultra FAst 1n4007's i think thats 500ns or better let me check ...
and some 1n4007's were listed as 150nS !? i am suspicious (chinese knock off?)

]1n4001-1n4007do-41_mcc_diodes.pdf[/file]
this 1N4007 was 2us,

]1n4004-general.pdf[/file]
this one was 30uS!?,

]her108_diode.pdf[/file]
this is the type i used for my CW.

the UF4007 is 75 nS... typical for most manufactures

HV Enthusiast

Fri Aug 27 2010, 11:54AM

Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068

Patrick wrote ...

EDIT: also i couldnt afford my favorites the SF1600's so i went with a boatload of HER108's which are way faster then the 1n4007 or 1n5339's and cheap when baught 1200 at a time from mouser, the her108 are not avalanche rated though, and thats a loss, but ill live with it. my purpose is a full wave CW like others.

If your not going to use all those free HV diodes I sent you, then i'd appreciate it if you can send them back as I have another student that has been asking for diodes for a similar purpose.

Also, i'm not sure if its a "your generation" thing or not, but its considered polite to actually send a confirmation as well as "thank you" when you receive free stuff. It didn't go over too well when i sent you all those HV diodes and never received an email from you afterwards.

So if you're not using them, please send them back to me so i can give them to another student that needs them for his project.

Patrick

Fri Aug 27 2010, 12:38PM

Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639

i have used the RGP30M's on a high current Bridge and fullwave CW and then some SMPS's there are just a few left and i need the last 7 as spares. the HER108 are next, if i have 200-300 left ill send them to Odium or to you. im sorry about not emailing you, you could have reminded me by private message here on the forum, and i would have set things right with you.

Plasmana

Fri Aug 27 2010, 12:42PM

Registered Member #3108 Joined: Thu Aug 12 2010, 05:37PM
Location: Worthing, England
Posts: 72

Could someone please tell me the benefits or drawbacks of using either the 1N5339 or 1N4007 diodes for a 50k stack

Do you really mean 1N5339? because when i search datasheet for it, it turns out to be a 5.6v 5W zener diode...

Patrick

Fri Aug 27 2010, 01:02PM

Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639

yeah Plasmana, he meant 1n5399. this confused the hell out of me too.

anyway, the rgp30m and 1n5399 are not entirely equivelent.

]1n5399_diode_fairchild.pdf[/file]
]rgp30m_diode.pdf[/file]
]uf4007_fairchild.pdf[/file]

if i had to go with any of the ones you listed odium45 (1n5399, 1n4007, or uf4007) i would use the UF4007's they'll be cheap and plentiful, if you treat them carefully in your stack they'll have a usefull lifespan.

the one thing you didnt say was the freq youll be driving them at, i meant to ask you that last night. i assumed youd be driving them at 10kHz+, if you meant 60Hz out of the wall then just use the 1n4007's. also if youre pushing near the limits of Trr and/or max voltage you should use capacitor-resistor strings in parallel with your diode strings.

ok back to my calculus home work now...

radiotech

Fri Aug 27 2010, 03:58PM

Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546

Here is what Fairchild published in 1978 in the DIODE DATA BOOK.

Measuring circuit shown. ( Interesting how they used a relay in the place of an igbt) Is there some magic happening at the mercury
wetted contacts?

Patrick

Fri Aug 27 2010, 05:54PM

Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639

Radiotech's scan shows the 1n4007 diode specked at 1.0uS Trr for 1amp conduction, thats interesting that they apparently vary widely in Trr.

Also, could you elaborate on what your implication was when you said" magic at the mercury contacts" for those of us young ones, too young to know much about relays.

Matt Edwards

Fri Aug 27 2010, 07:41PM

Registered Member #2838 Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333

Thank you all for the helpful advice! I am considering the sf1600's if I can find someone selling them with less than a two month backorder... I will be driving them with a pretty basic DVD driver and a large NOS 1961 flyback. I am unsure what the frequency will be. I have not begun to setup the circuit yet.

teravolt

Fri Aug 27 2010, 07:49PM

Registered Member #195 Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111

I have tried 1n4007 and they work for my cocroft walton voltage multiplier that is powered by my flybacks. I am not shure wether fast recovery will be better genral purpace . I do believe that flybacks don't run faster than 40khz so will a 1us trr matter. I had broght it up in a earlier thread because it works and is afordible.

1 2 3 4 next

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob