High Voltage Resistors

[Frithiof Andreas Jensen]

"Palinurus" <trinitite@ev1.net> skrev i en meddelelse
news:10lcklvc6bnaa20@corp.supernews.com...

I am in need of a few resistors, of 1 GOhm and 10 GOhm values, 1%
tolerance or better to 10 kV or better.

Hmm... Caddock comes to mind; Vitrohm(Vishay?) made some Blue film resistors
that would match that description.

The tolerance is a DC value, for moderately fast AC all bets are off due to
capacitive coupling from the resistor to whatever...

 

[Boris Mohar]

On Sun, 26 Sep 2004 12:07:11 -0500, Palinurus <trinitite@ev1.net> wrote:

Their TR10 series was one I was looking at, but finding someone who
actually stocks the requisite values is hard. I've been given a solution
to the 1G problem, but if I can avoid spending $50 for the 10G, that
would certainly be a consideration.

I had good luck with

http://www.kandm.com/resistors.asp




Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs http://www3.sympatico.ca/borism/

 

[Robert Baer]

Palinurus wrote:

Guy Macon wrote:

Palinurus <trinitite@ev1.net> says...

I am in need of a few resistors, of 1 GOhm and 10 GOhm values, 1%
tolerance or better to 10 kV or better. I'm also looking for something
that's actually in stock, without a special order, large minimum order
and millennial lead time. In exchange for these unheard-of concessions,
I am willing to pay a moderately extortionate price. Does anyone know of
a source for such things?


Yes. a series string of lower resistance and lower voltage resistors.



An obvious idea. Now take your calculator and figure out just how many
10M resistors I'd have to maze up to get 10G. I'm already using that
scheme to get some lower values. I'm trying to avoid the madness of
tedium and lead fumes, as well as a ridiculously large package. But
thanks for trying.

1% 1206 SMT resistors have the same 200V rating, and are available to
10 megs; that does help the space problem.
But i agree that too many ae needed.
Digikey carries the Ohmite SMD 1W 5% to 50Meg rated at 5KV $1.67@100
(MC102J-value-ND page 972 catalog T043).
Mouser carries Ohmite metal oxide HV resistors: axial to 1000Megs 1%
@5KV (588-MOX series) and planar to 1500Megs 1% @20KV (588-SM series).
Strangely, the planars are also cheaper (page 404 catalog 619).

Seems Mouser hase something closer to your requirements.

 

[Palinurus]

Robert Baer wrote:

Palinurus wrote:

Guy Macon wrote:


Palinurus <trinitite@ev1.net> says...


I am in need of a few resistors, of 1 GOhm and 10 GOhm values, 1%
tolerance or better to 10 kV or better. I'm also looking for something
that's actually in stock, without a special order, large minimum order
and millennial lead time. In exchange for these unheard-of concessions,
I am willing to pay a moderately extortionate price. Does anyone know of
a source for such things?


Yes. a series string of lower resistance and lower voltage resistors.



An obvious idea. Now take your calculator and figure out just how many
10M resistors I'd have to maze up to get 10G. I'm already using that
scheme to get some lower values. I'm trying to avoid the madness of
tedium and lead fumes, as well as a ridiculously large package. But
thanks for trying.


Mouser carries Ohmite metal oxide HV resistors: axial to 1000Megs 1%
@5KV (588-MOX series) and planar to 1500Megs 1% @20KV (588-SM series).
Strangely, the planars are also cheaper (page 404 catalog 619).

Seems Mouser hase something closer to your requirements.

Their SM106031007 is good enough. Don't know how I overlooked it. Thanks.