[Amps] HV Diodes
KA4INM radio
ka4inm at gmail.com
Wed Oct 8 09:36:35 EDT 2014
On 10/08/14 06:35, Chris Wilson wrote:
When companies pot a string of 1N4007's (1 kV at 1 Amp) they rate the
string at .75 Amp. The diodes, lacking the posts or copper foil to act
as heat sinks, run hotter when potted. Short leads to the circuit board
copper conduct heat away from the silicon die better than long leads.
> Hello Han,
>
> On Wednesday, October 8, 2014, you wrote:
>
>> hi George-san and all
>
>> I think HV6-1 is equivalent to GI HVPR10-MX12.
>
>> I have measured forward voltages of these diode modules
>> using a CVCC power supply with 100-mA current.
>
>> Assuming each of the diode in a string exhibits 0.7 V forward
>> voltage one can presume how many series diodes are in
>> the module.
>
>> GI HVPR10-MX12 6.36 V: 9 diodes
>> EDHD 15k 10.67 V per a leg: 15 diodes x 2 (which I am using)
>> SEMITECH KV-PAC SDHD-15k 12.97 V per a leg: 18 diodes x 2
>> Toshiba S5166A (13 kV 500 mA) 14.0 V: 20 diodes
>
>> I think 10 x 1kV 1A diodes in series is OK as an alternative.
>
>> de Han JE1BMJ
>
> Has anyone experimented with home "potting" diode strings to make
> their own blocks? I am curious about diode lead length, physical
> orientation, and potting compound used. thanks.
--
Ron KA4INM - Youvan's corollary:
Every action results in unwanted side effects.
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