Now _That's_ a Transistor!

[Watson A.Name - \"Watt Su]

Now _That's_ a Transistor! </Crocodile Dundee>

Seems like it's in demand: 13 bidders want it at this time, with
about 3-1/2 days to go.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3854825655&ssPag
eName=STRK:MEWA:IT

Datasheet at
http://www.eupec.com/gb/2_PRODUCTS/2_1_ProductRange/pdf/fz1800r17kf6c_b2
_v.pdf


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[Fred Bartoli]

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> a
écrit dans le message de news:10qas6u5sd4738@corp.supernews.com...

Now _That's_ a Transistor! </Crocodile Dundee

Seems like it's in demand: 13 bidders want it at this time, with
about 3-1/2 days to go.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3854825655&ssPag
eName=STRK:MEWA:IT

Datasheet at
http://www.eupec.com/gb/2_PRODUCTS/2_1_ProductRange/pdf/fz1800r17kf6c_b2
_v.pdf

Too bad he doesn't sell four.
Had he, I could build my new phone amplifier prototype.

Really bad.


--
Thanks,
Fred.

 

[Hans Summers]

I heard the heatsink weighs in at several tons...

"Fred Bartoli"
<fred._canxxxel_this_bartoli@RemoveThatAlso_free.fr_AndThisToo> wrote in
message news:41a6ea8b$0$23395$626a14ce@news.free.fr...

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> a
écrit dans le message de news:10qas6u5sd4738@corp.supernews.com...
Now _That's_ a Transistor! </Crocodile Dundee

Seems like it's in demand: 13 bidders want it at this time, with
about 3-1/2 days to go.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3854825655&ssPag
eName=STRK:MEWA:IT

Datasheet at
http://www.eupec.com/gb/2_PRODUCTS/2_1_ProductRange/pdf/fz1800r17kf6c_b2
_v.pdf


Too bad he doesn't sell four.
Had he, I could build my new phone amplifier prototype.

Really bad.


--
Thanks,
Fred.

 

[Fred Bartoli]

"Hans Summers" <hans.summers@tudor.com> a écrit dans le message de
news:30oekcF31e1aoU1@uni-berlin.de...

I heard the heatsink weighs in at several tons...

I never said it was for building a walkman or such.


--
Thanks,
Fred.

 

[Norm Dresner]

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> wrote
in message news:10qas6u5sd4738@corp.supernews.com...

Now _That's_ a Transistor! </Crocodile Dundee

Seems like it's in demand: 13 bidders want it at this time, with
about 3-1/2 days to go.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3854825655&ssPag
eName=STRK:MEWA:IT

Datasheet at
http://www.eupec.com/gb/2_PRODUCTS/2_1_ProductRange/pdf/fz1800r17kf6c_b2
_v.pdf

Hey, I can finally throw out all of the old 2N3055s that I was saving for
that stereo amp, huh/

N

 

[Marc H.Popek]

Here are some nice "little" RF transistors.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3855097381&ssPageNam
e=STRK:MESE:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3855292125&ssPageNam
e=STRK:MESE:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3856043724&ssPageNam
e=STRK:MESE:IT



"Fred Bartoli"
<fred._canxxxel_this_bartoli@RemoveThatAlso_free.fr_AndThisToo> wrote in
message news:41a710f7$0$23382$626a14ce@news.free.fr...

"Hans Summers" <hans.summers@tudor.com> a écrit dans le message de
news:30oekcF31e1aoU1@uni-berlin.de...

I heard the heatsink weighs in at several tons...



I never said it was for building a walkman or such.


--
Thanks,
Fred.

---
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Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.726 / Virus Database: 481 - Release Date: 7/22/2004

 

[Watson A.Name - \"Watt Su]

"Fred Bartoli"
<fred._canxxxel_this_bartoli@RemoveThatAlso_free.fr_AndThisToo> wrote in
message news:41a6ea8b$0$23395$626a14ce@news.free.fr...

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com
a
écrit dans le message de news:10qas6u5sd4738@corp.supernews.com...
Now _That's_ a Transistor! </Crocodile Dundee

Seems like it's in demand: 13 bidders want it at this time, with
about 3-1/2 days to go.


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3854825655&ssPag
eName=STRK:MEWA:IT

Datasheet at

http://www.eupec.com/gb/2_PRODUCTS/2_1_ProductRange/pdf/fz1800r17kf6c_b2
_v.pdf


Too bad he doesn't sell four.
Had he, I could build my new phone amplifier prototype.

Really bad.

What do you want? The WHOLE WORLD to hear you? (shouting intended!)

I checked a while ago and another bidder had chimed in - I think it was
over $155. I guess if you can afford the electric bill these will
cause, you can afford a couple hundred for the parts themselves. ;-)

--
Thanks,
Fred.

 

[Terry Given]

Marc H.Popek wrote:

Here are some nice "little" RF transistors.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3855097381&ssPageNam
e=STRK:MESE:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3855292125&ssPageNam
e=STRK:MESE:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3856043724&ssPageNam
e=STRK:MESE:IT

No, THIS is a transistor

http://www.eupec.com/gb/2_PRODUCTS/2_1_ProductRange/pdf/db_fz600r65kf1.pdf

How about the transistor Rthetajc = 0.011C/W

tha case Rthetacs = 0.006C/W

So for a 50C junction temperature rise above ambient this can dissipate
3kW - which is about 600A when ON (Vce = 5V).

Oh yeah, it weighs 1.4kg


Cheers
Terry

 

[Jamie]

Terry Given wrote:

Marc H.Popek wrote:

Here are some nice "little" RF transistors.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3855097381&ssPageNam

e=STRK:MESE:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3855292125&ssPageNam

e=STRK:MESE:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3856043724&ssPageNam

e=STRK:MESE:IT


No, THIS is a transistor

http://www.eupec.com/gb/2_PRODUCTS/2_1_ProductRange/pdf/db_fz600r65kf1.pdf

How about the transistor Rthetajc = 0.011C/W

tha case Rthetacs = 0.006C/W

So for a 50C junction temperature rise above ambient this can dissipate
3kW - which is about 600A when ON (Vce = 5V).

Oh yeah, it weighs 1.4kg


Cheers
Terry
that would make a nice set for an inverter to do 12DC to 120 AC

 

[Terry Given]

Watson A.Name - "Watt Sun, the Dark Remover" wrote:

"Terry Given" <my_name@ieee.org> wrote in message
news:0ZNpd.11872$9A.264964@news.xtra.co.nz...

Marc H.Popek wrote:


Here are some nice "little" RF transistors.


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3855097381&ssPag
eNam

e=STRK:MESE:IT



http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3855292125&ssPag
eNam

e=STRK:MESE:IT



http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3856043724&ssPag
eNam

e=STRK:MESE:IT


No, THIS is a transistor



http://www.eupec.com/gb/2_PRODUCTS/2_1_ProductRange/pdf/db_fz600r65kf1.p
df

How about the transistor Rthetajc = 0.011C/W

tha case Rthetacs = 0.006C/W

So for a 50C junction temperature rise above ambient this can

dissipate

3kW - which is about 600A when ON (Vce = 5V).

Oh yeah, it weighs 1.4kg


Yeah! But what's in them suckers? I've seen single junction
transistors with more than a kV breakdown voltage, but do they use more
than one junction in series in these beasties to get more than 6kV
breakdown?


Cheers
Terry

AFAIK no they dont. Its a single device rated for that voltage, often
with several chips directly paralleled to give the requisite current
capacity. Eupec are basically the world leaders in HV igbt's. Apparently
its not very easy to design these things.

Cheers
Terry

 

[Watson A.Name - \"Watt Su]

"Terry Given" <my_name@ieee.org> wrote in message
news:CO_pd.13877$9A.271955@news.xtra.co.nz...

Hal Murray wrote:

that would make a nice set for an inverter to do 12DC to 120 AC


Major power lines switch to DC and then back to AC at the other end.

What sort of parts do they use? Are they listed in catalogs?
Can I purchase them?


Humungous stacks of SCRs or GTOs all in series, driven by
fibre-optics.
The failure mode of a hockey puck device is short circuit, so they
have
a hell of a lot more than necessary for voltage rating alone, and just
ignore them when they break.

Well, if enough of them go bad, they'll have to replace them -
eventually.

But why FO? You can't transfer electrical energy over fiber. Must be
some photovoltaic or photoresistive device in the thyristor. Or else
they use an electromagnetic coupling.

You can buy them, but they aint cheap. Especially when you want say 1.

www.nteinc.com has those hockewy pucks in their catalog. I've never
priced them, tho. Probably an arm and a leg.

Cheers
Terry

 

[BFoelsch]

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> wrote
in message news:10qh6o7sh7ann98@corp.supernews.com...

"Terry Given" <my_name@ieee.org> wrote in message
news:CO_pd.13877$9A.271955@news.xtra.co.nz...
Hal Murray wrote:

that would make a nice set for an inverter to do 12DC to 120 AC


Major power lines switch to DC and then back to AC at the other end.

What sort of parts do they use? Are they listed in catalogs?
Can I purchase them?


Humungous stacks of SCRs or GTOs all in series, driven by
fibre-optics.
The failure mode of a hockey puck device is short circuit, so they
have
a hell of a lot more than necessary for voltage rating alone, and just
ignore them when they break.

Well, if enough of them go bad, they'll have to replace them -
eventually.

But why FO? You can't transfer electrical energy over fiber. Must be
some photovoltaic or photoresistive device in the thyristor. Or else
they use an electromagnetic coupling.

They use FO so the control circuitry can be at earth potential. The
thyristor module (or assembly) has a photoreceiver connected to the controls
over FO. You just make the FO long enough to make it safe, which may be 50
feet or so. Same technique is used for 13,000 volt variable frequency motor
controllers. Nice, clean way to do it. The old ones did use transformers.
Guess what always failed?

You can buy them, but they aint cheap. Especially when you want say 1.

www.nteinc.com has those hockewy pucks in their catalog. I've never
priced them, tho. Probably an arm and a leg.

Cheers
Terry

 

[Hal Murray]

Humungous stacks of SCRs or GTOs all in series, driven by fibre-optics.
The failure mode of a hockey puck device is short circuit, so they have
a hell of a lot more than necessary for voltage rating alone, and just
ignore them when they break.

How do they match the voltage across the elements of a big stack?

How much power does it take to turn on each hockey puck? Are
they sending significant energy through the fiber or just a control
signal and getting the energy off the main voltage?

Is there a good writeup on the net? (Sounds like good bait
for Scientific American or IEEE Spectrum.)


--
The suespammers.org mail server is located in California. So are all my
other mailboxes. Please do not send unsolicited bulk e-mail or unsolicited
commercial e-mail to my suespammers.org address or any of my other addresses.
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[Terry Given]

BFoelsch wrote:

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> wrote
in message news:10qh6o7sh7ann98@corp.supernews.com...

"Terry Given" <my_name@ieee.org> wrote in message
news:CO_pd.13877$9A.271955@news.xtra.co.nz...

Hal Murray wrote:


that would make a nice set for an inverter to do 12DC to 120 AC


Major power lines switch to DC and then back to AC at the other end.

What sort of parts do they use? Are they listed in catalogs?
Can I purchase them?


Humungous stacks of SCRs or GTOs all in series, driven by

fibre-optics.

The failure mode of a hockey puck device is short circuit, so they

have

a hell of a lot more than necessary for voltage rating alone, and just
ignore them when they break.

Well, if enough of them go bad, they'll have to replace them -
eventually.

True. The trick is to do it when it is convenient, rather than
necessary. Add in enough spares, and whenever you have a Periodic
Maintenance shutdown, the inverter can be repaired. Otherwise when it
breaks the grid goes off-line, and it needs to be repaired NOW.

But why FO? You can't transfer electrical energy over fiber. Must be
some photovoltaic or photoresistive device in the thyristor. Or else
they use an electromagnetic coupling.


They use FO so the control circuitry can be at earth potential. The
thyristor module (or assembly) has a photoreceiver connected to the controls
over FO. You just make the FO long enough to make it safe, which may be 50
feet or so. Same technique is used for 13,000 volt variable frequency motor
controllers. Nice, clean way to do it. The old ones did use transformers.
Guess what always failed?

Yep. 1MV inverters need a LOT of creepage and clearance. And of course
there is always the LASCR = Light Activated SCR.

You can buy them, but they aint cheap. Especially when you want say 1.

www.nteinc.com has those hockewy pucks in their catalog. I've never
priced them, tho. Probably an arm and a leg.

Cheers
Terry