scr

[Peter]

What does the Ifsm rating of an scr mean?

 

[Phil Allison]

"Peter"

What does the Ifsm rating of an scar mean?

** I = current, f = forward, s = single, m = maximum.


Generally it refers to the largest, once in a while, *half cycle 50/60 Hz *
current pulse allowable.





......... Phil

 

[Peter]

"Peter"



** I = current, f = forward, s = single, m = maximum.


Generally it refers to the largest, once in a while, *half cycle 50/60 Hz
* current pulse allowable.





........ Phil

Thanks
So I have a power supply that has a zener diode across the output to
trigger an SCR in the event of over voltage.......
The power supply's fuse is , say 10 amp. Does the SCR's rating have to be
at least 10 amp or will a lower rating one do given that the fuse in the
event of a short to ground through the SCR will fail pretty quickly

Peter

 

[Phil Allison]

"Peter"

** Knew there was a catch to this.

Post the full schematic and all the details an ABSE.

Or else piss off .






........ Phil

 

[Mike]

So I have a power supply that has a zener diode across the output to
trigger an SCR in the event of over voltage.......
The power supply's fuse is , say 10 amp. Does the SCR's rating have to be
at least 10 amp or will a lower rating one do given that the fuse in the
event of a short to ground through the SCR will fail pretty quickly

Semiconductors are well known for being great fuse protectors !

So in your sentence above you are speculating a lower rated SCR will
not fail (or presumably encounter any harm) whilst the fuse will, by
maybe restating the question and critiquing your own logic you may
well have answered it.


--
Regards
Mike
* GMC/VL Commodore, Calais VL Turbo FuseRail that wont warp or melt !
* High grade milspec ignition driver electronics now in development
* Twin Tyres to suit most sedans, trikes and motorcycle sidecars
Web site under construction http://niche.iinet.net.au

 

[Peter]

Post the full schematic and all the details an ABSE.

Or else piss off .

Yeah OK, but what's with the piss off bit?
Is there some unwritten rule about posting to this NG that I've missed
somewhere?

 

[Phil Allison]

"Peter"

Yeah OK, but what's with the piss off bit?

** Cos YOU are bloody TROLLING !!!!!







....... Phil

 

[Peter]

** Cos YOU are bloody TROLLING !!!!!

How is a request for information trolling?
The power supply in question is a Johnson Unit that I've repaired for a
friend.
http://members.ozemail.com.au/~pebarhug/radios/Johnson_1.jpg
The semiconductors only had in house type numbers on them.
My p was a genuine question. What seems elementary to you is not to me.

 

[Phil Allison]

"Peter"

What does the Ifsm rating of an scr mean?


** I = current, f = forward, s = single, m = maximum.

Generally it refers to the largest, once in a while, *half cycle 50/60 Hz *
current pulse allowable.

So I have a power supply that has a zener diode across the output to
trigger an SCR in the event of over voltage.......

** Knew there was a catch to this.

Post the full schematic and all the details an ABSE.

Or else piss off .

Yeah OK, but what's with the piss off bit?

** Cos YOU are bloody TROLLING !!!!!


** DO NOT snip out the context - arsehole !

YOU are bloody TROLLING !!

YOU are wasting people's valuable time and abusing their good will.

If YOU have no FUCKING idea how to design things or do repairs - that is
100% YOUR problem !!!

Go annoy the wankers at "sci.electronics.design or "
sci.electronics.repair."








....... Phil

 

[Peter Howard]

How is a request for information trolling?
The power supply in question is a Johnson Unit that I've repaired for a
friend.
http://members.ozemail.com.au/~pebarhug/radios/Johnson_1.jpg
The semiconductors only had in house type numbers on them.
My p was a genuine question. What seems elementary to you is not to me.

Peter,
Is that Phil Allison you are having a discussion with?
If so, you are wasting your time trying to reason with him. Just killfile
the graceless prick. I did, six months ago and have not missed him.
His technical knowledge is quite good but he turns to psychotic abuse for no
reason. Or maybe his reason is the gratification of getting a shocked
reaction. Whatever. He is a troll and is not worth your trouble.

PH

 

[Phil Allison]

"Peter Howard"


** Piss off - you know nothing IDIOT.





....... Phil

 

[Peter]

Peter,
Is that Phil Allison you are having a discussion with?
If so, you are wasting your time trying to reason with him. Just killfile
the graceless prick. I did, six months ago and have not missed him.
His technical knowledge is quite good but he turns to psychotic abuse for
no reason. Or maybe his reason is the gratification of getting a shocked
reaction. Whatever. He is a troll and is not worth your trouble.

PH

Yeah, good advice.

 

[atec77]

Yeah OK, but what's with the piss off bit?
Is there some unwritten rule about posting to this NG that I've missed
somewhere?

It's just the resident autistics way of saying hello , he is a bit queer
(wink wink) so best if you're thin skinned to push it over in the wanker
file to be ignored.

 

[atec77]

"Peter Howard"


** Piss off - you know nothing IDIOT.





...... Phil

Pot
Kettle
black
Queer

 

[Peter]

It's just the resident autistics way of saying hello , he is a bit queer
(wink wink) so best if you're thin skinned to push it over in the wanker
file to be ignored.

Yeah - done that...no more nonsense from that quarter. What a sad,pathetic
individual.

 

[Mark Harriss]

Yeah - done that...no more nonsense from that quarter. What a sad,pathetic
individual.

You weren't to know that Phil's good buddy who DID complete Uni
went on to design SCR's for GEC or someone like that in the States.
This is a sore point for "I could have been a genius" Phil.

 

[Phil Allison]

"Peter"


** Bloody TROLLs like Peter always squeal like stuck pigs when they are
OUTED !





........ Phil