Go vertical, make the vertical board part of the main board panel. Assemble the board as usual and v-score when you assemble it.
Cheers
Zener diodes in TO220 or similar?
Aug 05, 2009
80 Replies
a clamped fet like: VNP5N07 ?
not sure how well a normal fet would work in avalance
-Lasse
More descriptively called 'roach wires' where I come from. IBM used to call them 'yellow wires' back when you could use wire to run signals in computers.
Cheers
Phil Hobbs
"Joerg" kirjoitti viestissä: snipped-for-privacy@mid.individual.net...
DO4 ? (ok, that one is not modern)
Borderline but... using a low voltage avalanche rated mosfet?
Thanks,
Fred.
Yes, that is the way to do it. But I'll probably leave the zener from drain to gate on the outside so we aren't restricted to specialty parts.
I'd never trust avalanche unless it was fully spec'd in the datasheet ;-)
Regards, Joerg
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Sure; just put a power NPN with low-wattage zener from collector to base (base/emitter pulldown resistor optional). The good news: Miller effect is on your side, for once!
That's what Lasse also mentioned but I'd rather not ...
Regards, Joerg
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There is a metal structure.
Wave-side? I'd have to pipe the heat into some metal, some beefy metal.
Regards, Joerg
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No vertical space at all, beyond the typical height of the parts :-(
Regards, Joerg
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Well, so far I only found DO-5 for power zeners. Which is very wide because they designed those for wrench-fastening.
Regards, Joerg
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That would be back when computers were wired using punch-down blocks and wire-wrap ?:-)
...Jim Thompson
| James E.Thompson, P.E. | mens |
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I love to cook with wine Sometimes I even put it in the food
style,
said
yeh I guess 70V could be special, lots of automotive parts with 42V clamp
-Lasse
Phenolic terminal strips and 12AT7s. ;)
Cheers
Phil Hobbs
And a big Weller "gun"... such nice smells ;-)
...Jim Thompson
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine Sometimes I even put it in the food
It would be nice if they made similar ones for 24V truck systems. But probably not much of a market because in many regions such as the US trucks also run on 12V. Even really big rigs.
Regards, Joerg
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And, with a little care, a zener in one of those little rectangular packages could be soldered right across the leads! :-)
Cheers! Rich
Yes, but they also don't come in TO-220 style packages so I can get the accumulating energy off my back.
Regards, Joerg
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It could but in this app that would likely be shot down as a non-approvable kludge ;-)
Regards, Joerg
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NTE makes DO4 NTE5174A thru NTE5232A. Expensive
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