high voltage resistors

[zappedagain]

Looking at thread240-431670, I noticed the through hole resistors and was intrigued.

While this is probably an old design, I just checked and Panasonic only rates their 2512 SMD packages to 200V continuous, 500V peak (per ERJ2GE0R00X.pdf). Do we EEs still need to use through hole parts for higher voltages? I think the last time I worked on high voltage was before 0805 resistors were popular...

Z

 

[Comcokid]

For higher voltages with SMT I just use several 1206 resistors in series.

 

[IRstuff]

There are other things that need to be done with high-voltage PCB design, e.g., not running traces to the edge of the board; we had lots of excitement when that rule was violated.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

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[itsmoked]

Good points. I also use the multiple 1206s in a row. Doing it for those wacko clocks I'm building. You also want the boards 'clean'.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[MacGyverS2000]

High-voltage arcing between leads of a surface mount resistor is a real danger, too... sometimes having the separation provided by a TH component is useful.

Dan - Owner

http://www.Hi-TecDesigns.com

 

[zappedagain]

Panasonic, TE, and Vishay offer resistors in the 200-500V range. The disclaimers do start to get interesting at the high voltages...

Z

 

[ScottyUK]

My old employer still make thick film resistors in the kV range.

http://www.ttelectronics.com/resistors/high-voltage-resistors

 

[zappedagain]

Thanks, Scotty. I also see Stackpole's UHV series goes up to 20K in SMD. They are out there!

Z

 

[itsmoked]

Reason I refuse to ever use Carlos Gavazzi crap ever again. They brought down a $24M flat panel fab machine by using a single SMD 1206 "high voltage" capacitor across the mains on SSR monitors. Then they had the gall to blame it in others even though there was a crater in the middle of their product, centered on the ill equipped capacitor. Smoke-in-a-clean-room.

Keith Cress
kcress -

http://www.flaminsystems.com