The inside of the ZapStop is an MR2535L avalance diode. Cost about $1.40 in
quantity 10 at Digikey. It will take a 600 amp hit. Wired backwards across
the alternator output it will break down under the high voltage as the field
collapses and short it more or less harmlessly.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com