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RE: coil running of car battery(s)?

Original poster: "Derek Woodroffe" <tesla@xxxxxxxxxxxxxxx>

>Hi Derek,

>I was curious about the circuit so I checked it out. I was initially
concerned because it has no snubber >
>across the FET.  So I checked the data sheet out for the device. I was
impressed by its large safe operating
>area and 0.5J single pulse avalanche energy capability. Truly a transistor
that's hard to kill. (but not


If only I have killed many of them, usually from spikes in the gate, they
are very susceptible to HV..

Although the circuit is similar to the one I used, being 30+ I have actually
used the good old 2N3055, which is apparently much easier to kill, maybe its
my experience, but i've only killed a couple in that circuit, and most of
them are from shorts whilst playing, not "in service". I do have a 4nF cap
and a reverse diode across then though.