Best protection for transistor

Discussion in 'General Electronics Chat' started by Fred_S, Dec 7, 2008.

  1. Fred_S

    Thread Starter New Member

    Nov 7, 2006
    I'm using a transistor (LM395) as a low level switch in a high voltage
    triggering application. I used the 395 as it's got 40V base protection
    and I have bi-polar transient voltage suppressors rated for much less
    than that also on the base as well as current limiting resistors.

    My question, what kind of protection if any is needed on the emitter
    collector.. I don't want to slow the transistor down as this needs to
    be a very fast switch..

    Any thoughts or suggestions
  2. mik3

    Senior Member

    Feb 4, 2008
    A schematic would be helpful.;)