I want to use the POINTS of an early (6v) Automobile to switch a SEMICONDUCTOR controling the ignition coil . What would be a good useable device its probably been done before I have seen 12v systems but not 6v applications. Any device numbers would be helpful.
IGBT! Do a search and look through those, I guarentee that those will work in your application, since they are used by several of the biggest auto makers in the US.
The IGBT's that we use are logic level gate drive. I will have to do some searching to find the part numbers, but try looking at On semiconductors or Harris semiconductors.
There are plenty of "sensitive gate" IGBTs in the world. I use then when the job calls for them, but they are usually 25 to 50% more expensive in small volumes.