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Square wave pulse (0-2.5kV)&(0.2-100msec)

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But i need a "square wave" which implies turning off the pulse at some point.  Once triggered an SCR stays on until
the current drops below its holding current, usually about 10mA, so my 2 to 25A pulse would continue for many time constants,
gradually dying away to nothing. As for the IGBT's they are too expensive.

Please advice

If IGBTs are too expensive, it sounds like the only choice you have will be to make a suitable mechanical relay switch yourself. There really is no way to get the kind of precision you want without paying for it.


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