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

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ellendort:
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

Afroman:
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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