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> Powerex KS621K40 1000V 400A darlington transistor
Powerex KS621K40 1000V 400A darlington transistor
These items are High Voltage, High Current, Triple Darlinton Bipolar Power Transistors, manufactured by Powerex (the USA Sales Agency for Mitsubishi Electric Co. power products and designs).
They are Powerex model KS621K40A41: 1000 Volt 400 Amp Triple Darlington Transistor Power module (with an internal circuit protection diode for the transistor).
Here is a link for the Powerex data sheet (that includes a photo and pin out drawings).
Here is some comparative price information:
These same exact Darlington power transistors are now selling new at galco.com for $544.73 each (that is: for three times the price). Here is the URL (for copy/paste) so that you can see for yourself: http:// /scripts/cgiip.exe/WA/wcat/itemdtl.r?listtype=Catalog&pnum=KS621K40-E-PRX
They are used, having been carefully removed from working HIGH QUALITY industrial equipment (that was declared surplus). They have been tested and found to be good.
