BTW66 pdf datasheet search result.

Part NoManufacturerApplication
BTW66STMicroelectronicsSCR(????????
BTW66-1000THYRISTOR MODULE|SCR|20A I(T)
BTW66-1200THYRISTOR MODULE|SCR|20A I(T)
BTW66-200THYRISTOR MODULE|SCR|20A I(T)
BTW66-400THYRISTOR MODULE|SCR|20A I(T)
BTW66-600THYRISTOR MODULE|SCR|20A I(T)
BTW66-800THYRISTOR MODULE|SCR|20A I(T)