2N5571 thru 2N5574 (SILICON) 2N6145 thru 2N6147 MA.
ETC
MAC40798 - SILICON BIDIRECTIONAL THYRISTORS
2N5571 thru 2N5574 (SILICON) 2N6145 thru 2N6147 MAC40797, MAC40798· MT20~MTI SILICON BIDIRECTIONAL THYRISTORS · .. designed primarily for industria.