Catalog > Semiconductors > Discrete Semiconductors > Transistors Bipolar Junction Transistor Bipolar Junction Transistor 2SD1554 N+Di 1500V 3,5A 40W TO3PH(I)S Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Additional Information Polarity NPN Material Silicon Power Dissipation 40A