2N5551HR Datasheet Rad-Hard 160 V, 0.5 A NPN bipol.
STMicroelectronics
2N5551HR - Hi-Rel NPN bipolar transistor
2N5551HR Datasheet Rad-Hard 160 V, 0.5 A NPN bipolar transistor 3 1 2 LCC-3 3 4 1 2 UB Pin 4 in UB is connected to the metallic lid. C (3) (2) B .
