8306P2 silicon NPN transistor by Texas Instruments. Package: TO-5 can with long old plated leads, crimped sides for heatsink insertion. House codes#1 Top: SP2183 can stamped witha "D" (*) House codes#2 Side: 8306P2 can sides indented. Date codes : 6917 Awaiting info / datasheet Status: PNOS (Perfect New Old Stock) Tested components: YES RoHS compliant: no note (*) some cans have had the top markings burnished off, just leaving side markings.