2n2221.pdf datasheet:

2N2221Dimensions in mm (inches). Bipolar NPN Device in a 5.84 (0.230)5.31 (0.209) Hermetically sealed TO18 4.95 (0.195)4.52 (0.178)Metal Package. Bipolar NPN Device. VCEO = 30V 0.48 (0.019)0.41 (0.016)dia.IC = 0.8A 2.54 (0.100)All Semelab hermetically sealed products Nom. can be processed in accordance with the requirements of BS, CECC and JAN, JANTX, JANTXV and JANS specifications 3 12TO18 (TO206AA) PINOUTS 1 Emitter 2 Base 3 Collector Parameter Test Conditions Min. Typ. Max. UnitsVCEO* 30 VIC(CONT) 0.8 AhFE @ 10/0.15 (VCE / IC) 40 120 -ft 250M HzPD 0.5 W* Maximum Working Voltage This is a shortform datasheet. For a full datasheet please contact sales@semelab.co.uk.Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Sem