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2N2221AXMECHANICAL DATA HIGH SPEED SWITCHING BIPOLAR NPN Dimensions in mm (inches) TRANSISTOR IN A HERMETICALLY 5.84 (0.230)5.31 (0.209)SEALED TO-18 PACKAGE 4.95 (0.195)4.52 (0.178)FEATURES SILICON NPN TRANSISTOR METAL CASE (JEDEC TO-18) HIGH SPEED SWITCHING 0.48 (0.019)0.41 (0.016)dia.2.54 (0.100)Nom.APPLICATIONS: SUITABLE FOR HIGH SPEED SWITCHING 3 1APPLICATIONS 2TO-18 (TO-206AA) CASE PIN CONFIGURATION Pin 1 Emitter Pin 2 Base Pin 3 Collector ABSOLUTE MAXIMUM RATINGS (Tcase = 25C unless otherwise stated) VCBO Collector-Base Voltage (IE = 0V) 60V VCEO Collector-Emitter Voltage (IB = 0V) 40V VEBO Emitter Base Voltage (IC = 0V) 5V IC Collector Current 0.8APtot Total Dissipation @ Tamb = 25C 0.5W Ptot Total Dissipation @ Tcase = 25C 1.8W Tstg Storage Temperature -65 to 20