2n4928csm.pdf datasheet:

2N4928CSMGENERAL PURPOSE TRANSISTOR IN AHERMETICALLY SEALEDCERAMIC SURFACE MOUNT PACKAGEMECHANICAL DATAFOR HIGH RELIABILITY APPLICATIONSDimensions in mm (inches)0.51 0.10FEATURES(0.02 0.004) 0.31rad.(0.012) SILICON PNP TRANSISTOR3 HERMETIC CERAMIC SURFACE MOUNTPACKAGE (SOT23 COMPATIBLE) CECC SCREENING OPTIONS21 SPACE QUALITY LEVELS OPTIONS1.91 0.10 JAN LEVEL SCREENING OPTIONS(0.075 0.004)A0.31rad.(0.012)3.05 0.13(0.12 0.005)1.40(0.055)1.02 0.10max.A =(0.04 0.004)LCC1 PACKAGEAPPLICATIONS:Hermetically sealed surface mount versionUnderside Viewof the 2N4928 for high reliability / spacePAD 1 Base PAD 2 Emitter PAD 3 Collector applications requiring small size and lowweight devices.ABSOLUTE MAXIMUM RATINGS (Tcase = 25C unless otherwise stated)VCBO Collec