2sa1579.pdf datasheet:

High-voltage Amplifier Transistor (120V, 50mA) 2SA1579 / 2SA1514K Features Dimensions (Units : mm) 1) High breakdown voltage. (BVCEO = 120V) 2SA15792) Complements the 2SC4102 / 2SC3906K Absolute maximum ratings (Ta=25C) 1.25Parameter Symbol Limits Unit2.1Collector-base voltage VCBO -120 VCollector-emitter voltage VCEO -120 V0.1Min.Emitter-base voltage VEBO -5 VEach lead has same dimensionsCollector current IC -50 mAROHM : UMT3 (1) EmitterCollector power dissipation PC 0.2 W EIAJ : SC-70 (2) BaseJEDEC : SOT-323 (3) CollectorJunction temperature Tj 150 CStorage temperature Tstg -55 to +150 C2SA1514K1.6Packaging specifications and hFE 2.8Type 2SA1579 2SA1514KPackage UMT3 SMT3hFE RS RS0.3Min.Each lead has same dimensionsMarking R RCode T106 T146 ROHM : SMT3 (1) EmitterEIAJ : SC-59 (2) BaseB