Designed for use in output stage of 1W audio amplifier, voltage regulator, DC-DC converter and relay driver. Pinning 1 = Emitter 2 = Collector 3 = Base .163(4.12) .153(3.87) .044(1.12) .034(0.87) .060(1.52) .050(1.27) TO-126ML .146(3.70) .136(3.44) Absolute Maximum Ratings(TA=25oC) Characteristic.