NPN silicon planar epitaxial transistor encapsulated in a plastic SOT223 SMD package. 1 2 3 e MAM043 - 1 PINNING - SOT223 PIN 1 2 3 4 SYMBOL e b e c base emitter collector DESCRIPTION emitter Top view Fig.1 Simplified outline and symbol. QUICK REFERENCE DATA RF performance at Ts ≤ 60 °C in a co.