NPN power transistor in a TO-126; SOT32 plastic package. PNP complement: BD330. handbook, halfpage BD329 PINNING PIN 1 2 3 emitter collector, connected to metal part of mounting surface base DESCRIPTION 2 3 1 1 2 3 Top view MAM254 Fig.1 Simplified outline (TO-126; SOT32) and symbol. QUICK .