handbook, halfpage DESCRIPTION NPN medium power transistor in a SOT89 plastic package. PNP complements: BSR30; BSR3 and BSR33. MARKING TYPE NUMBER BSR40 BSR41 MARKING CODE AR1 AR2 TYPE NUMBER BSR42 BSR43 MARKING CODE AR3 AR4 1 Bottom view 2 3 MAM296 2 3 1 Fig.1 Simplified outline (SOT89) and sym.