DESCRIPTION NPN transistor in a SOT23 plastic package. MARKING TYPE NUMBER PMBT6428 PMBT6429 MARKING CODE(1) *1K *1L Note 1. * = p : Made in Hong Kong. * = t : Made in Malaysia. * = W : Made in China. handbook, halfpage 3 3 1 1 Top view 2 MAM255 2 Fig.1 Simplified ou.