PNP high-voltage transistor in a SOT323 plastic package. NPN complements: PMST5550 and PMST5551. handbook, halfpage PMST5401 PINNING PIN 1 2 3 base emitter collector DESCRIPTION 3 3 1 MARKING TYPE NUMBER PMST5401 Note 1. ∗ = - : Made in Hong Kong. ∗ = t : Made in Malaysia. MARKING CODE(1) 1 Top .