C4557 Overview
.. 2SC4557 Application : Switching Regulator and General Purpose (Ta=25°C) 2SC4557 100max 100max 550min 10 to 28 0.5max 1.2max 6typ 105typ V V 16.2 Silicon NPN Triple Diffused Planar Transistor (High Voltage Switchihg Transistor) sAbsolute maximum ratings.