View y1-smd code mmss8050 datasheet:

MCC MMSS8050-L TM Micro Commercial Components 20736 Marilla Street Chatsworth Micro Commercial Components MMSS8050-H CA 91311 Phone: (818) 701-4933 Fax: (818) 701-4939 Features • SOT-23 Plastic-Encapsulate Transistors NPN Silicon • Capable of 0.625Watts(Tamb=25OC) of Power Dissipation. • Collector-current 1.5A Plastic-Encapsulate • Collector-base Voltage 40V • Operating and storage junction temperature range: -55OC to +150OC Transistor • Marking : Y1 • Case Material: Molded Plastic. UL Flammability Classification Rating 94V-0 and MSL Rating 1 SOT-23 A D O Electrical Characteristics @ 25 C Unless Otherwise Specified C Symbol Parameter Min Max Units B C OFF CHARACTERISTICS V(BR)CBO Collector-Base Breakdown Voltage 40 --- Vdc B E (I =100uA