This part is a kind of semiconductor called 2SK1588.

Function of this product has MOS Field Effect Transistor.

Manufacturers : Kexin

Image and pinout :

Some of the text within the PDF file :

SMD Type MOS Field Effect Transistor 2SK1588 Features Directly driven by Ics having a 3V power supply. Has low on-state resistance RDS(on)=0.5 MAX.@VGS=2.5V,ID=1.0A RDS(on)=0.3 MAX.@VGS=4.0V,ID=1.5A SOT-89 4.50+0.1 -0.1 1.80+0.1 -0.1 12 3 0.48+0.1 -0.1 0.53+0.1 -0.1 +0.12.50 -0.1 +0.14.00 -0.1 MOSFET Unit: mm 1.50+0.1 -0.1 0.44+0.1 -0.1 +0.10.80 -0.1 +0.12.60 -0.1 Absolute Maximum Ratings Ta = 25 Parameter Drain to source voltage Gate to source voltage Drain current (DC) Drain current(pulse) * Power dissipation Channel temperature Storage temperature * PW 10ms, duty cycle 5% Symbol VDSS VGSS ID ID PD Tch Tstg Rating 16 16 3.0 6.0 2.0 150 -55 to +150 Electrical Characteristics Ta = 25 Parameter Drain cut-off current Gate leakage current Gate to source cutoff voltage Forward tra [ ... ]

2SK1588 PDF Datasheet Download