This part is a kind of semiconductor called A2SHB.

Function of this product has N-Channel Enhancement mode Field Effect Transistor.

Manufacturers : SLS SEMICONDUCTOR

Image and pinout :

Some of the text within the PDF file :

SLS SEMICONDUCTOR (SHENZHEN) CO.,LTD. SOT-23 封装半导体场效应管/SOT-23 Plastic-Encapsulate MOSFETS SLS2302(N-Channel Enhancement mode Field Effect Transistor) 印章/MARKING: A2SHB 特点/Features： 1、 电流能力强； 2、 导通电阻低； 用途/Applications： 用于高速开关和 DC-DC 转换电路。 极限参数/Absolute maximum ratings(Ta=25℃) 参数/Parameter 漏极-源极电压/Drain-Source Voltage 栅极-源极电压/Gate-Source Voltage 漏极电流（持续）/Continuous Drain Current 耗散功率/Power Dissipation 热阻/ Thermal Resistance Junction to Ambient 结温/Junction Temperature 储存温度/Storage Temperature 符号/ Symbol VDS VGS ID PD RθJA Tj Tstg 数值/Value 20 ±8 2.1 0.35 350 150 -55～150 单位/Unit V V A W ℃/mW ℃ ℃ 电性 [ ... ]

A2SHB PDF Datasheet Download