This part is a kind of semiconductor called 9926B.

Function of this product has Dual N-Channel MOSFET.

Manufacturers : Tuofeng Semiconductor

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Some of the text within the PDF file :

Shenzhen Tuofeng Semiconductor Technology Co., Ltd SMD Type MOSFET Dual N-Channel MOSFET 9926B Features 6.5A, 20 V. rDS(on) = 0.022 @ VGS = 4.5 V 5.5A, 20 V rDS(on) = 0.035 @ VGS = 2.5 V. Absolute Maximum Ratings Ta = 25 Parameter Drain-Source Voltage Gate-Source Voltage Continuous Drain Current Ta=25 Pulsed Drain Current Maximum Power Dissipation TA = 25 TA = 70 Symbol VDS VGS ID IDM PD 10 secs Steady Sate 20 10 6.5 30 2.0 1.25 1.3 0.8 Unit V V A A W Thermal Resistance Ratings Parameter Maximum Junction-to-Ambient* Maximum Junction-to-Foot (Drain) t 10 sec Steady State Steady State * Surface Mounted on 1" X 1"FR4 Board. Symbol RthJA RthJF Typ 50 80 30 Max Unit 62.5 100 /W 40 Shenzhen Tuofeng Semiconductor Technology Co., Ltd SMD Type MOSFET 9926B Electrical Char [ ... ]

9926B PDF Datasheet Download