This part is a kind of semiconductor called BL3401.

Function of this product has P-Channel High Density Trench MOSDET.

Manufacturers : GME

Image and pinout :

Some of the text within the PDF file :

P-Channel High Density Trench MOSDET FEATURES z Super high dense cell trench design for low RDS(ON). z Rugged and Reliable. Pb Lead-free APPLICATIONS z P-channel enhancement mode effect transistor. z Switching application. Production specification BL3401 ORDERING INFORMATION Type No. Marking BL3401 A19TF SOT-23 Package Code SOT-23 MAXIMUM RATING @ Ta=25℃ unless otherwise specified Symbol Parameter VDSS Drain-Source voltage VGSS ID IDM IS Gate -Source voltage Drain Current-Continuous a -Pulseb @ TA = 25 ℃ Drain-Source Diode Forward Current a PD Power Dissipation RθJA Thermal resistance,Junction-to-Ambient TJ, Tstg Junction and Storage Temperature Value -25 ±12 -4.2 -16 -2.2 1.25 75 -55 to +150 Units V V A A W ℃/W ℃ C194 Rev.A www.gmicroelec.com 1 Produ [ ... ]

BL3401 PDF Datasheet Download