This part is a kind of semiconductor called ME9435.

Function of this product has 30V P-Channel Enhancement Mode MOSFET.

Manufacturers : Matsuki

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Some of the text within the PDF file :

ME9435 30V P-Channel Enhancement Mode MOSFET GENERAL DESCRIPTION The ME9435 is the P-Channel logic enhancement mode power field effect transistors, using high cell density, DMOS trench technology. This high density process is especially tailored to minimize on-state resistance. These devices are particularly suited for low voltage application such as cellular phone, notebook computer power management and other battery powered circuits, and in-lin power loss that are needed in a very small outline surface mount package. FEATURES @VGS=-10V 2. -30V/-4.2A, RDS(ON)=100m @VGS=-4.5V 1. -30V/-5.3A, RDS(ON)=60m PIN CONFIGURATION (SOP-8) Top View Absolute Maximum Ratings (TA=25 Parameter Drain-Source Voltage Gate-Source Voltage Continuous Drain Current Pulsed Drain Current 1) Maximum Power Dissi [ ... ]

ME9435 PDF Datasheet Download