This part is a kind of semiconductor called SP8K3.

Function of this product has Transistor.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

SP8K3 Transistors Switching (30V, 7.0A) SP8K3 zFeatures 1) Low on-resistance. 2) Built-in G-S Protection Diode. 3) Small and Surface Mount Package (SOP8). zApplication Power switching, DC / DC converter. zExternal dimensions (Unit : mm) SOP8 5.0±0.2 (5) (8) 6.0±0.3 3.9±0.15 zStructure Silicon N-channel MOS FET 1.5±0.1 0.15 1.27 0.4±0.1 0.1 Each lead has same dimensions zAbsolute maximum ratings (Ta=25°C) It is the same ratings for the Tr. 1 and Tr. 2. www.DataSheet.co.kr zEquivalent circuit (8) (7) (6) (5) (8) (7) (6) (5) Parameter Drain-source voltage Gate-source voltage Drain current Source current (Body diode) Total power dissipation Channel temperature Storage temperature ∗1 Pw 10µs, Duty cycle 1% ∗2 MOUNTED ON A CERAMIC BOARD. Continuous Pulsed Continuous Pulsed [ ... ]

SP8K3 PDF Datasheet Download