This part is a kind of semiconductor called K3306.

Function of this product has 2SK3306.

Manufacturers : NEC

Image and pinout :

Some of the text within the PDF file :

DATA SHEET MOS FIELD EFFECT TRANSISTOR 2SK3306 SWITCHING N-CHANNEL POWER MOS FET INDUSTRIAL USE ORDERING INFORMATION PART NUMBER 2SK3306 PACKAGE Isolated TO-220 (MP-45F) DESCRIPTION The 2SK3306 is N-Channel DMOS FET device that features a low gate charge and excellent switching characteristics, and designed for high voltage applications such as switching power supply, AC adapter. FEATURES • Low gate charge : 5 QG = 13 nC TYP. (VDD = 400 V, VGS = 10 V, ID = 5.0 A) • Gate voltage rating : ±30 V • Low on-state resistance : RDS(on) = 1.5 Ω MAX. (VGS = 10 V, ID = 2.5 A) • Avalanche capability ratings • Isolated TO-220(MP-45F) package (Isolated TO-220) ABSOLUTE MAXIMUM RATINGS (TA = 25°C) Drain to Source Voltage (VGS = 0 V) Gate to Source Voltage (VDS = 0 [ ... ]

K3306 PDF Datasheet Download