This part is a kind of semiconductor called 2SK3113B.

Function of this product has MOS FIELD EFFECT TRANSISTOR.

Manufacturers : NEC

Image and pinout :

Some of the text within the PDF file :

DATA SHEET MOS FIELD EFFECT TRANSISTOR 2SK3113B SWITCHING N-CHANNEL POWER MOS FET DESCRIPTION The 2SK3113B is N-channel MOS 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 on-state resistance RDS(on) = 4.4 Ω MAX. (VGS = 10 V, ID = 1.0 A) • Low gate charge QG = 7.9 nC TYP. (VDD = 450 V, VGS = 10 V, ID = 2.0 A) • Gate voltage rating : ±30 V • Avalanche capability ratings ORDERING INFORMATION PART NUMBER 2SK3113B-S15-AY Note Note Note Note LEAD PLATING PACKING Tube 70 p/tube PACKAGE TO-251 (MP-3-a) typ. 0.39 g TO-251 (MP-3-b) typ. 0.34 g TO-252 (MP-3ZK) typ. 0.27 g 2SK3113B(1)-S27-AY 2SK3113B-ZK-E1-AY 2SK3113B-ZK-E2 [ ... ]

2SK3113B PDF Datasheet Download