This part is a kind of semiconductor called K2981.

Function of this product has 2SK2981.

Manufacturers : NEC

Image and pinout :

Some of the text within the PDF file :

DATA SHEET MOS FIELD EFFECT TRANSISTOR 2SK2981 SWITCHING N-CHANNEL POWER MOS FET INDUSTRIAL USE DESCRIPTION This product is N-Channel MOS Field Effect Transistor designed for high current switching applications. FEATURES • Low on-resistance RDS(on)1 = 27 mΩ (MAX.) (VGS = 10 V, ID = 10 A) RDS(on)2 = 40 mΩ (MAX.) (VGS = 4.5 V, ID = 10 A) RDS(on)3 = 50 mΩ (MAX.) (VGS = 4 V, ID = 10 A) • Low Ciss : Ciss = 860 pF (TYP.) • Built-in gate protection diode ORDERING INFORMATION PART NUMBER PACKAGE 2SK2981 TO-251 2SK2981-Z TO-252 PACKAGE DRAWING (Unit : mm) 7.0 MIN. 5.5 ±0.2 13.7 MIN. 1.6 ±0.2 6.5 ±0.2 5.0 ±0.2 4 1 23 1.3 MAX. 1.5 +0.2 –0.1 2.3 ±0.2 0.5 ±0.1 0.6 ±0.1 2.3 2.3 0.6 ±0.1 0.75 1. Gate 2. Drain 3. Source 4. Fin (Drain) TO-251(MP-3) +0.2 –0.1 6 [ ... ]

K2981 PDF Datasheet Download