This part is a kind of semiconductor called KTA1021.

Function of this product has EPITAXIAL PLANAR PNP TRANSISTOR.

Manufacturers : KEC

Image and pinout :

Some of the text within the PDF file :

SEMICONDUCTOR TECHNICAL DATA GENERAL PURPOSE APPLICATION. SWITCHING APPLICATION. FEATURES ᴌExcellent hFE Linearity. : hFE(2)=25(Min.) at VCE=-6V, IC=-400mA ᴌ1 Watt Amplifier Application. ᴌComplementary to KTC1020. MAXIMUM RATING (Ta=25ᴱ) CHARACTERISTIC SYMBOL Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current Base Current Collector Power Dissipation Junction Temperature VCBO VCEO VEBO IC IB PC Tj Storage Temperature Range Tstg RATING -35 -30 -5 -500 -100 400 150 -55ᴕ150 UNIT V V V mA mA mW ᴱ ᴱ J K D KTA1021 EPITAXIAL PLANAR PNP TRANSISTOR B F A HM C EE 1 2 3N L 1. EMITTER 2. COLLECTOR 3. BASE G O DIM MILLIMETERS A 3.20 MAX B 4.30 MAX C 0.55 MAX D 2.40+_ 0.15 E 1.27 F 2.30 G 14.00+_ 0.50 H 0.60 MAX J 1.05 K 1.45 L 25 M 0.80 [ ... ]

KTA1021 PDF Datasheet Download