This part is a kind of semiconductor called 2N4239.

Function of this product has GENERAL PURPOSE TRANSISTOR.

Manufacturers : Motorola

Image and pinout :

Some of the text within the PDF file :

2N4237 2N4238 2N4239 CASE 079-02, STYLE 1 TO-39 (TO-205AD) GENERAL PURPOSE TRANSISTOR NPN SILICON MAXIMUM RATINGS Rating Collector-Emitter Voltage Collector-Base Voltage Emitter-Base Voltage Base Current Collector Current Continuous Total Device Dissipation @ TA = 25°C Derate above 25°C Total Device Dissipation @ TC = 25°C Derate above 25°C Operating and Storage Junction Temperature Range Symbol 2N4237 2N4238 2N4239 Unit VCEO vCBO v EBO 'B ic 40 50 60 80 6.0 500 1.0 3.0* 80 Vdc 100 Vdc Vdc Vdc Adc PD 1.0 Watt 5.3 mW/°C Pd TJ. Tstg 6.0 34 - 65 to + 200 Watts mW/°C °C THERMAL CHARACTERISTICS Characteristic "Thermal Resistance, Junction to Case Symbol R&jc ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted.) Characteristic OFF CHARACTERISTICS Symbol Collec [ ... ]

2N4239 PDF Datasheet Download