This part is a kind of semiconductor called 2N3054A.

Function of this product has (2N3054/A) Silicon NPN Power Transistors.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

Inchange Semiconductor Product Specification Silicon NPN Power Transistors 2N3054 2N3054A DESCRIPTION ¡¤With TO-66 package APPLICATIONS ¡¤Designed for general purpose switching and amplifier applications PINNING (See Fig.2) PIN 1 2 3 Base Emitter Fig.1 simplified outline (TO-66) and symbol Collector DESCRIPTION Absolute maximum ratings(Ta=25¡æ ) SYMBOL VCBO VCEO VEBO IC IB PD Tj Tstg PARAMETER Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current 2N3054 Power dissipation 2N3054A Junction temperature Storage temperature TC=25¡æ 75 200 -65~200 ¡æ ¡æ Open emitter www.DataSheet.net/ CONDITIONS VALUE 90 55 7 4 2 25 UNIT V V V A A W Open base Open collector THERMAL CHARACTERISTICS SYMBOL PARAMETER 2N3054 Rth j-C Thermal resista [ ... ]

2N3054A PDF Datasheet Download