This part is a kind of semiconductor called 2N3771.

Function of this product has HIGH POWER NPN SILICON TRANSISTOR.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

2N3771 ® 2N3772 HIGH POWER NPN SILICON TRANSISTOR s STMicroelectronics PREFERRED SALESTYPES DESCRIPTION The 2N3771, 2N3772 are silicon epitaxial-base NPN transistors mounted in Jedec Jedec TO-3 metal case. They are intended for linear amplifiers and inductive switching applications. 1 2 TO-3 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter VCEO VCEV VCBO VEBO IC ICM IB IBM Ptot Tstg Collector-Emitter Voltage (IE = 0) Collector-Emitter Voltage (VBE = -1.5V) Collector-Base Voltage (IB = 0) Emitter-Base Voltage (IC = 0) Collector Current Collector Peak Current Base Current Base Peak Current Total Dissipation at Tc ≤ 25 oC Storage Temperature December 2000 Value 2N3771 2N3772 40 60 50 80 50 100 57 30 20 30 30 7.5 5 15 15 150 -65 to 200 Unit V V V [ ... ]

2N3771 PDF Datasheet Download