This part is a kind of semiconductor called 2N3053.

Function of this product has MEDIUM POWER SILICON NPN PLANAR TRANSISTOR.

Manufacturers : Seme LAB

Image and pinout :

Some of the text within the PDF file :

2N3053 MECHANICAL DATA Dimensions in mm (inches) 8.89 (0.35) 9.40 (0.37) 7.75 (0.305) 8.51 (0.335) MEDIUM POWER SILICON NPN PLANAR TRANSISTOR 4.19 (0.165) 4.95 (0.195) FEATURES 12.70 (0.500) min. 0.89 max. (0.035) 7.75 (0.305) 8.51 (0.335) dia. • VCEO = 40V 5.08 (0.200) typ. • IC • Ptot 2.54 (0.100) = 0.7A = 5W 2 1 0.66 (0.026) 1.14 (0.045) 0.71 (0.028) 0.86 (0.034) 3 45˚ TO39 PACKAGE Underside View Pin 1 = Emitter Pin 2 = Base Pin 3 = Collector ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated) VCBO VCEO VCER VCEX VEBO IC PTOT Tj Tstg Rth(jc) Rth(ja) Semelab plc. Collector – Base Voltage Collector – Emitter Voltage Collector – Emitter Sustaining Voltage Collector - Emiiter Voltage Emitter-Base Voltage Collector Current Power Dissipation Tamb = 25°C [ ... ]

2N3053 PDF Datasheet Download