This part is a kind of semiconductor called E3055T.

Function of this product has MJE3055T.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

MJE3055T/MJE2955T GENERAL DESCRIPTION Complementary, high power transistors in a plastic envelope, primarily for use in audio and general purpose SILICON EPITAXIAL PLANAR TRANSISTOR QUICK REFERENCE DATA SYMBOL TO-220 CONDITIONS VBE = 0V MIN MAX 70 60 10 75 1.2 2.0 UNIT V V A A W V V s VCBO VCEO IC ICM Ptot VCEsat VF tf PARAMETER Collector-emitter voltage peak value Collector-emitter voltage (open base) Collector current (DC) Collector current peak value Total power dissipation Collector-emitter saturation voltage Diode forward voltage Fall time Tmb 25 IC = 4.0A; IB = 0.4A IF = 4.0A 1.5 LIMITING VALUES SYMBOL VCESM VCEO VEBO IC IB Ptot Tstg Tj PARAMETER Collector-emitter voltage peak value Collector-emitter voltage (open base) Emitter-base oltage (open colloct [ ... ]

E3055T PDF Datasheet Download