This part is a kind of semiconductor called P80NF55-08.
Function of this product has STP80NF55-08.
Manufacturers : STMicroelectronics
Image and pinout :

Some of the text within the PDF file :
N-CHANNEL 55V - 0.0065 Ω - 80A D2PAK/I2PAK/TO-220 STripFET™ II POWER MOSFET TYPE STB80NF55-08/-1 STP80NF55-08 s s STP80NF55-08 STB80NF55-08 STB80NF55-08-1 VDSS 55 V 55 V RDS(on) <0.008 Ω <0.008 Ω ID 80 A 80 A 3 1 TYPICAL RDS(on) = 0.0065Ω LOW THRESHOLD DRIVE 3 12 DESCRIPTION This Power MOSFET is the latest development of STMicroelectronis unique "Single Feature Size™" strip-based process. The resulting transistor shows extremely high packing density for low onresistance, rugged avalanche characteristics and less critical alignment steps therefore a remarkable manufacturing reproducibility. APPLICATIONS s SOLENOID AND RELAY DRIVERS s MOTOR CONTROL, AUDIO AMPLIFIERS s DC-DC CONVERTERS s AUTOMOTIVE ENVIRONMENT D2PAK TO-263 I2PAK TO-262 3 1 2 TO-220 [ ... ]
P80NF55-08 PDF Datasheet Download
