This part is a kind of semiconductor called BUZ11.

Function of this product has N - CHANNEL 50V - 0.03W - 33A TO-220 STripFET] MOSFET.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

® BUZ11 N - CHANNEL 50V - 0.03Ω - 33A TO-220 STripFET™ MOSFET T YPE BUZ 11 s s s s s V DSS 50 V R DS(o n) < 0.04 Ω ID 33 A TYPICAL RDS(on) = 0.03 Ω AVALANCHE RUGGED TECHNOLOGY 100% AVALANCHE TESTED HIGH CURRENT CAPABILITY 175oC OPERATING TEMPERATURE 3 1 2 APPLICATIONS HIGH CURRENT, HIGH SPEED SWITCHING s SOLENOID AND RELAY DRIVERS s REGULATORS s DC-DC & DC-AC CONVERTERS s MOTOR CONTROL, AUDIO AMPLIFIERS s AUTOMOTIVE ENVIRONMENT (INJECTION, ABS, AIR-BAG, LAMPDRIVERS, Etc.) s TO-220 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol V DS V DGR V GS ID IDM P tot Ts tg Tj Parameter Drain-source Voltage (VGS = 0) Drain- gate Voltage (R GS = 20 k Ω ) G ate-source Voltage Drain Current (continuous) at Tc = 25 C Drain Current (pulsed) T otal Dissipation at Tc = 25 C St [ ... ]

BUZ11 PDF Datasheet Download