This part is a kind of semiconductor called STP3020L.

Function of this product has N - CHANNEL POWER MOSFET.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

® STP3020L N - CHANNEL 30V - 0.019Ω - 40A - TO-220 STripFET™ POWER MOSFET TYPE ST P3020L s s s V DSS 30 V R DS(on) < 0.022 Ω ID 40 A TYPICAL RDS(on) = 0.019 Ω LOW GATE CHARGE A 100oC APPLICATION ORIENTED CHARACTERIZATION 3 1 2 DESCRIPTION This Power Mosfet is the latest development of STMicroelectronics unique ”Single Feature Size™” strip-based process. The resulting transistor shows extremely high packing density for low on-resistance, rugged avalance characteristics and less critical alignment steps therefore a remarkable manufacturing reproducibility. APPLICATIONS s HIGH CURRENT, HIGH SPEED SWITCHING SOLENOID AND RELAY DRIVERS s MOTOR CONTROL, AUDIO AMPLIFIERS s DC-AC & DC-AC CONVERTERS IN HIGH PERFORMANCE VRMs s AUTOMOTIVE ENVIRONMENT (INJECTION, ABS, AIR-BAG, LAM [ ... ]

STP3020L PDF Datasheet Download