View stb80nf55l datasheet:

STB80NF55L-06 STP80NF55L-06 N-CHANNEL 55V - 0.005 ? - 80A D?PAK/TO-220 STripFET™ II POWER MOSFET TYPE VDSS RDS(on) ID STB80NF55L-06 55 V < 0.0065 ? 80 A STP80NF55L-06 55 V < 0.0065 ? 80 A TYPICAL RDS(on) = 0.005 ? LOW THRESHOLD DRIVE LOGIC LEVEL DEVICE 3 SURFACE-MOUNTING D2PAK (TO-263) 1 3 2 POWER PACKAGE IN TUBE (NO SUFFIX) OR 1 D2PAK IN TAPE & REEL (SUFFIX “T4”) TO-220 TO-263 (Suffix “T4”) 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 on- INTERNAL SCHEMATIC DIAGRAM resistance, rugged avalanche characteristics and less critical alignment steps therefore a remark- able manufacturing reproducibility. APPL