View buz11a datasheet:

BUZ11A N - CHANNEL ENHANCEMENT MODE POWER MOS TRANSISTORS TYPE V R I DSS DS(on) D BUZ11A 50 V < 0.055 ? 27 A TYPICAL RDS(on) = 0.048 ? AVALANCHE RUGGED TECHNOLOGY 100% AVALANCHE TESTED REPETITIVE AVALANCHE DATA AT 100oC LOW GATE CHARGE 3 HIGH CURRENT CAPABILITY 2 1 175oC OPERATING TEMPERATURE APPLICATIONS TO-220 HIGH CURRENT, HIGH SPEED SWITCHING SOLENOID AND RELAY DRIVERS REGULATORS DC-DC & DC-AC CONVERTERS MOTOR CONTROL, AUDIO AMPLIFIERS AUTOMOTIVE ENVIRONMENT (INJECTION, INTERNAL SCHEMATIC DIAGRAM ABS, AIR-BAG, LAMPDRIVERS, Etc.) ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VDS Drain-source Voltage (VGS = 0) 50 V V Drain- gate Voltage (R = 20 k?)50 V DG R GS VGS Gate-source Voltage ± 20 V o ID Drain Current (continuous) at Tc = 25 C27