ROUND, SEMICONDUCTOR TYPE; 3.19 INCH; UL APPROVAL; 500 VAC, 450 VDC VOLTAGE RATING; 0.81 INCH DIAMETER; 100 KILOAMPERE (AC), 79 KILOAMPERE (DC) INTERRUPTING RATING; 40 AMPERE CURRENT RATING; BLADES, BOLT-IN TERMINAL TYPE; VERY FAST ACTING CHARACTERISTICS