Fusible disconnect switch for use with 26-50 amp magnets. Standard knife switches are not capable of blocking the highly inductive magnet energy. Ohio's magnet disconnect switch interrupts the magnet circuit arc by using a quick break switch with a permanently connected power diode across the negative and positive of the switch output. The power diode directs the discharge current from negative to positive while blocking the normal current from positive to negative. The switch is polarity sensitive. NEMA 3R/12 enclosure. Note that fuses are not included.