ABB OT30F3 Disconnect Switch Brand: ABB. Part Number: OT30F3. ABB Disconnect Switch, Front Operated Non-Fusible Open, Series: OT Series, 600 VAC, 30 A, 30 hp, 50 Hz, 3 Poles, 200 kA Short Circuit, IP20, Surface Mount, Screw Terminal, 40 deg C, 70 mm H x 100 mm W x 74 mm D. Additional Description: ABB -OT30F3 (O) 3P 30A UL98 NF SW. Catalog Description: 3-pole, front operated, base mounted, DIN-rail mountable switch-diconnector / non-fusible diconnect switch with front protected clamp terminals, handle and shaft are not included..