ABB OS30FAJ12 Fuse

ABB OS30FAJ12 is a 3-pole, 30-amp fusible disconnect switch designed for motor-control and power-distribution panels, rated for up to 600 VAC and compatible with UL Class J fuses. This device is UL 98 listed and supports base mounting or DIN-rail mounting, offering flexible installation in control cabinets and industrial enclosures. In ABB’s specification data, it accommodates motor loads up to about 7.5 HP at 208–240 V, 15 HP at 480 V, and 20 HP at 600 V, with the corresponding current values reflecting those voltages and illustrating its suitability for mid-size motors. A notable safety feature is interlocking fuse covers that prevent access to the fuse elements while the switch is ON, reducing the risk of arc flash or electric shock during maintenance. Typical applications include isolating and protecting motors, pumps, compressors, and other control equipment in industrial automation, process lines, and equipment cabinets where a fused disconnect is required in accordance with UL 98 and Class J fuse protection.