ABB OS800L03 Switch

ABB OS800L03 is a 3‑pole fusible disconnect switch (front‑operated) designed to isolate heavy‑load circuits in industrial electrical systems. The left‑side variant (03) supports an 800 A continuous current rating and is supplied without the handle or shaft, allowing you to select the compatible operator separately. This ABB device uses Class L fuse assemblies and is rated for service up to 600 VAC, making it suitable for protecting motors and other high‑power equipment. In typical installations, it offers horsepower ratings of 250 hp at 240 VAC, 500 hp at 480 VAC, and 500 hp at 600 VAC, enabling efficient disconnects across a range of voltages. As part of ABB’s line of fusible disconnect switches, the OS800L03 combines reliable mechanical operation with integrated electrical protection to provide safe isolation and maintenance access. The configuration is three‑pole, facilitating three‑phase circuits, and the design emphasizes front operation for straightforward actuation in control panels and switchgear setups.