ABB OT400U12 - 400A, Switch

Meet the ABB OT400U12 400A switch—built to deliver dependable on/off isolation and reliable overcurrent protection in even the harshest industrial and commercial environments. This compact, maintainable fusible switch is designed to keep critical electrical systems running smoothly while simplifying maintenance and service when it matters most.

Why the OT400U12 stands out:

• 400A capacity provides robust protection for motor disconnects, panelboards, and branch circuits, helping prevent damage from short circuits and overloads.
• Compact, maintainable design enables easy integration into existing distribution layouts and simplifies routine service, reducing downtime during fuse replacements or inspections.
• On/off isolation ensures clear, safe disconnection of circuits for maintenance or emergency shutdowns, improving safety for personnel and equipment.
• Overcurrent protection tailored for demanding applications, delivering reliable response to electrical faults and helping protect downstream devices.
• Rugged, industrial-grade construction backed by ABB’s engineering heritage, designed to withstand challenging environments typical of manufacturing floors, power rooms, and commercial facilities.

Ideal use cases

• Motor disconnects in machine rooms, conveyors, and processing lines where a dedicated, easily serviceable switch is required.
• Panelboards needing a compact fusible switch to consolidate protection and isolation in a single unit.
• Branch circuit protection in load centers and distribution panels where rapid fault isolation minimizes downtime.

What you gain with the OT400U12

With the OT400U12, you’re choosing a solution that combines precise protection with practical maintenance advantages. The unit supports straightforward fuse replacement and inspection, helping uptime stay high and service tasks stay efficient. Its 400A rating makes it suitable for mid-to-large electrical feeds without demanding extra space or complex installation.

Technical snapshot

• Model: OT400U12
• Amperage: 400A
• Type: Fusible switch for on/off isolation and overcurrent protection
• Applications: Motor disconnects, panelboards, branch circuit protection
• Design emphasis: Compact, maintainable, robust for industrial/commercial use

For facilities aiming to streamline protection and isolation in a single, reliable package, the ABB OT400U12 delivers a clear, practical path to safer operation, easier maintenance, and consistent electrical performance across demanding workloads.