ABB OT100F3 - 100A, 3-Pole, Disconnect Switch

The ABB OT100F3 is a rugged 100A, 3-pole disconnect switch purpose-built for reliable on/off isolation and precise overcurrent protection in challenging industrial and commercial environments. Designed to simplify control of motors, feeders, and critical circuits, this fusible disconnect switch combines compact footprint with maintainable design for accessible servicing and safe operation.

• 3-Pole, 100A performance: Designed for three-phase systems, delivering solid switching and dependable protection for motors and branch circuits.
• Integrated fusible protection: The OT100F3 functions as a fusible disconnect, providing overcurrent protection in a single, streamlined unit to reduce wiring complexity and enclosure space.
• Compact, maintainable design: A space-efficient solution that’s easier to install and service, helping you optimize panel layouts without sacrificing safety or reliability.
• Reliable isolation for demanding environments: Built to withstand industrial and commercial use, helping you isolate circuits quickly and safely during maintenance or fault conditions.
• Versatile use cases: Ideal for motor disconnects, panelboards, and branch circuit protection where a compact, maintainable protection switch is required.

Who is this for? engineers, electricians, and procurement professionals looking for a dependable, space-conscious disconnect switch that also provides built-in overcurrent protection. It’s well-suited for control panels, machine rooms, and distributed electrical feeders where uptime and safety matter.

• Use case: motor control quickly isolate a motor during maintenance or fault conditions to protect both personnel and equipment.
• Use case: panelboard protection serve as a compact main or feeder disconnect within switchgear and distribution panels.
• Use case: branch circuit protection safeguard critical circuits in commercial or light-industrial applications with a single, integrated solution.

Key specifications at a glance

• Model: OT100F3
• Amperage: 100 A
• Poles: 3-Pole
• Type: Fusible disconnect switch for on/off isolation and overcurrent protection

Practical tips for installation and maintenance

• Plan for a three-phase layout to align with the 3-pole design and ensure proper balance across phases.
• Verify fuse ratings are compatible with your load and follow applicable electrical codes for fuse selection and enclosure placement.
• Schedule periodic inspections of the switch contacts and fuse assemblies to maintain reliable operation and quick fault isolation.

The ABB OT100F3 stands out by delivering a compact, maintenance-friendly solution that fuses isolation and protection into a single, dependable device. With its robust construction and targeted design for motor disconnects, panelboards, and branch circuits, it simplifies installation, reduces cabling, and supports safer, faster maintenance — a practical choice for facilities where space, reliability, and quick fault response matter most.