Overview
The ABB OT100F3 is a heavy-duty, front-operated switch-disconnector designed for industrial control panels, motor control centers, and power distribution equipment. This 3-pole, non-fusible disconnect switch handles 100A at rated 600VAC and 750VAC maximum contact voltage, providing safe load isolation in UL and CSA-compliant installations.
Key Features
- Dead-front, finger-proof construction with terminal shrouds reduces shock hazard and improves installation safety
- Front-operated handle with door interlock—handle locks prevent panel access when switch is in ON position
- Modular design enables faster panel layout and commissioning compared to conventional disconnects
- Visible contact indication (100A+) confirms switch position at a glance
- High mechanical endurance—rated for up to 20,000 operating cycles
- Flexible mounting—both base and DIN-rail options; handles incoming power from top or bottom
- Padlock capability—handle accepts up to three padlocks for LOTO compliance
Technical Specifications
- Rated current: 100A (AC)
- Contact voltage: 600VAC rated / 750VAC maximum
- Poles: 3
- Short-circuit rating: 200 kA
- Motor HP rating: 50 hp at 600VAC
- Terminal style: Screw clamp (protected)
- IP rating: IP20
- Mounting: DIN rail or base mount
- Operating temperature: -40°C to +70°C
- Dimensions: 100 mm (H) × 70 mm (W) × 74 mm (D)
- Certifications: IEC 60947-3, UL, CSA
- Material: Track-resistant phenolic; welded contact protection
Typical Applications
The OT100F3 serves critical isolation functions in:
- Motor disconnects on control panels and switchgear
- Service entrance and panelboard disconnect duty
- Industrial control equipment requiring safe load shedding
- Motor control centers (MCC) feeder isolation
- Machinery and process equipment main disconnects
Compatibility & Replacements
The OT100F3 is part of ABB’s OT series of isolating switches and is fully interchangeable within the OT100 frame size family. The modular design allows accessory options including B25 auxiliary switches and extended terminal variants (top/bottom/both sides). For larger current requirements, ABB offers OT125 (125A) and higher frame sizes. Handle and shaft are sold separately; verify compatibility with your enclosure door thickness and control scheme before ordering.
