Overview
The Eaton Cutler-Hammer FDB3100L is a Series C molded case circuit breaker designed for unit-mount applications in F-frame industrial enclosures, switchboards, and motor control centers. Rated 100A at 3-pole, 600VAC/250VDC, this breaker combines fixed thermal and fixed magnetic trip protection for precise short-circuit and overload detection. The non-interchangeable trip module provides consistent performance across long-time and instantaneous protection functions.
Key Features
- 100A continuous current rating at 40°C ambient temperature
- Non-interchangeable thermal-magnetic trip unit with long-time and instantaneous functions
- Line and load end terminals for independent unit mounting
- 14kAIC interrupting capacity at 480VAC; 18kAIC at 240VAC; 10kAIC at 250VDC
- Suitable for 50/60 Hz systems in North American applications
- F-frame size: 6.0″H × 4.13″W × 3.38″D
Technical Specifications
- Frame: F-Frame (Series C)
- Poles: 3 (three-phase)
- Voltage: 600VAC / 250VDC
- Amperage: 100A
- Frequency: 50/60 Hz
- Trip Type: Thermal-Magnetic (fixed)
- Interrupting Ratings: 18kA @ 240VAC, 14kA @ 480VAC, 10kA @ 250VDC
- Terminal Configuration: Line and Load lugs
- Operating Temperature: 40°C rated
- Dimensions: 6.0″H × 4.13″W × 3.38″D
- Weight: Approximately 8–10 lbs
Typical Applications
The FDB3100L is used for branch circuit protection in:
- Industrial panelboards and distribution centers
- Motor control centers (MCCs) and switchboards
- Commercial HVAC and machinery branch circuits
- Feeder protection in modular busway systems
- Power systems up to 600VAC across North America
Compatibility & Replacements
Compatible With
- Eaton Series C F-frame enclosures and switchboards
- General Electric GE F-frame unit-mount applications
- Westinghouse F-frame compatible systems
- Standard three-phase AC power distribution systems, 50/60 Hz
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering. Molded case breaker replacement requires identical frame size, pole count, and voltage rating.
Works With
- Standard industrial AC panelboards and busbars rated for 600VAC
- NEMA AB1-1993 compliant control systems
- UL, CSA, and IEC certified electrical distribution systems
