Overview
The Cutler Hammer FDB2050 is a Series C thermal-magnetic molded case circuit breaker designed for commercial and industrial electrical systems. Rated for 50 amperes at 40°C with 600 VAC at 50/60 Hz and 250 VDC ratings, this breaker provides dependable protection against short circuits and overloads in single-phase applications. The FDB2050 features long-time and instantaneous (LI) trip functions with load side lug terminals and non-interchangeable trip.
Key Features
- Interrupting rating of 18 kiloampere at 240 VAC, 14 kiloampere at 480/600 VAC, and 10 kiloampere at 250 VDC (UL); 18 kiloampere at 220/240 VAC, 14 kiloampere at 380/415/440/500 VAC, and 10 kiloampere at 250 VDC (IEC)
- Thermal-magnetic protection with long-time and instantaneous trip functions
- Non-interchangeable trip unit for fixed, reliable performance
- Bolt-on mounting compatible with Eaton Series C panelboards and switchboards
- Load side lug terminals for easy installation
Technical Specifications
- Continuous Rating: 50A at 40°C
- Voltage: 600 VAC at 50/60 Hz; 250 VDC maximum
- Poles: 2-pole (single-phase)
- Trip Functions: LI (Long-Time and Instantaneous)
- Frame Size: F-frame; dimensions 4.125″ W × 3.375″ D × 6″ H
- Interrupting Capacity: 14 kAIC at 480/600 VAC; 10 kAIC at 250 VDC (UL)
- Connection Type: Bolt-on with load side lugs
- Trip Unit: Non-interchangeable fixed
- Series: C
- Type: FDB (thermal-magnetic)
- Operating Temperature: 40°C rated
- Standards: UL listed
Typical Applications
The FDB2050 is commonly used in commercial and industrial power distribution panels, motor control centers, and branch circuit protection. Its thermal-magnetic trip mechanism suits general-purpose loads, lighting circuits, and heating applications where standard overcurrent protection is required. The fixed trip unit provides consistent, dependable operation without adjustment, making it ideal for installations where reliability and code compliance are priorities.
Compatibility & Replacements
Compatible With
- Eaton Series C panelboards
- Eaton Series C switchboards
- Bolt-on terminal blocks rated for F-frame breakers
- 600V single-phase electrical distribution systems
- Standard industrial control and power circuits
Replaces / Drop-In Replacement For
- FD2050 (older model)
- Direct replacement for legacy FDB2050 units in existing Series C panelboards
Works With
- Standard 600V, 3-phase and single-phase distribution systems
- Thermal-magnetic trip coordination for cascade protection schemes
- UL and IEC-compliant installations
- NFPA 70 (National Electrical Code) applications
