Overview
The Eaton Cutler Hammer FWF3100KL/C is a Series C complete molded case circuit breaker rated for 100A at 690VAC, three-pole configuration. Manufactured by Eaton (formerly Cutler-Hammer), this breaker is designed for industrial and commercial power distribution applications requiring high-voltage protection. The FWF-frame designation indicates an F-frame, feed-through mounting style with fixed thermal and fixed magnetic trip characteristics.
Key Features
- 100A continuous current rating at 690VAC
- Three-pole (3P) configuration for three-phase applications
- Fixed thermal and fixed magnetic trip — provides long-time and instantaneous (LI) protection
- Series C molded case construction — proven industrial-grade reliability
- Line and load side lug terminals for secure connection
- 40 kAIC interrupting capacity at 415VAC
Technical Specifications
| Parameter | Value |
| Rated Current | 100A |
| Voltage Rating | 690VAC / 250VDC |
| Pole Configuration | 3-Pole (3P) |
| Breaker Type | Molded Case, Complete |
| Series | Eaton Series C, F-Frame |
| Trip Unit Type | Fixed Thermal, Fixed Magnetic (TM) |
| Trip Functions | Long-Time (LT) and Instantaneous (I) |
| Interrupting Capacity | 40 kAIC @ 415VAC |
| Terminal Type | Line and Load Lugs |
| Frequency | 50/60 Hz |
Typical Applications
- Industrial power distribution and branch circuit protection
- Motor feeder circuits requiring high-voltage disconnect capability
- International installations operating at 690VAC (common in European and Asian markets)
- OEM machinery and panel integration
- Retrofit and replacement installations in existing industrial control systems
Compatibility & Replacements
Compatible With
- Eaton Series C panelboards and motor control centers (MCCs) with F-frame slots
- Industrial AC power systems rated 690VAC, 50/60 Hz
- Three-phase power distribution networks
- Systems requiring IEC (European) standard molded case breakers
Replaces / Drop-In Replacement For
The FWF3100KL/C is a complete molded case unit-mount breaker. Verify compatibility with your system integrator before ordering for specific OEM or retrofit applications, as replacement models depend on panel manufacturer and frame revision.
Works With
- Eaton Series C panelboards
- Industrial motor control centers (MCCs)
- 690VAC three-phase distribution systems
- IEC-compliant power management systems
- Fixed thermal-magnetic trip coordination with standard feeder breakers
