Overview
The Square D FA frame 100A circuit breaker is a molded case breaker designed for commercial and industrial power distribution. The FA series uses I-Line style plug-in connections and includes thermal magnetic protection. Popular molded case frames such as FA have been industry standards for decades, and many remain in service today. This used unit is fully functional and ideal for retrofit applications in legacy panelboards and switchboards.
Key Features
- Thermal magnetic protection for long-time and instantaneous (LI) trip functions
- I-Line style plug-in connection for easy installation
- 3-pole configuration for 3-phase industrial applications
- Standard interrupting ratings available (18kA @ 480V or 25kA @ 600V depending on model)
- Compact F-frame design fits standard I-Line panelboards
- UL and CSA certified construction
Technical Specifications
FA frame breakers are available in multiple configurations. Common 100A 3-pole models include:
- FA34100: 480 Volt rated, 100 amp, with 18kA@480V AIC rating
- FA36100: 600 volt rated, 100 amps, with 25kA@480V AIC rating
Typical Applications
- Commercial building electrical panels and switchboards
- Industrial motor control centers and distribution boards
- Backup/emergency power distribution systems
- Legacy equipment retrofits and maintenance replacements
- 3-phase industrial automation and machinery circuits
Compatibility & Replacements
Compatible With
- Square D I-Line family panelboards and switchboards
- Square D I-Line distribution boards
- Industrial control systems requiring 100A 3-pole protection
Replaces / Drop-In Replacement For
- Other Square D FA frame 100A 3-pole units in the same voltage rating
- Legacy system maintenance requiring FA series compatibility
- Facility retrofits upgrading older equipment
Works With
- Square D panelboards with I-Line bussing
- Standard 50/60 Hz electrical systems
- Industrial motor starters and load centers rated for 100A circuits
- Copper or aluminum conductors per rated wire sizing
