Overview
The Square D FA26020AB is a 2-pole molded case circuit breaker designed for reliable overcurrent protection in industrial control systems and power distribution panels. Built with thermal-magnetic trip technology, this F-frame breaker delivers consistent protection across standard industrial voltages up to 600VAC.
Key Features
- Thermal-magnetic trip unit with long-time and instantaneous protection
- I-Line plug-in mounting for Square D panelboards
- Visi-Trip indicator for visual trip status
- Fixed trip settings for predictable, reliable operation
- Compact F-frame design for space-efficient panel layouts
Technical Specifications
- Amperage Rating: 20A
- Poles: 2
- Voltage Rating: 600VAC, 250VDC
- Interrupting Rating: 25kAIC @ 240V, 18kAIC @ 480V, 14kAIC @ 600V
- Trip Type: Thermal-Magnetic
- Frame Series: F-Frame
- Mounting Style: I-Line Plug-In
- Certifications: UL 489, CSA
Typical Applications
The FA26020AB suits machine tool control circuits, HVAC systems, lighting protection, and general industrial feeder applications. Its fixed thermal-magnetic design makes it ideal where predictable, field-tested protection is required—particularly in retrofit and panel upgrade projects where legacy F-frame compatibility is essential.
Compatibility & Replacements
Compatible With
- Square D I-Line panelboards and enclosures
- Square D F-frame bus structures
- Thermal-magnetic trip circuits in industrial control panels
- Standard 600VAC distribution systems
Replaces / Drop-In Replacement For
The FA26020AB is a legacy F-frame model. Modern equivalents include the FH26020AB (FH-frame, 25kAIC @ 480V) and higher-amperage-rated HDL-series breakers for newer installations. Verify exact cross-reference with your system integrator or breaker documentation before substitution.
Works With
- Square D QO and NQ load center systems
- Industrial UPS and generator backup systems
- Standard industrial 120/208V, 240V, and 480V distribution panels
- Motor protection circuits and feeder applications per NEC Article 430
