Overview
The Square D FY14020B is a thermal-magnetic molded case circuit breaker designed for single-pole applications in commercial and industrial power distribution systems. This I-Line breaker features thermal magnetic construction and provides overload and short circuit protection, making it suitable for lighting circuits and branch protection on I-Line panelboards.
Key Features
- 20 Amp current rating at 40°C ambient temperature
- 14 kilo-Amp interrupting rating at 277 VAC
- 1-pole plug-on mount design for I-Line panelboards
- Rated for 277 VAC and 125 VDC operation
- 50/60 Hz frequency rated
- Thermal-magnetic trip mechanism for precise overcurrent detection
Technical Specifications
- Amperage: 20A
- Voltage Rating: 277 VAC / 125 VDC
- Interrupting Rating: 14,000 Amps @ 277 Volts AC
- Hold Current: 275 Amps; Trip Current: 600 Amps
- Frame Type: F-Frame
- Trip Type: Thermal-Magnetic
- Poles: 1
- Dimensions (D × W × H): 5″ × 1.5″ × 7.5″ (add 1.5″ for bottom bracket)
- Weight: 1.5 lbs
- Mounting: Lug connection plug-on
- Certifications: UL Listed, CSA Certified
Typical Applications
This circuit breaker is designed primarily for use in commercial and industrial applications, providing overcurrent protection for electrical circuits. The FY14020B is suited for 277-volt single-phase electrical systems, which are commonly used in lighting circuits, especially in commercial buildings. It is used on I-Line panel boards and switchboards.
Compatibility & Replacements
Compatible With
- Square D I-Line Class 650 and 651 panelboards
- Square D I-Line switchboard distribution systems
- 277V single-phase AC systems (50/60 Hz)
- 125V DC systems
Replaces / Drop-In Replacement For
The FY14020B is a standard Square D I-Line 1-pole breaker. Verify compatibility with your system integrator before ordering replacement units to ensure proper fit and electrical characteristics on specific panelboard models.
Works With
- Square D I-Line panelboard enclosures
- I-Line molded case breaker lineup (various amperage ratings)
- Standard electrical distribution systems rated 240/277 VAC
