Overview
The Square D FY14015B is a single-pole thermal-magnetic molded case circuit breaker designed for I-Line panelboards and switchboards. Rated at 15 amperes and 277VAC, this breaker delivers reliable overcurrent protection in industrial and commercial power distribution applications. The plug-in I-Line connection style provides quick installation and maintenance access in Class 650/651 equipment.
Key Features
- Thermal-Magnetic Trip: Long time and instantaneous trip functions provide coordinated overcurrent protection
- I-Line Plug-In: I-Line style plug-in connection type allows fast swap-out without panel modification
- High Interrupting Rating: 14kAIC at 240V for standard industrial fault levels
- Dual Voltage Operation: 277VAC, 125VDC rated for versatile installation options
- B-Phase Connection: Suitable for B-phase conductor arrangements in three-phase systems
Technical Specifications
- Catalog Number: FY14015B
- Poles: 1
- Amperage Rating: 15A at 40°C
- Voltage: 240/277VAC (50/60 Hz) at UL/CSA rating; 125VDC
- Interrupting Rating: 14kAIC at 240/277VAC (UL/CSA)
- Trip Setting Range: 275–600 amperes
- Connection Type: I-Line plug-in
- Tripping Method: Thermal-magnetic
- Terminal Wire Size: 14–4 AWG copper / 12–4 AWG aluminum
- Frame Type: FY (Frame F)
- Application: Power distribution in Class 650/651 I-Line panelboards and switchboards
- Approvals: UL, CSA
Typical Applications
The Square D FY14015B is used on Class 650/651 I-Line panelboard and switchboard installations. Common deployment scenarios include:
- Branch circuit protection in industrial control panels
- Lighting and power distribution in commercial buildings
- Motor branch circuits in manufacturing facilities
- HVAC and mechanical systems protection
- Data centers and telecommunications rooms
Compatibility & Replacements
Compatible With
- Square D Class 650 I-Line panelboards
- Square D Class 651 I-Line switchboards
- Schneider Electric power distribution equipment (parent company)
- Standard three-phase wye and delta systems at 277V
- Single-phase 120/277V systems
Replaces / Drop-In Replacement For
- Direct replacement for existing FY14015B units
- Verify compatibility with your panel configuration; B-phase connector variant is specific to this model
Works With
- Square D I-Line panelboard mounting frames and assemblies
- Standard thermal-magnetic trip coordination schemes
- Power monitoring and protection systems requiring Class 650/651 breaker slots
- NFPA 70 (National Electrical Code) compliant installations
