Square D | FYB14020B | Circuit Breaker | 20A | 1-Pole | 277V

Square D FYB14020B is a single-pole, 20-amp circuit breaker designed for 277-volt circuits—an essential safety device for commercial and industrial electrical systems. Built for maintenance, retrofit, and replacement, this official Square D part guarantees exact specs and reliable protection for your panel.

• Amperage: 20A
• Poles: 1-Pole
• Voltage: 277V
• Part number: FYB14020B

Why this model stands out

• Exact compatibility aligned with the FYB family—the part number is your best reference for ensuring a proper fit in your panel.
• 277V rating makes it ideal for commercial lighting circuits and other 277V applications common in offices, retail spaces, and industrial environments.
• Reliable protection in a compact, standard-form factor that fits typical panels used in maintenance and retrofit projects.
• Designed for straightforward replacements, reducing downtime during service or upgrades and helping you maintain code-compliant safety thresholds.

Practical use cases

• Maintenance: swap in the FYB14020B to restore overcurrent protection without reconfiguring wiring.
• Retrofit: upgrade or replace aging breakers in 277V distribution circuits while preserving panel labeling and ratings.
• Replacement: keep a ready-to-go spare on service vehicles for quick, field-safe fixes.

Notes: Confirm fit and ratings before ordering. The part number is the best reference for compatibility, ensuring you select the exact breaker needed for your Square D panel and 277V circuits.