Square D | FHB16020B | Circuit Breaker | 20A | 1-Pole | 277V

Trustworthy overload protection for 277-volt circuits, the Square D FHB16020B is a 20-amp, 1-pole circuit breaker designed for maintenance, retrofit, and replacement projects where exact specifications matter. If your panel calls for the FHB16020B, this part ensures the same electrical characteristics and compatibility family, so swaps are straightforward and reliable.

Key specifications

• Amperage: 20A
• Poles: 1-Pole
• Voltage: 277V
• Part number: FHB16020B

Compatibility note: Confirm fit and ratings before ordering. The part number is the best reference for compatibility with Square D panels and the FHB family.

Use cases and ideal applications

• Maintenance and replacement of 277V circuits in commercial or industrial spaces, especially lighting and equipment loads
• Retrofit projects where a precise 1-pole, 20A, 277V breaker is required
• Upgrade paths in existing Square D panels to restore reliable overcurrent protection

Why this matters

With a dedicated 277V rating, this breaker protects circuits that power high-efficiency lighting, HVAC controls, and other 277V loads, reducing the risk of nuisance trips and equipment damage. The 1-pole design offers streamlined protection for single-leg circuits, making installation in compatible panels straightforward and space-efficient.

Tips for selection and installation

• Always verify the panel compatibility with the FHB16020B family by matching the part number to your panel label or service manual
• Before any work, shut off power and follow local electrical codes; if unsure, consult a licensed electrician
• Store and handle breakers in their original packaging to avoid damage to the contacting surfaces