Square D FH16020A 20A 1P 277V Circuit Breaker, Plug-On | AmpState

Square D FH16020A is a 20 A, 1-pole, 277 V plug-on circuit breaker designed for reliable circuit protection in panelboards, load centers, and electrical distribution systems. Built for everyday electrical work, this unit simplifies retrofit projects and maintenance planning by keeping a consistent part number across replacements. Available from AmpState.

• Plug-on installation: quick, tool-free mounting that reduces service time and minimizes miswired connections.
• 277 V rating: optimized for commercial and industrial circuits, including lighting feeders and distribution panels.
• 20 A, 1-Pole: single-pole protection for individual circuits with clear trip performance for safe shutdown.
• Stock-friendly design: maintaining the FH16020A in your inventory supports easier upgrades and consistent maintenance schedules.
• Trusted brand: Square D by Schneider Electric, a long-standing standard in electrical protection equipment.

Where you’ll use it: in panelboards, load centers, and distribution panels where a plug-on breaker fits your existing infrastructure, enabling fast replacements during retrofit work or routine maintenance.

Ideal for: facility managers, electrical contractors, and maintenance teams in commercial or light-industrial settings that run 277 V systems and require reliable, ready-to-install protection devices that match existing part numbers.

• Retrofits that require consistent part numbers to avoid ordering errors
• Maintenance cycles that demand swift, accurate replacements
• New installations leveraging 277 V distribution networks

Need help confirming fit? AmpState can verify compatibility and confirm the correct part number. Message us, and we’ll help ensure a precise match for your panelboard or load center.

Practical installation tips:

• Verify the panel’s labeling shows 277 V and a 1-pole breaker option.
• Ensure the plug-on interface aligns with your bus configuration and that wiring is clean and secure.
• Keep spare FH16020A units on hand for planned maintenance to minimize downtime.