Square D FH16080 A - 80 A, 277 V, 1-Pole Plug-In Circuit Breaker | AmpState

The Square D FH16080A is a purpose-built 80A, 277V, 1-pole plug-in molded case circuit breaker designed to safeguard your electrical distribution. Engineered for reliable branch circuit protection and swift installation, it fits neatly into panelboards and loadcenters, minimizing downtime during upgrades or replacements.

• Fast plug-in connection for quick installation and hassle-free replacements, reducing service interruptions on busy job sites.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance, adapting to normal operating loads while responding decisively to overcurrent or short-circuit events.
• 277V, 80A, 1-pole configuration tailored for commercial lighting, feeders, and other 277-volt circuits common in office, retail, and light industrial settings.
• OEM-compatible design works with matching manufacturer load centers and panelboards to ensure a seamless, reliable fit and consistent electrical protection across your system.
• Versatile applications suitable for residential, commercial, and light industrial environments where dependable overcurrent and short-circuit protection is essential.

The FH16080A isn't just a breaker—it's a smart choice for upgrading or maintaining critical electrical infrastructure. Its plug-in form factor simplifies field replacements, while the thermal-magnetic trip mechanism provides dependable protection across a range of load conditions. This makes it ideal for panelboard retrofits, new installations in 277V circuits, and spare-breaker inventories for facilities that rely on steady, uninterrupted power delivery.

Who benefits most from the FH16080A:

• Electrical contractors and service technicians seeking rapid, reliable plug-in breakers for 277V panelboards.
• Facility managers overseeing commercial or light industrial electrical systems that demand predictable, repeatable protection against overcurrent and short circuits.
• Property owners planning panel upgrades or replacements where OEM compatibility and consistent protection matters.

Compared with alternative breakers, the FH16080A stands out for its blend of quick installation, precise trip performance, and OEM compatibility. Its plug-in design reduces installation time and field labor, while the thermal-magnetic trip unit provides dependable protection without excessive nuisance tripping or wear on downstream equipment. If you manage 277V circuits in panelboards or loadcenters, this breaker offers a practical, low-downtime solution that aligns with standard electrical codes and installation practices.

Technical snapshot

• Manufacturer: Square D
• Part Number: FH16080A
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 80 A
• Voltage Rating: 277 V
• Number of Poles: 1
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for optimal use:

• Ensure compatibility with your OEM load center or panelboard before installation to maintain coordinated protection and electrical margin.
• Verify the 277V circuit load profile to maximize the benefits of the thermal-magnetic trip, minimizing nuisance trips during startup surges.
• Keep a spare FH16080A on hand for rapid replacement during maintenance cycles to minimize downtime.