Square D FH16090 A - 90 A, 277 V, 1-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D FH16090A — a reliable 90A, 277V, 1-pole plug-in molded case circuit breaker designed to safeguard branch circuits in panelboards and load centers. Built for straightforward installation and dependable protection, it’s the right choice when you need a single-pole solution that fits seamlessly into standard electrical distributions.

Key features that matter in real-world use

• Fast plug-in connection for quick installation and easy field replacements, reducing panel downtime.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding to both sustained overloads and sudden short circuits.
• OEM compatibility designed to work with matching Square D load centers and panelboards, ensuring reliable integration with your existing system.
• Versatile applications ideal for residential, commercial, and light industrial circuits that require dependable branch-circuit protection.

Technical snapshot

• Manufacturer: Square D
• Part Number: FH16090A
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 90A
• Voltage Rating: 277V
• Number of Poles: 1
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Why this breaker stands out in the field

The FH16090A is engineered for durability and predictable performance in everyday electrical distribution tasks. With a 277V rating, it accommodates commercial lighting and other higher-voltage branch circuits while delivering precise protection through its thermal-magnetic trip mechanism. Its plug-in design means service crews can swap in a compatible unit without invasive panel work, keeping critical circuits online with minimal downtime.

Practical considerations for installers and maintainers

• Ensure replacement is for a matching OEM panelboard or load center to preserve fit and protection characteristics.
• Use on circuits where consistent overcurrent and short-circuit protection is needed for safety and equipment longevity.
• Maintain a small inventory of 90A, 277V plug-in breakers for rapid responses to tripped circuits and panel maintenance.