Square D FH26040AC 40A 600V 2-Pole Circuit Breaker

The Square D FH26040AC is a 40A, 600V, 2-pole plug-in molded case circuit breaker designed to deliver reliable branch circuit protection for panelboards and load centers. Built for fast, tool-free installation and effortless replacement, this breaker keeps your electrical system aligned with demanding safety standards while minimizing downtime during service or upgrades.

• Fast plug-in connection enables quick installation and straightforward replacements, reducing panel downtime during maintenance or upgrades.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding to both overload conditions (thermal) and short circuits (magnetic), helping to prevent nuisance trips while ensuring fast interruption when needed.
• OEM-compatible design is engineered to be compatible with matching Square D OEM load centers and panelboards for seamless integration and reliable performance.
• Versatile applications suited for residential, commercial, and light industrial environments where dependable overcurrent and short-circuit protection is essential.

Ideal use scenarios include upgrading aging panels, expanding a circuit, or replacing a failed breaker in a Square D system. Its 2-pole configuration ensures simultaneous disconnection of both conductors, enhancing safety in 120/240V or higher voltage applications commonly found in home subpanels, small offices, and shop environments.

What it does and why it matters

The FH26040AC acts as a safety gateway for electrical circuits by interrupting current quickly when overcurrent or a short circuit is detected. With a 40A rating and a 600V maximum voltage, it is positioned for circuits that require solid, dependable protection without compromising on trip reliability or speed.

Specifications at a glance

• Manufacturer: Square D
• Part Number: FH26040AC
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 600V
• Number of Poles: 2
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Square D FH26040AC for a dependable, durable solution that aligns with your existing panel environment and delivers predictable protection characteristics. When you need a plug-in breaker that combines quick installation, precise protection, and OEM compatibility, this 2-pole, 40A unit is a practical, future-proof choice for a wide range of electrical installations.