Square D FH26040AB - 40 A, 600 V, 2-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D FH26040AB—a 40 A, 600 V, 2-pole plug-in molded case circuit breaker designed to safeguard panelboards and load centers with dependable, repeatable protection. Built for fast installation and straightforward replacement, this unit keeps critical circuits—and the people relying on them—protected with minimal downtime.

Key Benefits

• Fast plug-in connection: streamlined installation and quick field replacement keeps service interruptions to a minimum.
• Thermal-magnetic trip unit: combines overload protection with short-circuit response for stable, predictable protection across varying loads and temperatures.
• OEM compatibility: specifically designed to fit matching Square D load centers and panelboards for reliable seating and alignment.
• Versatile, high-voltage protection: 600 V rating expands suitability for residential, commercial, and light industrial applications while maintaining precise protection on each branch circuit.
• Two-pole 40 A configuration: ideal for protecting paired circuits or multi-wire branch circuits where simultaneous disconnection is required.

Product Details

• Manufacturer: Square D
• Part Number: FH26040AB
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40 A
• Voltage Rating: 600 V
• Number of Poles: 2
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal Applications

• Protecting branch circuits in panelboards and load centers within residential, commercial, and light industrial environments.
• Replacing aging or worn plug-in breakers in existing Square D installations for continued reliability.
• Configurations that require a robust 2-pole 40 A protection strategy with a plug-in design for quick service.

Usage and Installation Tips

• Ensure the panelboard or load center is compatible with plug-in molded case breakers of this type and rating.
• Verify the circuit requirements align with a 40 A protection level and a 2-pole configuration for simultaneous disconnect needs.
• Follow all panel manufacturer installation instructions and local electrical codes when installing or replacing breakers.

Designed by a trusted name in electrical protection, the Square D FH26040AB offers precise, reliable performance when you need it most. Its plug-in design minimizes downtime, while the thermal-magnetic trip mechanism delivers consistent protection against overcurrent and short circuits across a range of operating conditions. Whether you're upgrading a panelboard, stocking spares for service life, or outfitting a new installation, this breaker provides the dependable protection you can count on in demanding environments.